/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-04 21:41:29,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-04 21:41:29,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-04 21:41:29,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-04 21:41:29,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-04 21:41:29,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-04 21:41:29,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-04 21:41:29,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-04 21:41:29,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-04 21:41:29,866 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-04 21:41:29,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-04 21:41:29,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-04 21:41:29,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-04 21:41:29,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-04 21:41:29,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-04 21:41:29,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-04 21:41:29,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-04 21:41:29,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-04 21:41:29,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-04 21:41:29,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-04 21:41:29,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-04 21:41:29,880 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-04 21:41:29,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-04 21:41:29,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-04 21:41:29,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-04 21:41:29,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-04 21:41:29,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-04 21:41:29,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-04 21:41:29,896 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 [2021-06-04 21:41:29,923 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-04 21:41:29,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-04 21:41:29,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-04 21:41:29,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-04 21:41:29,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-04 21:41:29,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-04 21:41:29,926 INFO L138 SettingsManager]: * Use SBE=true [2021-06-04 21:41:29,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-04 21:41:29,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-04 21:41:29,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-04 21:41:29,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-04 21:41:29,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-04 21:41:29,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-04 21:41:29,928 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-04 21:41:29,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-04 21:41:29,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-04 21:41:30,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-04 21:41:30,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-04 21:41:30,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-04 21:41:30,196 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-04 21:41:30,197 INFO L275 PluginConnector]: CDTParser initialized [2021-06-04 21:41:30,197 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-04 21:41:30,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/330374a65/1575ec93a2504422a1f8a57425d7eae6/FLAGcff94c965 [2021-06-04 21:41:30,631 INFO L306 CDTParser]: Found 1 translation units. [2021-06-04 21:41:30,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2021-06-04 21:41:30,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/330374a65/1575ec93a2504422a1f8a57425d7eae6/FLAGcff94c965 [2021-06-04 21:41:30,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/330374a65/1575ec93a2504422a1f8a57425d7eae6 [2021-06-04 21:41:30,660 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-04 21:41:30,661 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-04 21:41:30,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-04 21:41:30,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-04 21:41:30,665 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-04 21:41:30,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:30,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e37a7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30, skipping insertion in model container [2021-06-04 21:41:30,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:30,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-04 21:41:30,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-04 21:41:30,899 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-2.i[30964,30977] [2021-06-04 21:41:30,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:41:30,906 INFO L203 MainTranslator]: Completed pre-run [2021-06-04 21:41:30,933 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-2.i[30964,30977] [2021-06-04 21:41:30,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-04 21:41:30,986 INFO L208 MainTranslator]: Completed translation [2021-06-04 21:41:30,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30 WrapperNode [2021-06-04 21:41:30,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-04 21:41:30,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-04 21:41:30,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-04 21:41:30,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-04 21:41:30,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,013 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-04 21:41:31,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-04 21:41:31,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-04 21:41:31,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-04 21:41:31,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (1/1) ... [2021-06-04 21:41:31,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-04 21:41:31,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-04 21:41:31,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-04 21:41:31,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-04 21:41:31,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (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 [2021-06-04 21:41:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-04 21:41:31,122 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-04 21:41:31,122 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-04 21:41:31,123 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-04 21:41:31,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-04 21:41:31,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-04 21:41:31,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-04 21:41:31,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-04 21:41:31,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-04 21:41:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-04 21:41:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-04 21:41:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-04 21:41:31,126 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-04 21:41:31,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-04 21:41:31,456 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-04 21:41:31,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:41:31 BoogieIcfgContainer [2021-06-04 21:41:31,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-04 21:41:31,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-04 21:41:31,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-04 21:41:31,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-04 21:41:31,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 09:41:30" (1/3) ... [2021-06-04 21:41:31,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b63d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:41:31, skipping insertion in model container [2021-06-04 21:41:31,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 09:41:30" (2/3) ... [2021-06-04 21:41:31,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c4b63d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 09:41:31, skipping insertion in model container [2021-06-04 21:41:31,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 09:41:31" (3/3) ... [2021-06-04 21:41:31,463 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-06-04 21:41:31,469 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-04 21:41:31,469 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-04 21:41:31,470 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-04 21:41:31,470 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-04 21:41:31,496 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,496 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,501 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,502 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,508 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,508 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,509 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,509 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,513 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,514 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,514 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-04 21:41:31,516 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-04 21:41:31,531 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-04 21:41:31,550 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-04 21:41:31,550 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-04 21:41:31,550 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-04 21:41:31,550 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-04 21:41:31,551 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-04 21:41:31,551 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-04 21:41:31,551 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-04 21:41:31,551 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-04 21:41:31,559 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-04 21:41:31,626 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) [2021-06-04 21:41:31,630 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) [2021-06-04 21:41:31,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-04 21:41:31,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:31,646 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] [2021-06-04 21:41:31,646 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:31,650 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-04 21:41:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:31,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88575047] [2021-06-04 21:41:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:31,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:31,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88575047] [2021-06-04 21:41:31,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88575047] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:31,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:31,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:41:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667558100] [2021-06-04 21:41:31,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:41:31,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:31,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:41:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:41:31,946 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) [2021-06-04 21:41:32,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:32,110 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-04 21:41:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-04 21:41:32,111 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 [2021-06-04 21:41:32,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:32,132 INFO L225 Difference]: With dead ends: 3294 [2021-06-04 21:41:32,132 INFO L226 Difference]: Without dead ends: 1248 [2021-06-04 21:41:32,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-04 21:41:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-04 21:41:32,230 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) [2021-06-04 21:41:32,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-04 21:41:32,234 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-04 21:41:32,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:32,234 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-04 21:41:32,234 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) [2021-06-04 21:41:32,234 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-04 21:41:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-04 21:41:32,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:32,239 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] [2021-06-04 21:41:32,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-04 21:41:32,240 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-04 21:41:32,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280884381] [2021-06-04 21:41:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280884381] [2021-06-04 21:41:32,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280884381] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:32,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:32,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-04 21:41:32,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877005339] [2021-06-04 21:41:32,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-04 21:41:32,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-04 21:41:32,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-04 21:41:32,390 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) [2021-06-04 21:41:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:32,505 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-04 21:41:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-04 21:41:32,506 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 [2021-06-04 21:41:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:32,511 INFO L225 Difference]: With dead ends: 1302 [2021-06-04 21:41:32,511 INFO L226 Difference]: Without dead ends: 920 [2021-06-04 21:41:32,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-04 21:41:32,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-04 21:41:32,534 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) [2021-06-04 21:41:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-04 21:41:32,539 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-04 21:41:32,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:32,539 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-04 21:41:32,540 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) [2021-06-04 21:41:32,540 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-04 21:41:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:32,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:32,541 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] [2021-06-04 21:41:32,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-04 21:41:32,541 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,544 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-06-04 21:41:32,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379374044] [2021-06-04 21:41:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379374044] [2021-06-04 21:41:32,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379374044] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:32,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:32,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:32,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678452178] [2021-06-04 21:41:32,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:32,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:32,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:32,655 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) [2021-06-04 21:41:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:32,817 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-04 21:41:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:41:32,817 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 [2021-06-04 21:41:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:32,821 INFO L225 Difference]: With dead ends: 1304 [2021-06-04 21:41:32,821 INFO L226 Difference]: Without dead ends: 1044 [2021-06-04 21:41:32,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-04 21:41:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-04 21:41:32,834 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) [2021-06-04 21:41:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-04 21:41:32,837 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-04 21:41:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:32,837 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-04 21:41:32,837 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) [2021-06-04 21:41:32,837 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-04 21:41:32,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:32,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:32,838 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] [2021-06-04 21:41:32,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-04 21:41:32,838 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:32,839 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-06-04 21:41:32,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:32,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14177765] [2021-06-04 21:41:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:32,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:32,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14177765] [2021-06-04 21:41:32,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14177765] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:32,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:32,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-04 21:41:32,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689895871] [2021-06-04 21:41:32,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-04 21:41:32,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:32,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-04 21:41:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-04 21:41:32,927 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) [2021-06-04 21:41:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,043 INFO L93 Difference]: Finished difference Result 1836 states and 4872 transitions. [2021-06-04 21:41:33,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:41:33,046 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 [2021-06-04 21:41:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,052 INFO L225 Difference]: With dead ends: 1836 [2021-06-04 21:41:33,052 INFO L226 Difference]: Without dead ends: 1505 [2021-06-04 21:41:33,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-04 21:41:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-04 21:41:33,071 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) [2021-06-04 21:41:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-04 21:41:33,074 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-04 21:41:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,075 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-04 21:41:33,075 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) [2021-06-04 21:41:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-04 21:41:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:33,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,077 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] [2021-06-04 21:41:33,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-04 21:41:33,077 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:33,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-06-04 21:41:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:33,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208811319] [2021-06-04 21:41:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:33,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208811319] [2021-06-04 21:41:33,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208811319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:33,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:33,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:33,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039955812] [2021-06-04 21:41:33,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:33,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:33,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:33,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:33,142 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) [2021-06-04 21:41:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,229 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-04 21:41:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-04 21:41:33,229 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 [2021-06-04 21:41:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,236 INFO L225 Difference]: With dead ends: 2211 [2021-06-04 21:41:33,236 INFO L226 Difference]: Without dead ends: 1944 [2021-06-04 21:41:33,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-04 21:41:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-04 21:41:33,259 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) [2021-06-04 21:41:33,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-04 21:41:33,262 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-04 21:41:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,262 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-04 21:41:33,262 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) [2021-06-04 21:41:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-04 21:41:33,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-04 21:41:33,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,263 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] [2021-06-04 21:41:33,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-04 21:41:33,263 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:33,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-06-04 21:41:33,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:33,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829766236] [2021-06-04 21:41:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:33,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829766236] [2021-06-04 21:41:33,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829766236] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-04 21:41:33,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-04 21:41:33,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-04 21:41:33,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301867638] [2021-06-04 21:41:33,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-04 21:41:33,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:33,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-04 21:41:33,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-04 21:41:33,331 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) [2021-06-04 21:41:33,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,491 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-04 21:41:33,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-04 21:41:33,491 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 [2021-06-04 21:41:33,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,495 INFO L225 Difference]: With dead ends: 1671 [2021-06-04 21:41:33,495 INFO L226 Difference]: Without dead ends: 1173 [2021-06-04 21:41:33,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:33,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-04 21:41:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-04 21:41:33,510 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) [2021-06-04 21:41:33,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-04 21:41:33,512 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-04 21:41:33,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,512 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-04 21:41:33,513 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) [2021-06-04 21:41:33,513 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-04 21:41:33,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:33,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,514 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] [2021-06-04 21:41:33,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-04 21:41:33,514 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:33,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:33,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-06-04 21:41:33,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:33,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457684411] [2021-06-04 21:41:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:33,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457684411] [2021-06-04 21:41:33,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457684411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:33,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793519821] [2021-06-04 21:41:33,580 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 [2021-06-04 21:41:33,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:33,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-04 21:41:33,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:33,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793519821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:33,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:33,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:41:33,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135423461] [2021-06-04 21:41:33,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:33,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:33,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:33,794 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) [2021-06-04 21:41:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:33,909 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-04 21:41:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-04 21:41:33,909 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 [2021-06-04 21:41:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:33,914 INFO L225 Difference]: With dead ends: 1526 [2021-06-04 21:41:33,914 INFO L226 Difference]: Without dead ends: 1256 [2021-06-04 21:41:33,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-04 21:41:33,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-04 21:41:33,936 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) [2021-06-04 21:41:33,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-04 21:41:33,938 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-04 21:41:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:33,939 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-04 21:41:33,939 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) [2021-06-04 21:41:33,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-04 21:41:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:33,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:33,940 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] [2021-06-04 21:41:34,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-04 21:41:34,153 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-06-04 21:41:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460218220] [2021-06-04 21:41:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:34,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:34,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460218220] [2021-06-04 21:41:34,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460218220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833477849] [2021-06-04 21:41:34,197 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 [2021-06-04 21:41:34,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:34,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:34,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833477849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:34,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-04 21:41:34,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340277810] [2021-06-04 21:41:34,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:34,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:34,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:34,347 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) [2021-06-04 21:41:34,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:34,460 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-04 21:41:34,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:41:34,460 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 [2021-06-04 21:41:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:34,466 INFO L225 Difference]: With dead ends: 2408 [2021-06-04 21:41:34,466 INFO L226 Difference]: Without dead ends: 2138 [2021-06-04 21:41:34,466 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:34,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-04 21:41:34,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-04 21:41:34,488 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) [2021-06-04 21:41:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-04 21:41:34,491 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-04 21:41:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:34,491 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-04 21:41:34,491 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) [2021-06-04 21:41:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-04 21:41:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-04 21:41:34,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:34,492 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] [2021-06-04 21:41:34,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:34,713 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:34,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-06-04 21:41:34,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:34,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826943894] [2021-06-04 21:41:34,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:34,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826943894] [2021-06-04 21:41:34,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826943894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796232448] [2021-06-04 21:41:34,799 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 [2021-06-04 21:41:34,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-04 21:41:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:34,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:34,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:34,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796232448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:34,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:34,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-04 21:41:34,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634120499] [2021-06-04 21:41:34,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:34,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:34,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:34,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:34,959 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) [2021-06-04 21:41:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:35,187 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-04 21:41:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:35,187 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 [2021-06-04 21:41:35,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:35,192 INFO L225 Difference]: With dead ends: 2196 [2021-06-04 21:41:35,192 INFO L226 Difference]: Without dead ends: 1621 [2021-06-04 21:41:35,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:41:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-04 21:41:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-04 21:41:35,211 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) [2021-06-04 21:41:35,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-04 21:41:35,213 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-04 21:41:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:35,214 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-04 21:41:35,214 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) [2021-06-04 21:41:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-04 21:41:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:35,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:35,215 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] [2021-06-04 21:41:35,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:35,429 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:35,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:35,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-06-04 21:41:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:35,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706266122] [2021-06-04 21:41:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706266122] [2021-06-04 21:41:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706266122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153321758] [2021-06-04 21:41:35,504 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 [2021-06-04 21:41:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:35,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:35,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:35,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153321758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:35,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:35,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:35,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964889220] [2021-06-04 21:41:35,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:35,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:35,681 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) [2021-06-04 21:41:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:35,842 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-04 21:41:35,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:35,843 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 [2021-06-04 21:41:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:35,848 INFO L225 Difference]: With dead ends: 2068 [2021-06-04 21:41:35,848 INFO L226 Difference]: Without dead ends: 1734 [2021-06-04 21:41:35,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:41:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-04 21:41:35,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-04 21:41:35,886 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) [2021-06-04 21:41:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-04 21:41:35,891 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-04 21:41:35,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:35,891 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-04 21:41:35,892 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) [2021-06-04 21:41:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-04 21:41:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:35,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:35,893 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] [2021-06-04 21:41:36,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:36,111 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-06-04 21:41:36,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:36,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664491485] [2021-06-04 21:41:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664491485] [2021-06-04 21:41:36,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664491485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389800350] [2021-06-04 21:41:36,163 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 [2021-06-04 21:41:36,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:36,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389800350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:36,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:41:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315144063] [2021-06-04 21:41:36,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:36,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:36,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:36,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:36,300 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) [2021-06-04 21:41:36,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:36,389 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-04 21:41:36,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-04 21:41:36,389 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 [2021-06-04 21:41:36,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:36,394 INFO L225 Difference]: With dead ends: 2061 [2021-06-04 21:41:36,394 INFO L226 Difference]: Without dead ends: 1791 [2021-06-04 21:41:36,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:41:36,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-04 21:41:36,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-04 21:41:36,412 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) [2021-06-04 21:41:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-04 21:41:36,414 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-04 21:41:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:36,415 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-04 21:41:36,415 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) [2021-06-04 21:41:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-04 21:41:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:36,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:36,416 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] [2021-06-04 21:41:36,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-04 21:41:36,637 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-06-04 21:41:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:36,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728273899] [2021-06-04 21:41:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:36,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728273899] [2021-06-04 21:41:36,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728273899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203106423] [2021-06-04 21:41:36,706 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 [2021-06-04 21:41:36,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:41:36,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:36,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203106423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:36,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:36,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:41:36,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885582607] [2021-06-04 21:41:36,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:36,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:36,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:36,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:36,881 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) [2021-06-04 21:41:37,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:37,029 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-04 21:41:37,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:37,030 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 [2021-06-04 21:41:37,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:37,033 INFO L225 Difference]: With dead ends: 2006 [2021-06-04 21:41:37,033 INFO L226 Difference]: Without dead ends: 1736 [2021-06-04 21:41:37,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:41:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-04 21:41:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-04 21:41:37,052 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) [2021-06-04 21:41:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-04 21:41:37,055 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-04 21:41:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:37,055 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-04 21:41:37,055 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) [2021-06-04 21:41:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-04 21:41:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:37,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:37,056 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] [2021-06-04 21:41:37,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,279 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:37,279 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-06-04 21:41:37,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:37,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686645429] [2021-06-04 21:41:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686645429] [2021-06-04 21:41:37,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686645429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487095070] [2021-06-04 21:41:37,342 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 [2021-06-04 21:41:37,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:37,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487095070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:37,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-04 21:41:37,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962258722] [2021-06-04 21:41:37,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-04 21:41:37,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:37,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-04 21:41:37,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-04 21:41:37,467 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) [2021-06-04 21:41:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:37,592 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-04 21:41:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-04 21:41:37,592 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 [2021-06-04 21:41:37,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:37,596 INFO L225 Difference]: With dead ends: 2798 [2021-06-04 21:41:37,596 INFO L226 Difference]: Without dead ends: 2528 [2021-06-04 21:41:37,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:41:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-04 21:41:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-04 21:41:37,622 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) [2021-06-04 21:41:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-04 21:41:37,625 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-04 21:41:37,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:37,625 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-04 21:41:37,625 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) [2021-06-04 21:41:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-04 21:41:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-04 21:41:37,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:37,626 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] [2021-06-04 21:41:37,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:37,841 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-06-04 21:41:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880013222] [2021-06-04 21:41:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:37,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880013222] [2021-06-04 21:41:37,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880013222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:37,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958147616] [2021-06-04 21:41:37,899 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 [2021-06-04 21:41:37,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-04 21:41:37,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:37,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-04 21:41:37,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958147616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:38,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-04 21:41:38,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547900972] [2021-06-04 21:41:38,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-04 21:41:38,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:38,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-04 21:41:38,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-04 21:41:38,070 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) [2021-06-04 21:41:38,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:38,262 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-04 21:41:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:38,263 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 [2021-06-04 21:41:38,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:38,269 INFO L225 Difference]: With dead ends: 2285 [2021-06-04 21:41:38,269 INFO L226 Difference]: Without dead ends: 1706 [2021-06-04 21:41:38,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:41:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-04 21:41:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-04 21:41:38,286 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) [2021-06-04 21:41:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-04 21:41:38,288 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-04 21:41:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:38,288 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-04 21:41:38,288 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) [2021-06-04 21:41:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-04 21:41:38,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:38,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:38,289 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] [2021-06-04 21:41:38,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-04 21:41:38,505 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:38,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:38,505 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-06-04 21:41:38,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:38,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966649932] [2021-06-04 21:41:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:38,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966649932] [2021-06-04 21:41:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966649932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508501521] [2021-06-04 21:41:38,577 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 [2021-06-04 21:41:38,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-04 21:41:38,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:38,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:38,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508501521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:38,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:38,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:41:38,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927664732] [2021-06-04 21:41:38,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:38,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:38,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:38,734 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) [2021-06-04 21:41:38,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:38,892 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-04 21:41:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:38,893 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 [2021-06-04 21:41:38,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:38,895 INFO L225 Difference]: With dead ends: 1931 [2021-06-04 21:41:38,895 INFO L226 Difference]: Without dead ends: 1661 [2021-06-04 21:41:38,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:41:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-04 21:41:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-04 21:41:38,913 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) [2021-06-04 21:41:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-04 21:41:38,915 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-04 21:41:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:38,916 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-04 21:41:38,916 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) [2021-06-04 21:41:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-04 21:41:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:38,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:38,917 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] [2021-06-04 21:41:39,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-04 21:41:39,134 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:39,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:39,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-06-04 21:41:39,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:39,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292767416] [2021-06-04 21:41:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:39,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292767416] [2021-06-04 21:41:39,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292767416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095008306] [2021-06-04 21:41:39,203 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 [2021-06-04 21:41:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-04 21:41:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095008306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:39,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851408911] [2021-06-04 21:41:39,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:39,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:39,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:39,358 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) [2021-06-04 21:41:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:39,546 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-04 21:41:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:39,546 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 [2021-06-04 21:41:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:39,549 INFO L225 Difference]: With dead ends: 2111 [2021-06-04 21:41:39,549 INFO L226 Difference]: Without dead ends: 1841 [2021-06-04 21:41:39,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:39,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-04 21:41:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-04 21:41:39,568 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) [2021-06-04 21:41:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-04 21:41:39,571 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-04 21:41:39,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:39,571 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-04 21:41:39,571 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) [2021-06-04 21:41:39,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-04 21:41:39,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:39,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:39,573 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] [2021-06-04 21:41:39,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-04 21:41:39,789 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:39,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:39,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-06-04 21:41:39,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:39,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156956447] [2021-06-04 21:41:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:39,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:39,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156956447] [2021-06-04 21:41:39,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156956447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:39,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173395528] [2021-06-04 21:41:39,859 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 [2021-06-04 21:41:39,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:39,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:39,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:39,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173395528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:40,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-04 21:41:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979710209] [2021-06-04 21:41:40,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-04 21:41:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-04 21:41:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-04 21:41:40,028 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) [2021-06-04 21:41:40,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:40,194 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-04 21:41:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:40,195 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 [2021-06-04 21:41:40,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:40,198 INFO L225 Difference]: With dead ends: 2858 [2021-06-04 21:41:40,198 INFO L226 Difference]: Without dead ends: 2588 [2021-06-04 21:41:40,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:41:40,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-04 21:41:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-04 21:41:40,224 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) [2021-06-04 21:41:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-04 21:41:40,226 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-04 21:41:40,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:40,226 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-04 21:41:40,227 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) [2021-06-04 21:41:40,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-04 21:41:40,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-04 21:41:40,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:40,228 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] [2021-06-04 21:41:40,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-04 21:41:40,445 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-06-04 21:41:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:40,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113042973] [2021-06-04 21:41:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:40,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113042973] [2021-06-04 21:41:40,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113042973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380208021] [2021-06-04 21:41:40,497 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 [2021-06-04 21:41:40,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-04 21:41:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:40,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:40,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:40,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380208021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:40,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:40,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-04 21:41:40,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255954070] [2021-06-04 21:41:40,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:40,649 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) [2021-06-04 21:41:40,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:40,902 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-04 21:41:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:40,902 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 [2021-06-04 21:41:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:40,906 INFO L225 Difference]: With dead ends: 2726 [2021-06-04 21:41:40,906 INFO L226 Difference]: Without dead ends: 2151 [2021-06-04 21:41:40,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 214.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:40,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-04 21:41:40,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-04 21:41:40,926 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) [2021-06-04 21:41:40,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-04 21:41:40,929 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-04 21:41:40,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:40,929 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-04 21:41:40,929 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) [2021-06-04 21:41:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-04 21:41:40,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:40,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:40,931 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] [2021-06-04 21:41:41,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-04 21:41:41,148 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:41,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:41,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-06-04 21:41:41,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:41,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284594803] [2021-06-04 21:41:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:41,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284594803] [2021-06-04 21:41:41,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284594803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737631171] [2021-06-04 21:41:41,239 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 [2021-06-04 21:41:41,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:41,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737631171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:41,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-04 21:41:41,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358472882] [2021-06-04 21:41:41,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:41,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:41,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:41,442 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2021-06-04 21:41:41,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:41,624 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-04 21:41:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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 60 [2021-06-04 21:41:41,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:41,627 INFO L225 Difference]: With dead ends: 2468 [2021-06-04 21:41:41,627 INFO L226 Difference]: Without dead ends: 2134 [2021-06-04 21:41:41,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:41:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-04 21:41:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-04 21:41:41,648 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) [2021-06-04 21:41:41,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-04 21:41:41,650 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-04 21:41:41,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:41,650 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-04 21:41:41,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 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) [2021-06-04 21:41:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-04 21:41:41,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:41,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:41,652 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] [2021-06-04 21:41:41,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:41,863 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:41,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-06-04 21:41:41,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:41,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470218489] [2021-06-04 21:41:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:41,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470218489] [2021-06-04 21:41:41,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470218489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:41,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205992997] [2021-06-04 21:41:41,927 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 [2021-06-04 21:41:41,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:41:41,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:41,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:41,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205992997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:42,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:41:42,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056677567] [2021-06-04 21:41:42,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:42,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:42,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:42,071 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 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) [2021-06-04 21:41:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:42,192 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-04 21:41:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-04 21:41:42,192 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 [2021-06-04 21:41:42,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:42,194 INFO L225 Difference]: With dead ends: 2561 [2021-06-04 21:41:42,195 INFO L226 Difference]: Without dead ends: 2291 [2021-06-04 21:41:42,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 111.3ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:41:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-04 21:41:42,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-04 21:41:42,217 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) [2021-06-04 21:41:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:42,220 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:42,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:42,220 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:42,220 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) [2021-06-04 21:41:42,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:42,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:42,222 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] [2021-06-04 21:41:42,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:42,437 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:42,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:42,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-06-04 21:41:42,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:42,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128154858] [2021-06-04 21:41:42,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128154858] [2021-06-04 21:41:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128154858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948961842] [2021-06-04 21:41:42,506 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 [2021-06-04 21:41:42,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:41:42,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948961842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:42,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:42,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:41:42,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402177759] [2021-06-04 21:41:42,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:42,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:42,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:42,662 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:42,862 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-04 21:41:42,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:42,862 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:41:42,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:42,864 INFO L225 Difference]: With dead ends: 2446 [2021-06-04 21:41:42,864 INFO L226 Difference]: Without dead ends: 2176 [2021-06-04 21:41:42,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-04 21:41:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-04 21:41:42,883 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) [2021-06-04 21:41:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:42,885 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:42,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:42,885 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:42,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:42,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:42,888 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] [2021-06-04 21:41:43,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-04 21:41:43,104 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:43,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:43,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-06-04 21:41:43,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:43,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208913026] [2021-06-04 21:41:43,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208913026] [2021-06-04 21:41:43,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208913026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664940773] [2021-06-04 21:41:43,164 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 [2021-06-04 21:41:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:43,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:43,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664940773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:43,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:41:43,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039086209] [2021-06-04 21:41:43,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:43,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:43,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:43,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:43,297 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) [2021-06-04 21:41:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:43,439 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-04 21:41:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-04 21:41:43,440 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 [2021-06-04 21:41:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:43,442 INFO L225 Difference]: With dead ends: 2421 [2021-06-04 21:41:43,442 INFO L226 Difference]: Without dead ends: 2151 [2021-06-04 21:41:43,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:41:43,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-04 21:41:43,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-04 21:41:43,462 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) [2021-06-04 21:41:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-04 21:41:43,464 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-04 21:41:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:43,464 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-04 21:41:43,465 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) [2021-06-04 21:41:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-04 21:41:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:43,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:43,466 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] [2021-06-04 21:41:43,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:43,681 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-06-04 21:41:43,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:43,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731834227] [2021-06-04 21:41:43,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:43,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731834227] [2021-06-04 21:41:43,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731834227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667599032] [2021-06-04 21:41:43,750 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 [2021-06-04 21:41:43,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:43,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:43,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:43,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667599032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:43,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:43,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:41:43,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454539713] [2021-06-04 21:41:43,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:43,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:43,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:43,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:43,921 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:44,167 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-04 21:41:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:44,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:41:44,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:44,170 INFO L225 Difference]: With dead ends: 2431 [2021-06-04 21:41:44,170 INFO L226 Difference]: Without dead ends: 2161 [2021-06-04 21:41:44,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:41:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-04 21:41:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-04 21:41:44,194 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) [2021-06-04 21:41:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-04 21:41:44,197 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-04 21:41:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:44,197 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-04 21:41:44,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-04 21:41:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:44,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:44,199 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] [2021-06-04 21:41:44,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-04 21:41:44,409 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:44,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-06-04 21:41:44,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:44,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702424070] [2021-06-04 21:41:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702424070] [2021-06-04 21:41:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702424070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438095088] [2021-06-04 21:41:44,477 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 [2021-06-04 21:41:44,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:41:44,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:44,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:44,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438095088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:44,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:44,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-04 21:41:44,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881513321] [2021-06-04 21:41:44,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-04 21:41:44,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:44,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-04 21:41:44,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-04 21:41:44,609 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 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) [2021-06-04 21:41:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:44,785 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-04 21:41:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:44,785 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 [2021-06-04 21:41:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:44,788 INFO L225 Difference]: With dead ends: 3198 [2021-06-04 21:41:44,788 INFO L226 Difference]: Without dead ends: 2928 [2021-06-04 21:41:44,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 146.7ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-04 21:41:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-04 21:41:44,814 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) [2021-06-04 21:41:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-04 21:41:44,817 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-04 21:41:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:44,818 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-04 21:41:44,818 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) [2021-06-04 21:41:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-04 21:41:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-04 21:41:44,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:44,819 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] [2021-06-04 21:41:45,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-04 21:41:45,036 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-06-04 21:41:45,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:45,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487559290] [2021-06-04 21:41:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487559290] [2021-06-04 21:41:45,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487559290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383118315] [2021-06-04 21:41:45,094 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 [2021-06-04 21:41:45,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:45,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:45,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-04 21:41:45,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383118315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:45,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-04 21:41:45,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094373135] [2021-06-04 21:41:45,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:45,262 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) [2021-06-04 21:41:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:45,589 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-04 21:41:45,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:45,590 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 [2021-06-04 21:41:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:45,592 INFO L225 Difference]: With dead ends: 3021 [2021-06-04 21:41:45,592 INFO L226 Difference]: Without dead ends: 2446 [2021-06-04 21:41:45,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-04 21:41:45,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-04 21:41:45,614 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) [2021-06-04 21:41:45,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-04 21:41:45,616 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-04 21:41:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:45,617 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-04 21:41:45,617 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) [2021-06-04 21:41:45,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-04 21:41:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:45,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:45,620 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] [2021-06-04 21:41:45,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-04 21:41:45,829 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-06-04 21:41:45,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:45,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780968199] [2021-06-04 21:41:45,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:45,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:45,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780968199] [2021-06-04 21:41:45,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780968199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:45,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270049499] [2021-06-04 21:41:45,916 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 [2021-06-04 21:41:45,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-04 21:41:45,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:45,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270049499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:46,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:46,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068380719] [2021-06-04 21:41:46,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:46,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:46,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:46,060 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) [2021-06-04 21:41:46,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:46,246 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-04 21:41:46,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:41:46,246 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 [2021-06-04 21:41:46,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:46,249 INFO L225 Difference]: With dead ends: 2321 [2021-06-04 21:41:46,249 INFO L226 Difference]: Without dead ends: 2051 [2021-06-04 21:41:46,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-04 21:41:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-04 21:41:46,268 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) [2021-06-04 21:41:46,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-04 21:41:46,270 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-04 21:41:46,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:46,270 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-04 21:41:46,270 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) [2021-06-04 21:41:46,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-04 21:41:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:46,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:46,272 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] [2021-06-04 21:41:46,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-04 21:41:46,485 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-06-04 21:41:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:46,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420199775] [2021-06-04 21:41:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:46,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420199775] [2021-06-04 21:41:46,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420199775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063503374] [2021-06-04 21:41:46,566 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 [2021-06-04 21:41:46,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-04 21:41:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:46,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:46,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:46,721 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:46,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063503374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:46,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:46,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:46,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464573882] [2021-06-04 21:41:46,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:46,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:46,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:46,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:46,723 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) [2021-06-04 21:41:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:46,923 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-04 21:41:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:46,924 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 [2021-06-04 21:41:46,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:46,926 INFO L225 Difference]: With dead ends: 2491 [2021-06-04 21:41:46,926 INFO L226 Difference]: Without dead ends: 2221 [2021-06-04 21:41:46,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:41:46,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-04 21:41:46,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-04 21:41:46,958 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) [2021-06-04 21:41:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-04 21:41:46,960 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-04 21:41:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:46,960 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-04 21:41:46,961 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) [2021-06-04 21:41:46,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-04 21:41:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:46,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:46,963 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] [2021-06-04 21:41:47,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-04 21:41:47,177 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:47,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:47,177 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-06-04 21:41:47,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:47,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152516782] [2021-06-04 21:41:47,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152516782] [2021-06-04 21:41:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152516782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319287653] [2021-06-04 21:41:47,258 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 [2021-06-04 21:41:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:47,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319287653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:47,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:47,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865884064] [2021-06-04 21:41:47,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:47,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:47,403 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) [2021-06-04 21:41:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:47,610 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-04 21:41:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:47,610 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 [2021-06-04 21:41:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:47,612 INFO L225 Difference]: With dead ends: 2566 [2021-06-04 21:41:47,613 INFO L226 Difference]: Without dead ends: 2296 [2021-06-04 21:41:47,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:41:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-04 21:41:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-04 21:41:47,633 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) [2021-06-04 21:41:47,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-04 21:41:47,636 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-04 21:41:47,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:47,636 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-04 21:41:47,636 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) [2021-06-04 21:41:47,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-04 21:41:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:47,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:47,638 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] [2021-06-04 21:41:47,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:47,854 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-06-04 21:41:47,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:47,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442648266] [2021-06-04 21:41:47,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:47,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442648266] [2021-06-04 21:41:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442648266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703487038] [2021-06-04 21:41:47,925 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 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 [2021-06-04 21:41:47,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:47,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703487038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:48,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:48,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075241593] [2021-06-04 21:41:48,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:48,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:48,069 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) [2021-06-04 21:41:48,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:48,383 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-04 21:41:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:48,384 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 [2021-06-04 21:41:48,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:48,386 INFO L225 Difference]: With dead ends: 3144 [2021-06-04 21:41:48,386 INFO L226 Difference]: Without dead ends: 2521 [2021-06-04 21:41:48,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 257.5ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:41:48,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-04 21:41:48,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-04 21:41:48,409 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) [2021-06-04 21:41:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-04 21:41:48,412 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-04 21:41:48,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:48,412 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-04 21:41:48,412 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) [2021-06-04 21:41:48,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-04 21:41:48,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:48,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:48,414 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] [2021-06-04 21:41:48,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-04 21:41:48,630 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:48,630 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-06-04 21:41:48,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:48,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127663089] [2021-06-04 21:41:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:48,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127663089] [2021-06-04 21:41:48,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127663089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289438645] [2021-06-04 21:41:48,706 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 [2021-06-04 21:41:48,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-04 21:41:48,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:48,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:48,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289438645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:48,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:48,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-04 21:41:48,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046793379] [2021-06-04 21:41:48,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-04 21:41:48,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-04 21:41:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-04 21:41:48,851 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) [2021-06-04 21:41:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:49,093 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-04 21:41:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:49,094 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 [2021-06-04 21:41:49,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:49,097 INFO L225 Difference]: With dead ends: 3348 [2021-06-04 21:41:49,097 INFO L226 Difference]: Without dead ends: 3078 [2021-06-04 21:41:49,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:41:49,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-04 21:41:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-04 21:41:49,123 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) [2021-06-04 21:41:49,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-04 21:41:49,125 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-04 21:41:49,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:49,125 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-04 21:41:49,125 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) [2021-06-04 21:41:49,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-04 21:41:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-04 21:41:49,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:49,127 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] [2021-06-04 21:41:49,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:49,344 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-06-04 21:41:49,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:49,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225173240] [2021-06-04 21:41:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:49,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225173240] [2021-06-04 21:41:49,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225173240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239305152] [2021-06-04 21:41:49,412 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 [2021-06-04 21:41:49,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:49,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:49,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-04 21:41:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:49,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239305152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:49,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:49,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-04 21:41:49,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180890187] [2021-06-04 21:41:49,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:49,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:49,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:49,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:49,567 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) [2021-06-04 21:41:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:49,878 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-04 21:41:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:41:49,878 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 [2021-06-04 21:41:49,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:49,881 INFO L225 Difference]: With dead ends: 3216 [2021-06-04 21:41:49,881 INFO L226 Difference]: Without dead ends: 2641 [2021-06-04 21:41:49,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-04 21:41:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-04 21:41:49,901 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) [2021-06-04 21:41:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-04 21:41:49,902 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-04 21:41:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:49,903 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-04 21:41:49,903 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) [2021-06-04 21:41:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-04 21:41:49,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:49,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:49,905 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] [2021-06-04 21:41:50,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-04 21:41:50,106 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:50,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:50,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-06-04 21:41:50,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:50,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639069804] [2021-06-04 21:41:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:50,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639069804] [2021-06-04 21:41:50,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639069804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772569702] [2021-06-04 21:41:50,211 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 [2021-06-04 21:41:50,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772569702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-04 21:41:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938025403] [2021-06-04 21:41:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:41:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:50,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:41:50,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:41:50,397 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) [2021-06-04 21:41:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:50,622 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-04 21:41:50,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:50,622 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 [2021-06-04 21:41:50,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:50,625 INFO L225 Difference]: With dead ends: 2364 [2021-06-04 21:41:50,625 INFO L226 Difference]: Without dead ends: 2030 [2021-06-04 21:41:50,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-04 21:41:50,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-04 21:41:50,641 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) [2021-06-04 21:41:50,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-04 21:41:50,643 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-04 21:41:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:50,643 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-04 21:41:50,643 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) [2021-06-04 21:41:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-04 21:41:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:50,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:50,645 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] [2021-06-04 21:41:50,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:50,861 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:50,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:50,861 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-06-04 21:41:50,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:50,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654357544] [2021-06-04 21:41:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:50,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:50,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654357544] [2021-06-04 21:41:50,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654357544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:50,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45069843] [2021-06-04 21:41:50,945 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 [2021-06-04 21:41:51,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:51,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:51,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:51,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45069843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:51,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:51,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:51,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199684269] [2021-06-04 21:41:51,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:51,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:51,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:51,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:51,102 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) [2021-06-04 21:41:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:51,239 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-04 21:41:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-04 21:41:51,239 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 [2021-06-04 21:41:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:51,241 INFO L225 Difference]: With dead ends: 2686 [2021-06-04 21:41:51,241 INFO L226 Difference]: Without dead ends: 2416 [2021-06-04 21:41:51,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:41:51,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-04 21:41:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-04 21:41:51,259 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) [2021-06-04 21:41:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-04 21:41:51,261 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-04 21:41:51,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:51,261 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-04 21:41:51,261 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) [2021-06-04 21:41:51,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-04 21:41:51,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:51,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:51,263 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] [2021-06-04 21:41:51,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-04 21:41:51,463 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:51,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-06-04 21:41:51,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:51,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293820865] [2021-06-04 21:41:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:51,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:51,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293820865] [2021-06-04 21:41:51,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293820865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:51,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795376415] [2021-06-04 21:41:51,547 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 [2021-06-04 21:41:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:51,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:51,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:51,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795376415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:51,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:51,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:51,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146475447] [2021-06-04 21:41:51,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:51,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:51,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:51,701 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) [2021-06-04 21:41:51,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:51,937 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-04 21:41:51,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:51,938 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 [2021-06-04 21:41:51,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:51,940 INFO L225 Difference]: With dead ends: 2646 [2021-06-04 21:41:51,940 INFO L226 Difference]: Without dead ends: 2376 [2021-06-04 21:41:51,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-04 21:41:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-04 21:41:51,956 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) [2021-06-04 21:41:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-04 21:41:51,959 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-04 21:41:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:51,959 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-04 21:41:51,959 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) [2021-06-04 21:41:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-04 21:41:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:51,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:51,964 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] [2021-06-04 21:41:52,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:52,181 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:52,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:52,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-06-04 21:41:52,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:52,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837522260] [2021-06-04 21:41:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837522260] [2021-06-04 21:41:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837522260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854128038] [2021-06-04 21:41:52,335 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 [2021-06-04 21:41:52,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:52,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:52,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:52,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854128038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:52,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089185168] [2021-06-04 21:41:52,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:52,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:52,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:52,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:52,480 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) [2021-06-04 21:41:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:52,641 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-04 21:41:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-04 21:41:52,641 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 [2021-06-04 21:41:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:52,644 INFO L225 Difference]: With dead ends: 2696 [2021-06-04 21:41:52,644 INFO L226 Difference]: Without dead ends: 2426 [2021-06-04 21:41:52,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:41:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-04 21:41:52,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-04 21:41:52,662 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) [2021-06-04 21:41:52,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-04 21:41:52,664 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-04 21:41:52,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:52,664 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-04 21:41:52,664 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) [2021-06-04 21:41:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-04 21:41:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:52,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:52,666 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] [2021-06-04 21:41:52,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-04 21:41:52,882 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:52,882 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-06-04 21:41:52,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:52,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397914989] [2021-06-04 21:41:52,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:52,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:52,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:52,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397914989] [2021-06-04 21:41:52,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397914989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:52,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475971049] [2021-06-04 21:41:52,967 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 [2021-06-04 21:41:53,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:41:53,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:53,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:41:53,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475971049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:53,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:53,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392748239] [2021-06-04 21:41:53,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:53,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:53,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:53,109 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) [2021-06-04 21:41:53,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:53,326 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-04 21:41:53,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:53,326 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 [2021-06-04 21:41:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:53,329 INFO L225 Difference]: With dead ends: 2721 [2021-06-04 21:41:53,329 INFO L226 Difference]: Without dead ends: 2451 [2021-06-04 21:41:53,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:53,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-04 21:41:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-04 21:41:53,348 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) [2021-06-04 21:41:53,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-04 21:41:53,351 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-04 21:41:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:53,351 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-04 21:41:53,351 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) [2021-06-04 21:41:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-04 21:41:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:53,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:53,353 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] [2021-06-04 21:41:53,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:53,569 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:53,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:53,570 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-06-04 21:41:53,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:53,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293939234] [2021-06-04 21:41:53,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293939234] [2021-06-04 21:41:53,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293939234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647498471] [2021-06-04 21:41:53,653 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 [2021-06-04 21:41:53,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:53,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:53,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:53,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647498471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:53,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:53,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687374587] [2021-06-04 21:41:53,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:53,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:53,819 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) [2021-06-04 21:41:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:54,032 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-04 21:41:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:41:54,032 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 [2021-06-04 21:41:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:54,035 INFO L225 Difference]: With dead ends: 2791 [2021-06-04 21:41:54,035 INFO L226 Difference]: Without dead ends: 2521 [2021-06-04 21:41:54,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 180.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:41:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-04 21:41:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-04 21:41:54,054 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) [2021-06-04 21:41:54,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-04 21:41:54,057 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-04 21:41:54,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:54,057 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-04 21:41:54,057 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) [2021-06-04 21:41:54,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-04 21:41:54,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:54,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:54,059 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] [2021-06-04 21:41:54,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-04 21:41:54,260 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:54,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:54,260 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-06-04 21:41:54,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:54,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350616231] [2021-06-04 21:41:54,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:54,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350616231] [2021-06-04 21:41:54,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350616231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:54,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118376315] [2021-06-04 21:41:54,335 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 [2021-06-04 21:41:54,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:54,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:54,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118376315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:54,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:54,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:54,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873494663] [2021-06-04 21:41:54,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:54,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:54,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:54,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:54,485 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) [2021-06-04 21:41:54,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:54,822 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-04 21:41:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:41:54,822 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 [2021-06-04 21:41:54,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:54,825 INFO L225 Difference]: With dead ends: 3369 [2021-06-04 21:41:54,825 INFO L226 Difference]: Without dead ends: 2746 [2021-06-04 21:41:54,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:41:54,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-04 21:41:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-04 21:41:54,845 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) [2021-06-04 21:41:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-04 21:41:54,848 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-04 21:41:54,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:54,848 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-04 21:41:54,848 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) [2021-06-04 21:41:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-04 21:41:54,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:54,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:54,850 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] [2021-06-04 21:41:55,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-04 21:41:55,059 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-06-04 21:41:55,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:55,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235194998] [2021-06-04 21:41:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:55,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235194998] [2021-06-04 21:41:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235194998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208215559] [2021-06-04 21:41:55,128 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 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 [2021-06-04 21:41:55,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:55,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:55,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:55,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208215559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:55,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-04 21:41:55,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378217136] [2021-06-04 21:41:55,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:55,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:55,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:55,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:55,294 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) [2021-06-04 21:41:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:55,552 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-04 21:41:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:55,553 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 [2021-06-04 21:41:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:55,556 INFO L225 Difference]: With dead ends: 3598 [2021-06-04 21:41:55,556 INFO L226 Difference]: Without dead ends: 3328 [2021-06-04 21:41:55,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-04 21:41:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-04 21:41:55,586 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) [2021-06-04 21:41:55,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-04 21:41:55,590 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-04 21:41:55,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:55,594 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-04 21:41:55,594 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) [2021-06-04 21:41:55,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-04 21:41:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-04 21:41:55,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:55,596 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] [2021-06-04 21:41:55,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-04 21:41:55,813 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:55,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:55,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-06-04 21:41:55,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:55,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163536065] [2021-06-04 21:41:55,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:55,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:55,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163536065] [2021-06-04 21:41:55,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163536065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:55,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60086435] [2021-06-04 21:41:55,903 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 [2021-06-04 21:41:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:55,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-04 21:41:55,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60086435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:56,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-04 21:41:56,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024757381] [2021-06-04 21:41:56,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:56,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:56,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:56,068 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) [2021-06-04 21:41:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:56,442 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-04 21:41:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:41:56,443 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 [2021-06-04 21:41:56,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:56,445 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:41:56,446 INFO L226 Difference]: Without dead ends: 2846 [2021-06-04 21:41:56,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 347.1ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:41:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-04 21:41:56,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-04 21:41:56,466 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) [2021-06-04 21:41:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-04 21:41:56,468 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-04 21:41:56,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:56,468 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-04 21:41:56,468 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) [2021-06-04 21:41:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-04 21:41:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:56,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:56,469 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] [2021-06-04 21:41:56,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-04 21:41:56,670 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:56,670 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-06-04 21:41:56,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:56,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312074529] [2021-06-04 21:41:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:56,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312074529] [2021-06-04 21:41:56,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312074529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628388930] [2021-06-04 21:41:56,748 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 [2021-06-04 21:41:56,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:41:56,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:56,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:56,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628388930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:56,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:56,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:41:56,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892344173] [2021-06-04 21:41:56,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:56,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:56,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:56,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:56,888 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:57,070 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-04 21:41:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:41:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:41:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:57,073 INFO L225 Difference]: With dead ends: 2621 [2021-06-04 21:41:57,073 INFO L226 Difference]: Without dead ends: 2351 [2021-06-04 21:41:57,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:41:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-04 21:41:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-04 21:41:57,092 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) [2021-06-04 21:41:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-04 21:41:57,095 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-04 21:41:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:57,095 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-04 21:41:57,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-04 21:41:57,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:57,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:57,097 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] [2021-06-04 21:41:57,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:57,312 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:57,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:57,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-06-04 21:41:57,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:57,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434475051] [2021-06-04 21:41:57,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434475051] [2021-06-04 21:41:57,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434475051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918694091] [2021-06-04 21:41:57,423 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 [2021-06-04 21:41:57,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:41:57,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:57,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:57,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918694091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:57,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:57,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:57,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471557658] [2021-06-04 21:41:57,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:57,580 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 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) [2021-06-04 21:41:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:57,813 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-04 21:41:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:41:57,813 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 [2021-06-04 21:41:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:57,815 INFO L225 Difference]: With dead ends: 2841 [2021-06-04 21:41:57,815 INFO L226 Difference]: Without dead ends: 2571 [2021-06-04 21:41:57,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-04 21:41:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-04 21:41:57,835 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) [2021-06-04 21:41:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-04 21:41:57,837 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-04 21:41:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:57,837 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-04 21:41:57,837 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) [2021-06-04 21:41:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-04 21:41:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:57,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:57,839 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] [2021-06-04 21:41:58,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-04 21:41:58,040 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:58,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:58,040 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-06-04 21:41:58,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:58,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339133844] [2021-06-04 21:41:58,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:58,126 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339133844] [2021-06-04 21:41:58,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339133844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056611575] [2021-06-04 21:41:58,127 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 [2021-06-04 21:41:58,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:41:58,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:58,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:58,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056611575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:58,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:41:58,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507202244] [2021-06-04 21:41:58,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:58,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:58,289 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:58,493 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-04 21:41:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:41:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:41:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:58,495 INFO L225 Difference]: With dead ends: 2871 [2021-06-04 21:41:58,495 INFO L226 Difference]: Without dead ends: 2601 [2021-06-04 21:41:58,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 189.7ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:41:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-04 21:41:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-04 21:41:58,515 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) [2021-06-04 21:41:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-04 21:41:58,517 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-04 21:41:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:58,517 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-04 21:41:58,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-04 21:41:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:58,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:58,519 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] [2021-06-04 21:41:58,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-04 21:41:58,733 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:58,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-06-04 21:41:58,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:58,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938866478] [2021-06-04 21:41:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:58,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938866478] [2021-06-04 21:41:58,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938866478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300523653] [2021-06-04 21:41:58,808 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 [2021-06-04 21:41:58,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-04 21:41:58,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:58,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300523653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:58,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:58,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:41:58,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874529288] [2021-06-04 21:41:58,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:41:58,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:41:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:41:58,956 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 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) [2021-06-04 21:41:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:59,237 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-04 21:41:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:41:59,237 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 [2021-06-04 21:41:59,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:59,240 INFO L225 Difference]: With dead ends: 2896 [2021-06-04 21:41:59,240 INFO L226 Difference]: Without dead ends: 2626 [2021-06-04 21:41:59,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-04 21:41:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-04 21:41:59,258 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) [2021-06-04 21:41:59,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-04 21:41:59,261 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-04 21:41:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:59,261 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-04 21:41:59,261 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) [2021-06-04 21:41:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-04 21:41:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:59,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:59,263 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] [2021-06-04 21:41:59,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:41:59,463 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:41:59,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:41:59,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-06-04 21:41:59,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:41:59,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931042223] [2021-06-04 21:41:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:41:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:41:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:59,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:41:59,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931042223] [2021-06-04 21:41:59,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931042223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:59,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593955103] [2021-06-04 21:41:59,532 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 [2021-06-04 21:41:59,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-04 21:41:59,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:41:59,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:41:59,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:41:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:41:59,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593955103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:41:59,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:41:59,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:41:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427272602] [2021-06-04 21:41:59,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:41:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:41:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:41:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:41:59,668 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:41:59,886 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-04 21:41:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:41:59,886 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:41:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:41:59,889 INFO L225 Difference]: With dead ends: 2966 [2021-06-04 21:41:59,889 INFO L226 Difference]: Without dead ends: 2696 [2021-06-04 21:41:59,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:41:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-04 21:41:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-04 21:41:59,909 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) [2021-06-04 21:41:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-04 21:41:59,911 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-04 21:41:59,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:41:59,912 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-04 21:41:59,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:41:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-04 21:41:59,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:41:59,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:41:59,914 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] [2021-06-04 21:42:00,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-04 21:42:00,114 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:00,115 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-06-04 21:42:00,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:00,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691688648] [2021-06-04 21:42:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:00,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:00,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691688648] [2021-06-04 21:42:00,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691688648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:00,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891703370] [2021-06-04 21:42:00,189 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 [2021-06-04 21:42:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:00,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-04 21:42:00,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891703370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-04 21:42:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535535522] [2021-06-04 21:42:00,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-04 21:42:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-04 21:42:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-04 21:42:00,335 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 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) [2021-06-04 21:42:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:00,687 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-04 21:42:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:00,687 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 [2021-06-04 21:42:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:00,690 INFO L225 Difference]: With dead ends: 3544 [2021-06-04 21:42:00,690 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:42:00,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:42:00,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:42:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-04 21:42:00,718 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) [2021-06-04 21:42:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-04 21:42:00,721 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-04 21:42:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:00,721 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-04 21:42:00,722 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) [2021-06-04 21:42:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-04 21:42:00,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:42:00,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:00,724 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] [2021-06-04 21:42:00,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:00,940 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:00,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:00,940 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-06-04 21:42:00,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:00,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906404000] [2021-06-04 21:42:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906404000] [2021-06-04 21:42:01,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906404000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396912013] [2021-06-04 21:42:01,022 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 [2021-06-04 21:42:01,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:01,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:01,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396912013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:01,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-04 21:42:01,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909321359] [2021-06-04 21:42:01,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-04 21:42:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-04 21:42:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-04 21:42:01,153 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:01,423 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-04 21:42:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:42:01,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:01,427 INFO L225 Difference]: With dead ends: 3748 [2021-06-04 21:42:01,427 INFO L226 Difference]: Without dead ends: 3478 [2021-06-04 21:42:01,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 236.6ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:42:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-04 21:42:01,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-04 21:42:01,450 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) [2021-06-04 21:42:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-04 21:42:01,453 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-04 21:42:01,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:01,453 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-04 21:42:01,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:42:01,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-04 21:42:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-04 21:42:01,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:01,455 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] [2021-06-04 21:42:01,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-04 21:42:01,656 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-06-04 21:42:01,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:01,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506414213] [2021-06-04 21:42:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:01,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506414213] [2021-06-04 21:42:01,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506414213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619393342] [2021-06-04 21:42:01,734 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 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 [2021-06-04 21:42:01,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-04 21:42:01,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:01,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:01,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619393342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:01,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:01,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-04 21:42:01,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981709811] [2021-06-04 21:42:01,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:01,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:01,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:01,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:01,887 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) [2021-06-04 21:42:02,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:02,324 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-04 21:42:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:02,325 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 [2021-06-04 21:42:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:02,328 INFO L225 Difference]: With dead ends: 3616 [2021-06-04 21:42:02,328 INFO L226 Difference]: Without dead ends: 3041 [2021-06-04 21:42:02,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 381.9ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-04 21:42:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-04 21:42:02,345 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) [2021-06-04 21:42:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-04 21:42:02,347 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-04 21:42:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:02,347 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-04 21:42:02,347 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) [2021-06-04 21:42:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-04 21:42:02,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:02,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:02,349 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] [2021-06-04 21:42:02,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:02,549 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:02,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:02,550 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-06-04 21:42:02,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:02,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943559860] [2021-06-04 21:42:02,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:02,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943559860] [2021-06-04 21:42:02,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943559860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553945132] [2021-06-04 21:42:02,660 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 [2021-06-04 21:42:02,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:02,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:02,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:02,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:02,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553945132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:02,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:02,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-04 21:42:02,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681951274] [2021-06-04 21:42:02,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:02,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:02,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:02,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:02,858 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) [2021-06-04 21:42:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:03,126 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-04 21:42:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:42:03,126 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 [2021-06-04 21:42:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:03,129 INFO L225 Difference]: With dead ends: 2614 [2021-06-04 21:42:03,129 INFO L226 Difference]: Without dead ends: 2280 [2021-06-04 21:42:03,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:42:03,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-04 21:42:03,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-04 21:42:03,146 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) [2021-06-04 21:42:03,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-04 21:42:03,148 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-04 21:42:03,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:03,148 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-04 21:42:03,148 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) [2021-06-04 21:42:03,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-04 21:42:03,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:03,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:03,150 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] [2021-06-04 21:42:03,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-04 21:42:03,350 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-06-04 21:42:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:03,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285820495] [2021-06-04 21:42:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:03,490 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:03,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285820495] [2021-06-04 21:42:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285820495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286974113] [2021-06-04 21:42:03,490 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 [2021-06-04 21:42:03,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:42:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:03,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286974113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:03,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:03,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:42:03,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213143207] [2021-06-04 21:42:03,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:03,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:03,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:03,652 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) [2021-06-04 21:42:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:03,826 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-04 21:42:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-04 21:42:03,826 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 [2021-06-04 21:42:03,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:03,828 INFO L225 Difference]: With dead ends: 3036 [2021-06-04 21:42:03,829 INFO L226 Difference]: Without dead ends: 2766 [2021-06-04 21:42:03,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:42:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-04 21:42:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-04 21:42:03,846 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) [2021-06-04 21:42:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-04 21:42:03,848 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-04 21:42:03,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:03,848 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-04 21:42:03,848 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) [2021-06-04 21:42:03,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-04 21:42:03,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:03,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:03,850 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] [2021-06-04 21:42:04,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-04 21:42:04,053 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:04,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:04,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-06-04 21:42:04,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:04,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361325899] [2021-06-04 21:42:04,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361325899] [2021-06-04 21:42:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361325899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432153381] [2021-06-04 21:42:04,168 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 [2021-06-04 21:42:04,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:42:04,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:04,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:04,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432153381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:04,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:42:04,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868167968] [2021-06-04 21:42:04,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:04,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:04,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:04,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:04,350 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) [2021-06-04 21:42:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:04,587 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-04 21:42:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:42:04,588 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 [2021-06-04 21:42:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:04,590 INFO L225 Difference]: With dead ends: 2996 [2021-06-04 21:42:04,590 INFO L226 Difference]: Without dead ends: 2726 [2021-06-04 21:42:04,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:42:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-04 21:42:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-04 21:42:04,608 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) [2021-06-04 21:42:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-04 21:42:04,610 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-04 21:42:04,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:04,611 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-04 21:42:04,611 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) [2021-06-04 21:42:04,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-04 21:42:04,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:04,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:04,612 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] [2021-06-04 21:42:04,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:04,813 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-06-04 21:42:04,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:04,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774252378] [2021-06-04 21:42:04,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:04,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:04,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774252378] [2021-06-04 21:42:04,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774252378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:04,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924324692] [2021-06-04 21:42:04,897 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 [2021-06-04 21:42:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:04,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:04,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:05,061 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924324692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:05,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:42:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44486402] [2021-06-04 21:42:05,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:05,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:05,062 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) [2021-06-04 21:42:05,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:05,294 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-04 21:42:05,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-04 21:42:05,295 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 [2021-06-04 21:42:05,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:05,297 INFO L225 Difference]: With dead ends: 3046 [2021-06-04 21:42:05,297 INFO L226 Difference]: Without dead ends: 2776 [2021-06-04 21:42:05,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:42:05,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-04 21:42:05,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-04 21:42:05,316 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) [2021-06-04 21:42:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-04 21:42:05,318 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-04 21:42:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:05,319 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-04 21:42:05,319 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) [2021-06-04 21:42:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-04 21:42:05,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:05,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:05,320 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] [2021-06-04 21:42:05,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-04 21:42:05,521 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:05,525 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-06-04 21:42:05,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:05,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991711623] [2021-06-04 21:42:05,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991711623] [2021-06-04 21:42:05,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991711623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435739370] [2021-06-04 21:42:05,631 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 [2021-06-04 21:42:05,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:05,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:05,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:05,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435739370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:05,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:05,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:42:05,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420289985] [2021-06-04 21:42:05,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:05,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:05,828 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) [2021-06-04 21:42:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:06,104 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-04 21:42:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:06,105 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 [2021-06-04 21:42:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:06,107 INFO L225 Difference]: With dead ends: 3071 [2021-06-04 21:42:06,107 INFO L226 Difference]: Without dead ends: 2801 [2021-06-04 21:42:06,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:42:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-04 21:42:06,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-04 21:42:06,126 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) [2021-06-04 21:42:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-04 21:42:06,129 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-04 21:42:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:06,129 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-04 21:42:06,129 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) [2021-06-04 21:42:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-04 21:42:06,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:06,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:06,131 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] [2021-06-04 21:42:06,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:06,345 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-06-04 21:42:06,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:06,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360397769] [2021-06-04 21:42:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360397769] [2021-06-04 21:42:06,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360397769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974021563] [2021-06-04 21:42:06,433 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 [2021-06-04 21:42:06,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:42:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:06,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974021563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:06,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:06,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:42:06,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146480468] [2021-06-04 21:42:06,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:06,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:06,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:06,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:06,589 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) [2021-06-04 21:42:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:06,827 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-04 21:42:06,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:42:06,827 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 [2021-06-04 21:42:06,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:06,830 INFO L225 Difference]: With dead ends: 3096 [2021-06-04 21:42:06,830 INFO L226 Difference]: Without dead ends: 2826 [2021-06-04 21:42:06,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:42:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-04 21:42:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-04 21:42:06,851 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) [2021-06-04 21:42:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-04 21:42:06,853 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-04 21:42:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:06,853 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-04 21:42:06,853 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) [2021-06-04 21:42:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-04 21:42:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:06,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:06,855 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] [2021-06-04 21:42:07,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:07,056 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-06-04 21:42:07,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:07,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034640945] [2021-06-04 21:42:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:07,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034640945] [2021-06-04 21:42:07,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034640945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:07,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791961249] [2021-06-04 21:42:07,176 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 [2021-06-04 21:42:07,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:07,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:07,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:07,368 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:07,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791961249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:07,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:07,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:42:07,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240196800] [2021-06-04 21:42:07,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:07,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:07,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:07,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:07,369 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) [2021-06-04 21:42:07,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:07,707 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-04 21:42:07,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:07,707 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 [2021-06-04 21:42:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:07,709 INFO L225 Difference]: With dead ends: 3121 [2021-06-04 21:42:07,709 INFO L226 Difference]: Without dead ends: 2851 [2021-06-04 21:42:07,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:42:07,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-04 21:42:07,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-04 21:42:07,731 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) [2021-06-04 21:42:07,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-04 21:42:07,734 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-04 21:42:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:07,734 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-04 21:42:07,734 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) [2021-06-04 21:42:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-04 21:42:07,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:07,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:07,736 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] [2021-06-04 21:42:07,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-04 21:42:07,936 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:07,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:07,936 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-06-04 21:42:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:07,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426539317] [2021-06-04 21:42:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:08,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426539317] [2021-06-04 21:42:08,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426539317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957881796] [2021-06-04 21:42:08,020 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 [2021-06-04 21:42:08,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:42:08,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:08,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:08,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957881796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:08,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:42:08,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566360649] [2021-06-04 21:42:08,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:08,174 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) [2021-06-04 21:42:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:08,455 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-04 21:42:08,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:08,455 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 [2021-06-04 21:42:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:08,458 INFO L225 Difference]: With dead ends: 3191 [2021-06-04 21:42:08,458 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:42:08,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:42:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:42:08,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-04 21:42:08,480 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) [2021-06-04 21:42:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-04 21:42:08,482 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-04 21:42:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:08,483 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-04 21:42:08,483 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) [2021-06-04 21:42:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-04 21:42:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:08,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:08,484 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] [2021-06-04 21:42:08,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:08,685 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-06-04 21:42:08,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:08,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255961735] [2021-06-04 21:42:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255961735] [2021-06-04 21:42:08,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255961735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413535875] [2021-06-04 21:42:08,775 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 [2021-06-04 21:42:08,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:42:08,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:08,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:08,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:08,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413535875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:08,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:08,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:42:08,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726981757] [2021-06-04 21:42:08,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:08,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:08,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:08,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:08,947 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) [2021-06-04 21:42:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:09,326 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-04 21:42:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:09,326 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 [2021-06-04 21:42:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:09,329 INFO L225 Difference]: With dead ends: 3769 [2021-06-04 21:42:09,330 INFO L226 Difference]: Without dead ends: 3146 [2021-06-04 21:42:09,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1144, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:42:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-04 21:42:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-04 21:42:09,349 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) [2021-06-04 21:42:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-04 21:42:09,352 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-04 21:42:09,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:09,352 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-04 21:42:09,353 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) [2021-06-04 21:42:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-04 21:42:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:09,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:09,354 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] [2021-06-04 21:42:09,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-04 21:42:09,555 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:09,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-06-04 21:42:09,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:09,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537998732] [2021-06-04 21:42:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:09,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537998732] [2021-06-04 21:42:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537998732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485757612] [2021-06-04 21:42:09,634 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 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 [2021-06-04 21:42:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-04 21:42:09,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:09,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485757612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:09,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:09,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-04 21:42:09,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333571002] [2021-06-04 21:42:09,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-04 21:42:09,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:09,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-04 21:42:09,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-04 21:42:09,786 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) [2021-06-04 21:42:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:10,105 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-04 21:42:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:10,105 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 [2021-06-04 21:42:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:10,109 INFO L225 Difference]: With dead ends: 3998 [2021-06-04 21:42:10,109 INFO L226 Difference]: Without dead ends: 3728 [2021-06-04 21:42:10,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:42:10,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-04 21:42:10,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-04 21:42:10,136 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) [2021-06-04 21:42:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-04 21:42:10,139 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-04 21:42:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:10,139 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-04 21:42:10,139 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) [2021-06-04 21:42:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-04 21:42:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-04 21:42:10,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:10,141 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] [2021-06-04 21:42:10,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-04 21:42:10,341 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:10,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-06-04 21:42:10,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:10,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149125626] [2021-06-04 21:42:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:10,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:10,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149125626] [2021-06-04 21:42:10,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149125626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:10,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034474264] [2021-06-04 21:42:10,414 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 [2021-06-04 21:42:10,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:10,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:10,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034474264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:10,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:10,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-04 21:42:10,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58513615] [2021-06-04 21:42:10,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:10,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:10,569 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) [2021-06-04 21:42:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:10,983 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-04 21:42:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:10,983 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 [2021-06-04 21:42:10,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:10,987 INFO L225 Difference]: With dead ends: 3821 [2021-06-04 21:42:10,987 INFO L226 Difference]: Without dead ends: 3246 [2021-06-04 21:42:10,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 369.8ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:10,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-04 21:42:11,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-04 21:42:11,009 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) [2021-06-04 21:42:11,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-04 21:42:11,011 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-04 21:42:11,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:11,011 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-04 21:42:11,011 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) [2021-06-04 21:42:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-04 21:42:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:11,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:11,013 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] [2021-06-04 21:42:11,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-04 21:42:11,229 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-06-04 21:42:11,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:11,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834266343] [2021-06-04 21:42:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:11,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834266343] [2021-06-04 21:42:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834266343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394617204] [2021-06-04 21:42:11,333 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 [2021-06-04 21:42:11,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:42:11,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:11,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:11,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394617204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:11,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:11,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:42:11,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100735115] [2021-06-04 21:42:11,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:11,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:11,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:11,502 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) [2021-06-04 21:42:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:11,729 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-04 21:42:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:42:11,729 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 [2021-06-04 21:42:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:11,732 INFO L225 Difference]: With dead ends: 2921 [2021-06-04 21:42:11,732 INFO L226 Difference]: Without dead ends: 2651 [2021-06-04 21:42:11,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:42:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-04 21:42:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-04 21:42:11,749 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) [2021-06-04 21:42:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-04 21:42:11,751 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-04 21:42:11,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:11,751 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-04 21:42:11,751 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) [2021-06-04 21:42:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-04 21:42:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:11,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:11,753 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] [2021-06-04 21:42:11,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-04 21:42:11,953 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-06-04 21:42:11,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:11,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781894852] [2021-06-04 21:42:11,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781894852] [2021-06-04 21:42:12,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781894852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533257829] [2021-06-04 21:42:12,061 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 [2021-06-04 21:42:12,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:12,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:12,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533257829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:12,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:42:12,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35796324] [2021-06-04 21:42:12,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:12,236 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) [2021-06-04 21:42:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:12,541 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-04 21:42:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:12,542 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 [2021-06-04 21:42:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:12,544 INFO L225 Difference]: With dead ends: 3191 [2021-06-04 21:42:12,544 INFO L226 Difference]: Without dead ends: 2921 [2021-06-04 21:42:12,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 292.0ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:12,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-04 21:42:12,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-04 21:42:12,563 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) [2021-06-04 21:42:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-04 21:42:12,565 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-04 21:42:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:12,565 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-04 21:42:12,565 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) [2021-06-04 21:42:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-04 21:42:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:12,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:12,567 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] [2021-06-04 21:42:12,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:12,768 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-06-04 21:42:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:12,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885748359] [2021-06-04 21:42:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:12,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:12,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885748359] [2021-06-04 21:42:12,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885748359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:12,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241755917] [2021-06-04 21:42:12,862 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 [2021-06-04 21:42:12,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:42:12,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241755917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:13,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:42:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897923772] [2021-06-04 21:42:13,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:13,040 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) [2021-06-04 21:42:13,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:13,284 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-04 21:42:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:13,284 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 [2021-06-04 21:42:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:13,287 INFO L225 Difference]: With dead ends: 3221 [2021-06-04 21:42:13,287 INFO L226 Difference]: Without dead ends: 2951 [2021-06-04 21:42:13,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:13,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-04 21:42:13,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-04 21:42:13,307 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) [2021-06-04 21:42:13,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-04 21:42:13,310 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-04 21:42:13,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:13,310 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-04 21:42:13,310 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) [2021-06-04 21:42:13,310 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-04 21:42:13,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:13,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:13,312 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] [2021-06-04 21:42:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:13,512 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-06-04 21:42:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:13,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595820813] [2021-06-04 21:42:13,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:13,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595820813] [2021-06-04 21:42:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595820813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908541876] [2021-06-04 21:42:13,613 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 [2021-06-04 21:42:13,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:42:13,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:13,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:13,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908541876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:13,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:13,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:42:13,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665520510] [2021-06-04 21:42:13,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:13,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:13,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:13,796 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) [2021-06-04 21:42:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:14,116 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-04 21:42:14,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:14,116 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 [2021-06-04 21:42:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:14,119 INFO L225 Difference]: With dead ends: 3246 [2021-06-04 21:42:14,119 INFO L226 Difference]: Without dead ends: 2976 [2021-06-04 21:42:14,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 310.8ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-04 21:42:14,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-04 21:42:14,140 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) [2021-06-04 21:42:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-04 21:42:14,143 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-04 21:42:14,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:14,143 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-04 21:42:14,143 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) [2021-06-04 21:42:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-04 21:42:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:14,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:14,145 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] [2021-06-04 21:42:14,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:14,345 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-06-04 21:42:14,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:14,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029444369] [2021-06-04 21:42:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029444369] [2021-06-04 21:42:14,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029444369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516017251] [2021-06-04 21:42:14,432 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 [2021-06-04 21:42:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:14,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:14,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516017251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:14,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:14,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:42:14,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039560228] [2021-06-04 21:42:14,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:14,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:14,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:14,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:14,606 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) [2021-06-04 21:42:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:14,876 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-04 21:42:14,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:14,876 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 [2021-06-04 21:42:14,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:14,879 INFO L225 Difference]: With dead ends: 3271 [2021-06-04 21:42:14,879 INFO L226 Difference]: Without dead ends: 3001 [2021-06-04 21:42:14,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 249.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:14,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-04 21:42:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-04 21:42:14,899 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) [2021-06-04 21:42:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-04 21:42:14,902 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-04 21:42:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:14,902 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-04 21:42:14,902 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) [2021-06-04 21:42:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-04 21:42:14,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:14,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:14,904 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] [2021-06-04 21:42:15,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-04 21:42:15,105 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:15,119 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-06-04 21:42:15,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:15,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616404453] [2021-06-04 21:42:15,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616404453] [2021-06-04 21:42:15,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616404453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259062789] [2021-06-04 21:42:15,216 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 [2021-06-04 21:42:15,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:15,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:15,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:15,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259062789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:15,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:15,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:42:15,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110661015] [2021-06-04 21:42:15,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:15,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:15,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:15,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:15,386 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) [2021-06-04 21:42:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:15,742 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-04 21:42:15,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:15,742 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 [2021-06-04 21:42:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:15,745 INFO L225 Difference]: With dead ends: 3296 [2021-06-04 21:42:15,745 INFO L226 Difference]: Without dead ends: 3026 [2021-06-04 21:42:15,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-04 21:42:15,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-04 21:42:15,766 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) [2021-06-04 21:42:15,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-04 21:42:15,769 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-04 21:42:15,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:15,769 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-04 21:42:15,769 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) [2021-06-04 21:42:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-04 21:42:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:15,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:15,771 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] [2021-06-04 21:42:15,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:15,971 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:15,971 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-06-04 21:42:15,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:15,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89761040] [2021-06-04 21:42:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:16,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89761040] [2021-06-04 21:42:16,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89761040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134947853] [2021-06-04 21:42:16,060 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 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 [2021-06-04 21:42:16,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-04 21:42:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:16,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:16,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134947853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:16,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:42:16,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952349377] [2021-06-04 21:42:16,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:16,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:16,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:16,214 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) [2021-06-04 21:42:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:16,511 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-04 21:42:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:16,511 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 [2021-06-04 21:42:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:16,514 INFO L225 Difference]: With dead ends: 3366 [2021-06-04 21:42:16,514 INFO L226 Difference]: Without dead ends: 3096 [2021-06-04 21:42:16,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-04 21:42:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-04 21:42:16,538 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) [2021-06-04 21:42:16,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-04 21:42:16,541 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-04 21:42:16,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:16,541 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-04 21:42:16,541 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) [2021-06-04 21:42:16,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-04 21:42:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:16,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:16,543 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] [2021-06-04 21:42:16,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-04 21:42:16,744 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:16,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:16,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-06-04 21:42:16,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:16,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873096011] [2021-06-04 21:42:16,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:16,834 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:16,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873096011] [2021-06-04 21:42:16,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873096011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302982266] [2021-06-04 21:42:16,835 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 [2021-06-04 21:42:16,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:16,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302982266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:16,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:16,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:42:16,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180984484] [2021-06-04 21:42:16,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:16,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:16,998 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) [2021-06-04 21:42:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:17,451 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-04 21:42:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:17,451 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 [2021-06-04 21:42:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:17,455 INFO L225 Difference]: With dead ends: 3944 [2021-06-04 21:42:17,455 INFO L226 Difference]: Without dead ends: 3321 [2021-06-04 21:42:17,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-04 21:42:17,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-04 21:42:17,477 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) [2021-06-04 21:42:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-04 21:42:17,480 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-04 21:42:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:17,480 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-04 21:42:17,481 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) [2021-06-04 21:42:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-04 21:42:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:17,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:17,482 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] [2021-06-04 21:42:17,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:17,683 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-06-04 21:42:17,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:17,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071551531] [2021-06-04 21:42:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:17,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:17,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071551531] [2021-06-04 21:42:17,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071551531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:17,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579736905] [2021-06-04 21:42:17,768 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 [2021-06-04 21:42:17,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-04 21:42:17,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:17,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-04 21:42:17,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:17,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579736905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:17,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:17,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-04 21:42:17,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886206206] [2021-06-04 21:42:17,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:17,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:17,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:17,923 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) [2021-06-04 21:42:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:18,254 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-04 21:42:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:18,254 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 [2021-06-04 21:42:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:18,258 INFO L225 Difference]: With dead ends: 4148 [2021-06-04 21:42:18,258 INFO L226 Difference]: Without dead ends: 3878 [2021-06-04 21:42:18,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-04 21:42:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-04 21:42:18,283 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) [2021-06-04 21:42:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-04 21:42:18,286 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-04 21:42:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:18,287 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-04 21:42:18,287 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) [2021-06-04 21:42:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-04 21:42:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-04 21:42:18,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:18,288 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] [2021-06-04 21:42:18,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-04 21:42:18,493 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:18,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-06-04 21:42:18,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:18,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005658024] [2021-06-04 21:42:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:18,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005658024] [2021-06-04 21:42:18,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005658024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701319757] [2021-06-04 21:42:18,579 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 [2021-06-04 21:42:18,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-04 21:42:18,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:18,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:18,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701319757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:18,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:18,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-04 21:42:18,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928287839] [2021-06-04 21:42:18,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:18,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:18,759 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) [2021-06-04 21:42:19,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:19,221 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-04 21:42:19,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:19,222 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 [2021-06-04 21:42:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:19,225 INFO L225 Difference]: With dead ends: 4016 [2021-06-04 21:42:19,225 INFO L226 Difference]: Without dead ends: 3441 [2021-06-04 21:42:19,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:19,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-04 21:42:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-04 21:42:19,244 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) [2021-06-04 21:42:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-04 21:42:19,246 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-04 21:42:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:19,246 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-04 21:42:19,246 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) [2021-06-04 21:42:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-04 21:42:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:19,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:19,248 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] [2021-06-04 21:42:19,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:19,450 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:19,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:19,450 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-06-04 21:42:19,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:19,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203673361] [2021-06-04 21:42:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203673361] [2021-06-04 21:42:19,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203673361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203171360] [2021-06-04 21:42:19,582 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 [2021-06-04 21:42:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203171360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:19,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:19,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-04 21:42:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713423368] [2021-06-04 21:42:19,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:19,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:19,763 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) [2021-06-04 21:42:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:20,048 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-04 21:42:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:20,048 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 [2021-06-04 21:42:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:20,050 INFO L225 Difference]: With dead ends: 2864 [2021-06-04 21:42:20,050 INFO L226 Difference]: Without dead ends: 2530 [2021-06-04 21:42:20,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-04 21:42:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-04 21:42:20,067 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) [2021-06-04 21:42:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-04 21:42:20,069 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-04 21:42:20,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:20,072 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-04 21:42:20,072 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) [2021-06-04 21:42:20,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-04 21:42:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:20,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:20,074 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] [2021-06-04 21:42:20,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-04 21:42:20,290 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:20,290 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-06-04 21:42:20,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:20,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124025777] [2021-06-04 21:42:20,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:20,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124025777] [2021-06-04 21:42:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124025777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698005066] [2021-06-04 21:42:20,432 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 [2021-06-04 21:42:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:20,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698005066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:20,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:20,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:20,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471349014] [2021-06-04 21:42:20,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:20,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:20,595 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) [2021-06-04 21:42:20,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:20,810 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-04 21:42:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-04 21:42:20,811 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 [2021-06-04 21:42:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:20,814 INFO L225 Difference]: With dead ends: 3386 [2021-06-04 21:42:20,814 INFO L226 Difference]: Without dead ends: 3116 [2021-06-04 21:42:20,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:42:20,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-04 21:42:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-04 21:42:20,834 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) [2021-06-04 21:42:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-04 21:42:20,837 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-04 21:42:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:20,837 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-04 21:42:20,837 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) [2021-06-04 21:42:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-04 21:42:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:20,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:20,839 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] [2021-06-04 21:42:21,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-04 21:42:21,041 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-06-04 21:42:21,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:21,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122311400] [2021-06-04 21:42:21,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:21,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122311400] [2021-06-04 21:42:21,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122311400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284004524] [2021-06-04 21:42:21,167 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 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 [2021-06-04 21:42:21,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:21,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:21,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:21,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284004524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:21,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242398785] [2021-06-04 21:42:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:21,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:21,340 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) [2021-06-04 21:42:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:21,608 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-04 21:42:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:21,608 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 [2021-06-04 21:42:21,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:21,611 INFO L225 Difference]: With dead ends: 3346 [2021-06-04 21:42:21,611 INFO L226 Difference]: Without dead ends: 3076 [2021-06-04 21:42:21,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-04 21:42:21,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-04 21:42:21,629 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) [2021-06-04 21:42:21,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-04 21:42:21,632 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-04 21:42:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:21,632 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-04 21:42:21,632 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) [2021-06-04 21:42:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-04 21:42:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:21,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:21,634 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] [2021-06-04 21:42:21,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:21,839 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-06-04 21:42:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:21,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405813787] [2021-06-04 21:42:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:21,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405813787] [2021-06-04 21:42:21,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405813787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:21,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362964597] [2021-06-04 21:42:21,975 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 [2021-06-04 21:42:22,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:22,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362964597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:22,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:22,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450609276] [2021-06-04 21:42:22,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:22,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:22,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:22,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:22,185 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) [2021-06-04 21:42:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:22,419 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-04 21:42:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-04 21:42:22,420 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 [2021-06-04 21:42:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:22,422 INFO L225 Difference]: With dead ends: 3396 [2021-06-04 21:42:22,422 INFO L226 Difference]: Without dead ends: 3126 [2021-06-04 21:42:22,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 254.9ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:42:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-04 21:42:22,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-04 21:42:22,442 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) [2021-06-04 21:42:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-04 21:42:22,444 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-04 21:42:22,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:22,445 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-04 21:42:22,445 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) [2021-06-04 21:42:22,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-04 21:42:22,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:22,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:22,446 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] [2021-06-04 21:42:22,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:22,648 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-06-04 21:42:22,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:22,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602809365] [2021-06-04 21:42:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602809365] [2021-06-04 21:42:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602809365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135293977] [2021-06-04 21:42:22,754 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 [2021-06-04 21:42:22,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:22,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:22,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135293977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:22,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:22,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:22,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620140681] [2021-06-04 21:42:22,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:22,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:22,938 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) [2021-06-04 21:42:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:23,263 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-04 21:42:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:23,263 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 [2021-06-04 21:42:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:23,266 INFO L225 Difference]: With dead ends: 3421 [2021-06-04 21:42:23,266 INFO L226 Difference]: Without dead ends: 3151 [2021-06-04 21:42:23,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 312.0ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:23,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-04 21:42:23,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-04 21:42:23,288 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) [2021-06-04 21:42:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-04 21:42:23,290 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-04 21:42:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:23,291 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-04 21:42:23,291 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) [2021-06-04 21:42:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-04 21:42:23,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:23,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:23,293 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] [2021-06-04 21:42:23,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-04 21:42:23,493 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:23,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:23,494 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-06-04 21:42:23,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:23,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411587298] [2021-06-04 21:42:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:23,604 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:23,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411587298] [2021-06-04 21:42:23,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411587298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:23,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550189356] [2021-06-04 21:42:23,605 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 [2021-06-04 21:42:23,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:23,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:23,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550189356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:23,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:23,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286871779] [2021-06-04 21:42:23,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:23,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:23,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:23,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:23,761 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) [2021-06-04 21:42:24,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:24,027 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-04 21:42:24,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:24,027 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 [2021-06-04 21:42:24,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:24,030 INFO L225 Difference]: With dead ends: 3446 [2021-06-04 21:42:24,030 INFO L226 Difference]: Without dead ends: 3176 [2021-06-04 21:42:24,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:24,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-04 21:42:24,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-04 21:42:24,052 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) [2021-06-04 21:42:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-04 21:42:24,054 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-04 21:42:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:24,055 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-04 21:42:24,055 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) [2021-06-04 21:42:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-04 21:42:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:24,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:24,056 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] [2021-06-04 21:42:24,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:24,257 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-06-04 21:42:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739895000] [2021-06-04 21:42:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:24,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739895000] [2021-06-04 21:42:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739895000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:24,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558327258] [2021-06-04 21:42:24,367 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 [2021-06-04 21:42:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:24,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:24,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558327258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:24,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:24,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:24,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391918499] [2021-06-04 21:42:24,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:24,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:24,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:24,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:24,529 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) [2021-06-04 21:42:24,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:24,924 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-04 21:42:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:24,924 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 [2021-06-04 21:42:24,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:24,927 INFO L225 Difference]: With dead ends: 3471 [2021-06-04 21:42:24,928 INFO L226 Difference]: Without dead ends: 3201 [2021-06-04 21:42:24,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-04 21:42:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-04 21:42:24,954 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) [2021-06-04 21:42:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-04 21:42:24,957 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-04 21:42:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:24,957 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-04 21:42:24,957 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) [2021-06-04 21:42:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-04 21:42:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:24,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:24,959 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] [2021-06-04 21:42:25,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-04 21:42:25,173 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:25,173 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-06-04 21:42:25,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:25,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978705629] [2021-06-04 21:42:25,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978705629] [2021-06-04 21:42:25,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978705629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026338043] [2021-06-04 21:42:25,293 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 [2021-06-04 21:42:25,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:25,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:25,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:25,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:25,439 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:25,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026338043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:25,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:25,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:25,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636064367] [2021-06-04 21:42:25,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:25,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:25,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:25,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:25,440 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) [2021-06-04 21:42:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:25,748 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-04 21:42:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:25,749 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 [2021-06-04 21:42:25,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:25,752 INFO L225 Difference]: With dead ends: 3496 [2021-06-04 21:42:25,752 INFO L226 Difference]: Without dead ends: 3226 [2021-06-04 21:42:25,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-04 21:42:25,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-04 21:42:25,776 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) [2021-06-04 21:42:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-04 21:42:25,779 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-04 21:42:25,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:25,779 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-04 21:42:25,779 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) [2021-06-04 21:42:25,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-04 21:42:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:25,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:25,781 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] [2021-06-04 21:42:25,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:25,982 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:25,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-06-04 21:42:25,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:25,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299319398] [2021-06-04 21:42:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299319398] [2021-06-04 21:42:26,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299319398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185046891] [2021-06-04 21:42:26,108 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 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 [2021-06-04 21:42:26,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:26,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:26,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:42:26,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185046891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:26,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75406240] [2021-06-04 21:42:26,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:26,270 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) [2021-06-04 21:42:26,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:26,659 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-04 21:42:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:26,659 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 [2021-06-04 21:42:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:26,662 INFO L225 Difference]: With dead ends: 3521 [2021-06-04 21:42:26,662 INFO L226 Difference]: Without dead ends: 3251 [2021-06-04 21:42:26,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=356, Invalid=1204, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-04 21:42:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-04 21:42:26,697 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) [2021-06-04 21:42:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-04 21:42:26,700 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-04 21:42:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:26,700 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-04 21:42:26,700 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) [2021-06-04 21:42:26,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-04 21:42:26,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:26,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:26,702 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] [2021-06-04 21:42:26,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-04 21:42:26,903 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:26,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:26,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-06-04 21:42:26,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:26,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158936266] [2021-06-04 21:42:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:26,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158936266] [2021-06-04 21:42:26,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158936266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:26,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014038306] [2021-06-04 21:42:26,992 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 [2021-06-04 21:42:27,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:27,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:27,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:27,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014038306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:27,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:27,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958419173] [2021-06-04 21:42:27,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:27,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:27,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:27,157 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) [2021-06-04 21:42:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:27,479 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-04 21:42:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:27,479 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 [2021-06-04 21:42:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:27,482 INFO L225 Difference]: With dead ends: 3591 [2021-06-04 21:42:27,483 INFO L226 Difference]: Without dead ends: 3321 [2021-06-04 21:42:27,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-04 21:42:27,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-04 21:42:27,507 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) [2021-06-04 21:42:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-04 21:42:27,511 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-04 21:42:27,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:27,511 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-04 21:42:27,511 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) [2021-06-04 21:42:27,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-04 21:42:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:27,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:27,513 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] [2021-06-04 21:42:27,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:27,729 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:27,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:27,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-06-04 21:42:27,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:27,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621350104] [2021-06-04 21:42:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:27,826 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:27,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621350104] [2021-06-04 21:42:27,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621350104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878086227] [2021-06-04 21:42:27,826 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 [2021-06-04 21:42:27,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:27,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:27,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878086227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:27,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:27,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074450994] [2021-06-04 21:42:27,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:27,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:27,973 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) [2021-06-04 21:42:28,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:28,485 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-04 21:42:28,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:28,485 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 [2021-06-04 21:42:28,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:28,488 INFO L225 Difference]: With dead ends: 4169 [2021-06-04 21:42:28,488 INFO L226 Difference]: Without dead ends: 3546 [2021-06-04 21:42:28,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:28,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-04 21:42:28,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-04 21:42:28,511 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) [2021-06-04 21:42:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-04 21:42:28,514 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-04 21:42:28,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:28,514 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-04 21:42:28,514 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) [2021-06-04 21:42:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-04 21:42:28,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:28,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:28,517 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] [2021-06-04 21:42:28,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-04 21:42:28,727 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:28,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:28,727 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-06-04 21:42:28,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385286698] [2021-06-04 21:42:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385286698] [2021-06-04 21:42:28,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385286698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885123979] [2021-06-04 21:42:28,818 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 [2021-06-04 21:42:28,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:28,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885123979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:28,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:28,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-04 21:42:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469148202] [2021-06-04 21:42:28,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-04 21:42:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-04 21:42:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-04 21:42:28,967 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) [2021-06-04 21:42:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:29,329 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-04 21:42:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:29,330 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 [2021-06-04 21:42:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:29,334 INFO L225 Difference]: With dead ends: 4398 [2021-06-04 21:42:29,334 INFO L226 Difference]: Without dead ends: 4128 [2021-06-04 21:42:29,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-04 21:42:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-04 21:42:29,362 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) [2021-06-04 21:42:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-04 21:42:29,366 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-04 21:42:29,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:29,366 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-04 21:42:29,366 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) [2021-06-04 21:42:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-04 21:42:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-04 21:42:29,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:29,368 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] [2021-06-04 21:42:29,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:29,569 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-06-04 21:42:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579452024] [2021-06-04 21:42:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:29,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:29,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579452024] [2021-06-04 21:42:29,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579452024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:29,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574048447] [2021-06-04 21:42:29,662 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 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 [2021-06-04 21:42:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:29,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-04 21:42:29,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:29,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574048447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:29,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:29,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-04 21:42:29,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251235527] [2021-06-04 21:42:29,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:29,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:29,832 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) [2021-06-04 21:42:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:30,291 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-04 21:42:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:30,291 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 [2021-06-04 21:42:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:30,295 INFO L225 Difference]: With dead ends: 3885 [2021-06-04 21:42:30,295 INFO L226 Difference]: Without dead ends: 3306 [2021-06-04 21:42:30,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 441.5ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-04 21:42:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-04 21:42:30,314 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) [2021-06-04 21:42:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-04 21:42:30,316 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-04 21:42:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:30,317 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-04 21:42:30,317 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) [2021-06-04 21:42:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-04 21:42:30,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:30,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:30,318 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] [2021-06-04 21:42:30,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:30,519 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:30,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-06-04 21:42:30,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:30,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467086863] [2021-06-04 21:42:30,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:30,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:30,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467086863] [2021-06-04 21:42:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467086863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:30,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957628930] [2021-06-04 21:42:30,639 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 [2021-06-04 21:42:30,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:30,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:30,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:30,804 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:30,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957628930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:30,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:30,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:30,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269734997] [2021-06-04 21:42:30,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:30,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:30,805 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) [2021-06-04 21:42:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:31,045 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-04 21:42:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:42:31,045 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 [2021-06-04 21:42:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:31,047 INFO L225 Difference]: With dead ends: 3131 [2021-06-04 21:42:31,047 INFO L226 Difference]: Without dead ends: 2861 [2021-06-04 21:42:31,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-04 21:42:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-04 21:42:31,067 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) [2021-06-04 21:42:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-04 21:42:31,070 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-04 21:42:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:31,070 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-04 21:42:31,070 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) [2021-06-04 21:42:31,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-04 21:42:31,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:31,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:31,071 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] [2021-06-04 21:42:31,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:31,272 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:31,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:31,272 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-06-04 21:42:31,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:31,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114783348] [2021-06-04 21:42:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:31,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114783348] [2021-06-04 21:42:31,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114783348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556321778] [2021-06-04 21:42:31,422 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 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 [2021-06-04 21:42:31,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:31,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:31,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556321778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:31,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:31,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:31,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749280132] [2021-06-04 21:42:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:31,607 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) [2021-06-04 21:42:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:31,925 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-04 21:42:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:31,925 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 [2021-06-04 21:42:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:31,928 INFO L225 Difference]: With dead ends: 3451 [2021-06-04 21:42:31,928 INFO L226 Difference]: Without dead ends: 3181 [2021-06-04 21:42:31,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:42:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-04 21:42:31,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-04 21:42:31,947 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) [2021-06-04 21:42:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-04 21:42:31,949 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-04 21:42:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:31,950 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-04 21:42:31,950 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) [2021-06-04 21:42:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-04 21:42:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:31,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:31,951 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] [2021-06-04 21:42:32,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:32,152 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-06-04 21:42:32,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:32,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996899970] [2021-06-04 21:42:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:32,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996899970] [2021-06-04 21:42:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996899970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684802261] [2021-06-04 21:42:32,263 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 [2021-06-04 21:42:32,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684802261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:32,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:32,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644644230] [2021-06-04 21:42:32,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:32,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:32,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:32,411 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) [2021-06-04 21:42:32,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:32,685 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-04 21:42:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:32,686 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 [2021-06-04 21:42:32,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:32,689 INFO L225 Difference]: With dead ends: 3481 [2021-06-04 21:42:32,689 INFO L226 Difference]: Without dead ends: 3211 [2021-06-04 21:42:32,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:42:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-04 21:42:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-04 21:42:32,710 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) [2021-06-04 21:42:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-04 21:42:32,713 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-04 21:42:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:32,713 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-04 21:42:32,713 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) [2021-06-04 21:42:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-04 21:42:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:32,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:32,714 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] [2021-06-04 21:42:32,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:32,915 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:32,915 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-06-04 21:42:32,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:32,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760922930] [2021-06-04 21:42:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760922930] [2021-06-04 21:42:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760922930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137962238] [2021-06-04 21:42:33,049 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 [2021-06-04 21:42:33,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:33,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:33,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:33,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137962238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:33,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:33,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397542264] [2021-06-04 21:42:33,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:33,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:33,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:33,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:33,216 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) [2021-06-04 21:42:33,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:33,592 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-04 21:42:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:33,592 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 [2021-06-04 21:42:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:33,595 INFO L225 Difference]: With dead ends: 3506 [2021-06-04 21:42:33,595 INFO L226 Difference]: Without dead ends: 3236 [2021-06-04 21:42:33,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 356.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:33,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-04 21:42:33,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-04 21:42:33,617 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) [2021-06-04 21:42:33,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-04 21:42:33,620 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-04 21:42:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:33,620 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-04 21:42:33,620 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) [2021-06-04 21:42:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-04 21:42:33,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:33,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:33,622 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] [2021-06-04 21:42:33,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:33,823 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-06-04 21:42:33,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:33,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988974174] [2021-06-04 21:42:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:33,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:33,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988974174] [2021-06-04 21:42:33,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988974174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:33,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405399199] [2021-06-04 21:42:33,930 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 [2021-06-04 21:42:33,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:33,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:33,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405399199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:34,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281578080] [2021-06-04 21:42:34,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:34,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:34,090 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) [2021-06-04 21:42:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:34,432 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-04 21:42:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:34,433 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 [2021-06-04 21:42:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:34,435 INFO L225 Difference]: With dead ends: 3531 [2021-06-04 21:42:34,435 INFO L226 Difference]: Without dead ends: 3261 [2021-06-04 21:42:34,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-04 21:42:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-04 21:42:34,461 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) [2021-06-04 21:42:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-04 21:42:34,465 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-04 21:42:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:34,465 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-04 21:42:34,465 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) [2021-06-04 21:42:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-04 21:42:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:34,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:34,466 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] [2021-06-04 21:42:34,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:34,681 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:34,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-06-04 21:42:34,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:34,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46001441] [2021-06-04 21:42:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:34,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46001441] [2021-06-04 21:42:34,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46001441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801181023] [2021-06-04 21:42:34,814 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 [2021-06-04 21:42:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:34,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:34,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:35,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801181023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:35,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:35,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:35,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990334850] [2021-06-04 21:42:35,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:35,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:35,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:35,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:35,006 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) [2021-06-04 21:42:35,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:35,408 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-04 21:42:35,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:35,408 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 [2021-06-04 21:42:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:35,412 INFO L225 Difference]: With dead ends: 3556 [2021-06-04 21:42:35,412 INFO L226 Difference]: Without dead ends: 3286 [2021-06-04 21:42:35,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 397.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-04 21:42:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-04 21:42:35,436 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) [2021-06-04 21:42:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-04 21:42:35,439 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-04 21:42:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:35,439 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-04 21:42:35,439 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) [2021-06-04 21:42:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-04 21:42:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:35,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:35,441 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] [2021-06-04 21:42:35,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-04 21:42:35,645 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:35,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:35,645 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-06-04 21:42:35,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:35,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323791499] [2021-06-04 21:42:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:35,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323791499] [2021-06-04 21:42:35,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323791499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:35,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035505399] [2021-06-04 21:42:35,757 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 [2021-06-04 21:42:35,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:35,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:35,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:35,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035505399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:35,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:35,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:35,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128942834] [2021-06-04 21:42:35,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:35,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:35,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:35,912 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) [2021-06-04 21:42:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:36,256 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-04 21:42:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:36,257 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 [2021-06-04 21:42:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:36,260 INFO L225 Difference]: With dead ends: 3581 [2021-06-04 21:42:36,260 INFO L226 Difference]: Without dead ends: 3311 [2021-06-04 21:42:36,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:42:36,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-04 21:42:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-04 21:42:36,296 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) [2021-06-04 21:42:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-04 21:42:36,299 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-04 21:42:36,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:36,299 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-04 21:42:36,299 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) [2021-06-04 21:42:36,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-04 21:42:36,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:36,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:36,301 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] [2021-06-04 21:42:36,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:36,502 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-06-04 21:42:36,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:36,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88537042] [2021-06-04 21:42:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88537042] [2021-06-04 21:42:36,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88537042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896166368] [2021-06-04 21:42:36,609 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 [2021-06-04 21:42:36,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-04 21:42:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:36,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:42:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:36,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896166368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:36,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:36,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:36,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223338786] [2021-06-04 21:42:36,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:36,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:36,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:36,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:36,780 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) [2021-06-04 21:42:37,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:37,212 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-04 21:42:37,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:37,212 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 [2021-06-04 21:42:37,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:37,215 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:42:37,215 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:42:37,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:42:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-04 21:42:37,240 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) [2021-06-04 21:42:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-04 21:42:37,243 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-04 21:42:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:37,243 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-04 21:42:37,243 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) [2021-06-04 21:42:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-04 21:42:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:37,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:37,245 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] [2021-06-04 21:42:37,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-04 21:42:37,445 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:37,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:37,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-06-04 21:42:37,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:37,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180621227] [2021-06-04 21:42:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:37,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:37,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180621227] [2021-06-04 21:42:37,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180621227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:37,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700045091] [2021-06-04 21:42:37,548 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 [2021-06-04 21:42:37,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:37,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:37,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:37,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:37,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700045091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:37,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:37,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757214307] [2021-06-04 21:42:37,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:37,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:37,705 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) [2021-06-04 21:42:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:38,078 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-04 21:42:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:38,079 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 [2021-06-04 21:42:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:38,082 INFO L225 Difference]: With dead ends: 3631 [2021-06-04 21:42:38,082 INFO L226 Difference]: Without dead ends: 3361 [2021-06-04 21:42:38,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:42:38,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-04 21:42:38,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-04 21:42:38,122 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) [2021-06-04 21:42:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-04 21:42:38,126 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-04 21:42:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:38,126 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-04 21:42:38,126 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) [2021-06-04 21:42:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-04 21:42:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:38,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:38,128 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] [2021-06-04 21:42:38,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:38,328 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:38,329 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-06-04 21:42:38,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:38,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318619577] [2021-06-04 21:42:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:38,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318619577] [2021-06-04 21:42:38,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318619577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:38,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363606591] [2021-06-04 21:42:38,435 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 [2021-06-04 21:42:38,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-04 21:42:38,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:38,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:38,589 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:38,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363606591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:38,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:38,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:38,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877839737] [2021-06-04 21:42:38,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:38,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:38,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:38,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:38,590 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) [2021-06-04 21:42:39,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:39,072 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-04 21:42:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:42:39,072 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 [2021-06-04 21:42:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:39,075 INFO L225 Difference]: With dead ends: 3716 [2021-06-04 21:42:39,075 INFO L226 Difference]: Without dead ends: 3446 [2021-06-04 21:42:39,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 439.6ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:39,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-04 21:42:39,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-04 21:42:39,103 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) [2021-06-04 21:42:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-04 21:42:39,106 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-04 21:42:39,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:39,106 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-04 21:42:39,106 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) [2021-06-04 21:42:39,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-04 21:42:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:39,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:39,108 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] [2021-06-04 21:42:39,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:39,308 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:39,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-06-04 21:42:39,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:39,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541074031] [2021-06-04 21:42:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:39,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541074031] [2021-06-04 21:42:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541074031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770035390] [2021-06-04 21:42:39,411 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 [2021-06-04 21:42:39,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-04 21:42:39,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:39,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770035390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:39,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:39,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-04 21:42:39,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505706110] [2021-06-04 21:42:39,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-04 21:42:39,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-04 21:42:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-04 21:42:39,571 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) [2021-06-04 21:42:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:39,981 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-04 21:42:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:39,981 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 [2021-06-04 21:42:39,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:39,985 INFO L225 Difference]: With dead ends: 4458 [2021-06-04 21:42:39,985 INFO L226 Difference]: Without dead ends: 4188 [2021-06-04 21:42:39,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:42:39,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-04 21:42:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-04 21:42:40,012 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) [2021-06-04 21:42:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-04 21:42:40,016 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-04 21:42:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:40,016 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-04 21:42:40,016 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) [2021-06-04 21:42:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-04 21:42:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-04 21:42:40,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:40,018 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] [2021-06-04 21:42:40,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:40,219 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:40,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-06-04 21:42:40,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:40,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761831915] [2021-06-04 21:42:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761831915] [2021-06-04 21:42:40,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761831915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187678536] [2021-06-04 21:42:40,322 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 [2021-06-04 21:42:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:40,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-04 21:42:40,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:40,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187678536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:40,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:40,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-04 21:42:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557541744] [2021-06-04 21:42:40,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:40,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:40,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:40,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:40,480 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) [2021-06-04 21:42:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:40,965 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-04 21:42:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:40,965 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 [2021-06-04 21:42:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:40,969 INFO L225 Difference]: With dead ends: 3920 [2021-06-04 21:42:40,969 INFO L226 Difference]: Without dead ends: 3431 [2021-06-04 21:42:40,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:42:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-04 21:42:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-04 21:42:40,988 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) [2021-06-04 21:42:40,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-04 21:42:40,990 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-04 21:42:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:40,990 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-04 21:42:40,990 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) [2021-06-04 21:42:40,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-04 21:42:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:40,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:40,992 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] [2021-06-04 21:42:41,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:41,192 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-06-04 21:42:41,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:41,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881795011] [2021-06-04 21:42:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:41,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:41,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881795011] [2021-06-04 21:42:41,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881795011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:41,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463613491] [2021-06-04 21:42:41,335 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 [2021-06-04 21:42:41,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:41,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:41,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:41,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:41,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463613491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:41,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:41,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:41,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775709606] [2021-06-04 21:42:41,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:41,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:41,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:41,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:41,536 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) [2021-06-04 21:42:41,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:41,858 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-04 21:42:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:41,858 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 [2021-06-04 21:42:41,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:41,860 INFO L225 Difference]: With dead ends: 3024 [2021-06-04 21:42:41,860 INFO L226 Difference]: Without dead ends: 2690 [2021-06-04 21:42:41,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 354.5ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-04 21:42:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-04 21:42:41,877 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) [2021-06-04 21:42:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-04 21:42:41,879 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-04 21:42:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:41,879 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-04 21:42:41,879 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) [2021-06-04 21:42:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-04 21:42:41,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:41,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:41,881 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] [2021-06-04 21:42:42,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:42,081 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:42,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:42,082 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-06-04 21:42:42,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:42,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718598916] [2021-06-04 21:42:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718598916] [2021-06-04 21:42:42,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718598916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219544689] [2021-06-04 21:42:42,226 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 [2021-06-04 21:42:42,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:42,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:42,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219544689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:42,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:42,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991045836] [2021-06-04 21:42:42,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:42,398 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) [2021-06-04 21:42:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:42,629 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-04 21:42:42,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-04 21:42:42,629 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 [2021-06-04 21:42:42,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:42,632 INFO L225 Difference]: With dead ends: 3646 [2021-06-04 21:42:42,632 INFO L226 Difference]: Without dead ends: 3376 [2021-06-04 21:42:42,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:42:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-04 21:42:42,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-04 21:42:42,653 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) [2021-06-04 21:42:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-04 21:42:42,655 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-04 21:42:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:42,655 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-04 21:42:42,655 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) [2021-06-04 21:42:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-04 21:42:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:42,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:42,657 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] [2021-06-04 21:42:42,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:42,865 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:42,865 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-06-04 21:42:42,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:42,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431153270] [2021-06-04 21:42:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:43,003 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431153270] [2021-06-04 21:42:43,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431153270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135560700] [2021-06-04 21:42:43,003 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 [2021-06-04 21:42:43,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135560700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:43,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:43,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380025890] [2021-06-04 21:42:43,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:43,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:43,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:43,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:43,181 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) [2021-06-04 21:42:43,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:43,493 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-04 21:42:43,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:43,494 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 [2021-06-04 21:42:43,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:43,497 INFO L225 Difference]: With dead ends: 3606 [2021-06-04 21:42:43,497 INFO L226 Difference]: Without dead ends: 3336 [2021-06-04 21:42:43,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-04 21:42:43,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-04 21:42:43,519 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) [2021-06-04 21:42:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-04 21:42:43,521 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-04 21:42:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:43,521 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-04 21:42:43,522 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) [2021-06-04 21:42:43,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-04 21:42:43,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:43,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:43,523 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] [2021-06-04 21:42:43,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-04 21:42:43,724 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-06-04 21:42:43,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:43,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186827215] [2021-06-04 21:42:43,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:43,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186827215] [2021-06-04 21:42:43,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186827215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:43,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106926496] [2021-06-04 21:42:43,863 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 [2021-06-04 21:42:43,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:43,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106926496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:44,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:44,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876100461] [2021-06-04 21:42:44,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:44,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:44,040 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) [2021-06-04 21:42:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:44,308 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-04 21:42:44,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-04 21:42:44,309 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 [2021-06-04 21:42:44,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:44,312 INFO L225 Difference]: With dead ends: 3656 [2021-06-04 21:42:44,312 INFO L226 Difference]: Without dead ends: 3386 [2021-06-04 21:42:44,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:42:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-04 21:42:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-04 21:42:44,333 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) [2021-06-04 21:42:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-04 21:42:44,336 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-04 21:42:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:44,336 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-04 21:42:44,336 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) [2021-06-04 21:42:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-04 21:42:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:44,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:44,338 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] [2021-06-04 21:42:44,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:44,539 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-06-04 21:42:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:44,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188868332] [2021-06-04 21:42:44,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:44,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188868332] [2021-06-04 21:42:44,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188868332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654105166] [2021-06-04 21:42:44,676 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 [2021-06-04 21:42:44,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:44,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:44,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654105166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:44,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:44,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:44,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733860325] [2021-06-04 21:42:44,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:44,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:44,894 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) [2021-06-04 21:42:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:45,258 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-04 21:42:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:45,258 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 [2021-06-04 21:42:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:45,262 INFO L225 Difference]: With dead ends: 3681 [2021-06-04 21:42:45,262 INFO L226 Difference]: Without dead ends: 3411 [2021-06-04 21:42:45,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 367.4ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-04 21:42:45,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-04 21:42:45,284 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) [2021-06-04 21:42:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-04 21:42:45,287 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-04 21:42:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:45,287 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-04 21:42:45,287 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) [2021-06-04 21:42:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-04 21:42:45,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:45,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:45,289 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] [2021-06-04 21:42:45,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-04 21:42:45,490 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:45,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:45,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-06-04 21:42:45,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:45,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861288290] [2021-06-04 21:42:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:45,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861288290] [2021-06-04 21:42:45,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861288290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:45,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939566168] [2021-06-04 21:42:45,626 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 [2021-06-04 21:42:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:45,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939566168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:45,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:45,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:45,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346327855] [2021-06-04 21:42:45,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:45,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:45,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:45,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:45,792 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) [2021-06-04 21:42:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:46,102 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-04 21:42:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:42:46,102 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 [2021-06-04 21:42:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:46,105 INFO L225 Difference]: With dead ends: 3706 [2021-06-04 21:42:46,105 INFO L226 Difference]: Without dead ends: 3436 [2021-06-04 21:42:46,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-04 21:42:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-04 21:42:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-04 21:42:46,128 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) [2021-06-04 21:42:46,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-04 21:42:46,131 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-04 21:42:46,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:46,131 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-04 21:42:46,131 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) [2021-06-04 21:42:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-04 21:42:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:46,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:46,133 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] [2021-06-04 21:42:46,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:46,334 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-06-04 21:42:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:46,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125718073] [2021-06-04 21:42:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:46,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:46,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125718073] [2021-06-04 21:42:46,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125718073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:46,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090563287] [2021-06-04 21:42:46,463 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 [2021-06-04 21:42:46,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:46,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:46,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090563287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:46,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:46,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245967555] [2021-06-04 21:42:46,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:46,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:46,638 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) [2021-06-04 21:42:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:47,057 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-04 21:42:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:47,057 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 [2021-06-04 21:42:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:47,060 INFO L225 Difference]: With dead ends: 3731 [2021-06-04 21:42:47,060 INFO L226 Difference]: Without dead ends: 3461 [2021-06-04 21:42:47,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:47,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-04 21:42:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-04 21:42:47,083 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) [2021-06-04 21:42:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-04 21:42:47,086 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-04 21:42:47,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:47,087 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-04 21:42:47,087 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) [2021-06-04 21:42:47,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-04 21:42:47,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:47,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:47,089 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] [2021-06-04 21:42:47,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-04 21:42:47,293 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-06-04 21:42:47,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:47,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691161047] [2021-06-04 21:42:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:47,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691161047] [2021-06-04 21:42:47,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691161047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:47,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076873976] [2021-06-04 21:42:47,431 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 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 [2021-06-04 21:42:47,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:47,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:47,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:42:47,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:47,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076873976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:47,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:47,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587251788] [2021-06-04 21:42:47,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:47,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:47,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:47,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:47,596 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) [2021-06-04 21:42:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:47,940 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-04 21:42:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:47,941 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 [2021-06-04 21:42:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:47,944 INFO L225 Difference]: With dead ends: 3756 [2021-06-04 21:42:47,944 INFO L226 Difference]: Without dead ends: 3486 [2021-06-04 21:42:47,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 337.0ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-04 21:42:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-04 21:42:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-04 21:42:47,971 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) [2021-06-04 21:42:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-04 21:42:47,974 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-04 21:42:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:47,974 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-04 21:42:47,974 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) [2021-06-04 21:42:47,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-04 21:42:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:47,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:47,976 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] [2021-06-04 21:42:48,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-04 21:42:48,177 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-06-04 21:42:48,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:48,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29010937] [2021-06-04 21:42:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:48,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:48,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29010937] [2021-06-04 21:42:48,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29010937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:48,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261148877] [2021-06-04 21:42:48,300 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 [2021-06-04 21:42:48,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:48,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:48,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:48,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:48,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261148877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:48,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:48,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:48,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588549548] [2021-06-04 21:42:48,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:48,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:48,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:48,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:48,495 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) [2021-06-04 21:42:48,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:48,958 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-04 21:42:48,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:48,958 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 [2021-06-04 21:42:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:48,961 INFO L225 Difference]: With dead ends: 3781 [2021-06-04 21:42:48,961 INFO L226 Difference]: Without dead ends: 3511 [2021-06-04 21:42:48,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:48,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-04 21:42:48,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-04 21:42:48,986 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) [2021-06-04 21:42:48,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-04 21:42:48,989 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-04 21:42:48,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:48,989 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-04 21:42:48,989 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) [2021-06-04 21:42:48,989 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-04 21:42:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:48,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:48,991 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] [2021-06-04 21:42:49,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-04 21:42:49,191 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:49,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:49,192 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-06-04 21:42:49,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:49,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149364032] [2021-06-04 21:42:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:49,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:49,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149364032] [2021-06-04 21:42:49,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149364032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:49,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207615929] [2021-06-04 21:42:49,319 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 [2021-06-04 21:42:49,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:49,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:49,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:49,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207615929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:49,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:49,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:49,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379896870] [2021-06-04 21:42:49,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:49,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:49,478 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) [2021-06-04 21:42:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:49,867 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-04 21:42:49,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:49,867 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 [2021-06-04 21:42:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:49,871 INFO L225 Difference]: With dead ends: 3806 [2021-06-04 21:42:49,871 INFO L226 Difference]: Without dead ends: 3536 [2021-06-04 21:42:49,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-04 21:42:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-04 21:42:49,896 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) [2021-06-04 21:42:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-04 21:42:49,899 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-04 21:42:49,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:49,899 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-04 21:42:49,900 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) [2021-06-04 21:42:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-04 21:42:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:49,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:49,902 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] [2021-06-04 21:42:50,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:50,102 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:50,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-06-04 21:42:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:50,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867014291] [2021-06-04 21:42:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:50,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867014291] [2021-06-04 21:42:50,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867014291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:50,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509541052] [2021-06-04 21:42:50,222 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 [2021-06-04 21:42:50,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:50,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:42:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509541052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:50,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:50,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:50,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038184832] [2021-06-04 21:42:50,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:50,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:50,395 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) [2021-06-04 21:42:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:50,865 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-04 21:42:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:42:50,866 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 [2021-06-04 21:42:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:50,869 INFO L225 Difference]: With dead ends: 3831 [2021-06-04 21:42:50,869 INFO L226 Difference]: Without dead ends: 3561 [2021-06-04 21:42:50,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:50,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-04 21:42:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-04 21:42:50,906 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) [2021-06-04 21:42:50,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-04 21:42:50,909 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-04 21:42:50,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:50,910 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-04 21:42:50,910 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) [2021-06-04 21:42:50,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-04 21:42:50,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:50,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:50,912 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] [2021-06-04 21:42:51,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-04 21:42:51,112 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:51,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-06-04 21:42:51,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:51,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053875654] [2021-06-04 21:42:51,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:51,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:51,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053875654] [2021-06-04 21:42:51,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053875654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:51,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803483407] [2021-06-04 21:42:51,225 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 [2021-06-04 21:42:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:51,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:51,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803483407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:51,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:51,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390429725] [2021-06-04 21:42:51,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:51,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:51,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:51,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:51,378 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) [2021-06-04 21:42:51,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:51,780 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-04 21:42:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:42:51,781 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 [2021-06-04 21:42:51,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:51,784 INFO L225 Difference]: With dead ends: 3856 [2021-06-04 21:42:51,784 INFO L226 Difference]: Without dead ends: 3586 [2021-06-04 21:42:51,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:51,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-04 21:42:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-04 21:42:51,812 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) [2021-06-04 21:42:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-04 21:42:51,816 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-04 21:42:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:51,816 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-04 21:42:51,816 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) [2021-06-04 21:42:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-04 21:42:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:51,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:51,818 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] [2021-06-04 21:42:52,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:52,021 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:52,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:52,021 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-06-04 21:42:52,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:52,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320405230] [2021-06-04 21:42:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:52,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:52,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320405230] [2021-06-04 21:42:52,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320405230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:52,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630240213] [2021-06-04 21:42:52,134 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 [2021-06-04 21:42:52,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:52,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:52,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:52,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630240213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:52,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:52,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-04 21:42:52,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699364922] [2021-06-04 21:42:52,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-04 21:42:52,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:52,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-04 21:42:52,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-04 21:42:52,299 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) [2021-06-04 21:42:52,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:52,852 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-04 21:42:52,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:42:52,853 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 [2021-06-04 21:42:52,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:52,856 INFO L225 Difference]: With dead ends: 3941 [2021-06-04 21:42:52,856 INFO L226 Difference]: Without dead ends: 3671 [2021-06-04 21:42:52,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 514.3ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:42:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-04 21:42:52,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-04 21:42:52,885 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) [2021-06-04 21:42:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-04 21:42:52,889 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-04 21:42:52,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:52,889 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-04 21:42:52,889 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) [2021-06-04 21:42:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-04 21:42:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:52,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:52,891 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] [2021-06-04 21:42:53,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-04 21:42:53,093 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-06-04 21:42:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:53,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647396578] [2021-06-04 21:42:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:53,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647396578] [2021-06-04 21:42:53,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647396578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:53,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188092121] [2021-06-04 21:42:53,203 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 [2021-06-04 21:42:53,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:53,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:53,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:53,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188092121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:53,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:53,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-04 21:42:53,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791683553] [2021-06-04 21:42:53,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-04 21:42:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-04 21:42:53,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-04 21:42:53,390 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) [2021-06-04 21:42:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:53,832 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-04 21:42:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:42:53,833 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 [2021-06-04 21:42:53,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:53,837 INFO L225 Difference]: With dead ends: 4708 [2021-06-04 21:42:53,837 INFO L226 Difference]: Without dead ends: 4438 [2021-06-04 21:42:53,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 401.5ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:42:53,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-04 21:42:53,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-04 21:42:53,868 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) [2021-06-04 21:42:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-04 21:42:53,872 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-04 21:42:53,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:53,872 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-04 21:42:53,872 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) [2021-06-04 21:42:53,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-04 21:42:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-04 21:42:53,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:53,875 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] [2021-06-04 21:42:54,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:54,085 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-06-04 21:42:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:54,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459996581] [2021-06-04 21:42:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:54,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:54,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459996581] [2021-06-04 21:42:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459996581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645319313] [2021-06-04 21:42:54,198 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 [2021-06-04 21:42:54,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:42:54,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:54,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-04 21:42:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645319313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:54,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:54,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-04 21:42:54,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179179920] [2021-06-04 21:42:54,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:54,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:54,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:54,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:54,396 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) [2021-06-04 21:42:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:55,099 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-04 21:42:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:42:55,100 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 [2021-06-04 21:42:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:55,104 INFO L225 Difference]: With dead ends: 4651 [2021-06-04 21:42:55,104 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:42:55,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:42:55,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:42:55,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:42:55,133 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) [2021-06-04 21:42:55,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:55,137 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-04 21:42:55,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:55,137 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:55,137 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) [2021-06-04 21:42:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:55,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:55,140 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] [2021-06-04 21:42:55,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:55,354 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:55,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:55,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-06-04 21:42:55,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:55,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850216114] [2021-06-04 21:42:55,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:55,500 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:55,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:55,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850216114] [2021-06-04 21:42:55,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850216114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:55,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919227659] [2021-06-04 21:42:55,501 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 [2021-06-04 21:42:55,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:42:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:55,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919227659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:55,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:55,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724732632] [2021-06-04 21:42:55,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:55,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:55,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:55,696 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) [2021-06-04 21:42:55,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:55,989 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-04 21:42:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:42:55,989 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 [2021-06-04 21:42:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:55,993 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:42:55,993 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:42:55,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 323.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:42:56,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:42:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:42:56,028 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) [2021-06-04 21:42:56,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:56,032 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:56,032 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:56,032 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) [2021-06-04 21:42:56,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:56,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:56,034 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] [2021-06-04 21:42:56,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-04 21:42:56,234 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:56,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:56,235 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-06-04 21:42:56,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:56,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127861948] [2021-06-04 21:42:56,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:56,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:56,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127861948] [2021-06-04 21:42:56,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127861948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:56,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115500309] [2021-06-04 21:42:56,391 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 [2021-06-04 21:42:56,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:42:56,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:56,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:56,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:56,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115500309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:56,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:56,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:56,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411906316] [2021-06-04 21:42:56,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:56,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:56,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:56,615 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) [2021-06-04 21:42:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:56,956 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-04 21:42:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:42:56,956 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 [2021-06-04 21:42:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:56,960 INFO L225 Difference]: With dead ends: 4641 [2021-06-04 21:42:56,960 INFO L226 Difference]: Without dead ends: 4371 [2021-06-04 21:42:56,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-04 21:42:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-04 21:42:56,990 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) [2021-06-04 21:42:56,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:56,994 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:56,994 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:56,994 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) [2021-06-04 21:42:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:56,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:56,996 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] [2021-06-04 21:42:57,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:57,197 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-06-04 21:42:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:57,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347460351] [2021-06-04 21:42:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:57,338 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347460351] [2021-06-04 21:42:57,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347460351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927249516] [2021-06-04 21:42:57,338 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 [2021-06-04 21:42:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:57,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:57,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:57,525 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:57,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927249516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:57,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:57,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:57,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911925109] [2021-06-04 21:42:57,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:57,526 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) [2021-06-04 21:42:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:57,848 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-04 21:42:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:42:57,849 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 [2021-06-04 21:42:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:57,853 INFO L225 Difference]: With dead ends: 4596 [2021-06-04 21:42:57,853 INFO L226 Difference]: Without dead ends: 4326 [2021-06-04 21:42:57,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 346.7ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:42:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-04 21:42:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-04 21:42:57,886 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) [2021-06-04 21:42:57,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:57,891 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:57,892 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:57,892 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) [2021-06-04 21:42:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:57,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:57,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:57,894 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] [2021-06-04 21:42:58,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:42:58,095 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:58,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-06-04 21:42:58,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:58,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061126811] [2021-06-04 21:42:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:58,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:58,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061126811] [2021-06-04 21:42:58,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061126811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:58,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447641701] [2021-06-04 21:42:58,240 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 [2021-06-04 21:42:58,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:42:58,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:58,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:42:58,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:58,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447641701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:58,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:58,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:42:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153402087] [2021-06-04 21:42:58,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:42:58,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:58,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:42:58,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:42:58,457 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) [2021-06-04 21:42:58,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:58,843 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-04 21:42:58,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:42:58,843 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 [2021-06-04 21:42:58,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:58,847 INFO L225 Difference]: With dead ends: 4546 [2021-06-04 21:42:58,847 INFO L226 Difference]: Without dead ends: 4276 [2021-06-04 21:42:58,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:58,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-04 21:42:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-04 21:42:58,873 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) [2021-06-04 21:42:58,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:58,877 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:58,877 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:58,877 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) [2021-06-04 21:42:58,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:58,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:58,879 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] [2021-06-04 21:42:59,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-04 21:42:59,080 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:42:59,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:42:59,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-06-04 21:42:59,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:42:59,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209117815] [2021-06-04 21:42:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:42:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:42:59,211 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:59,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:42:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209117815] [2021-06-04 21:42:59,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209117815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:59,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912012348] [2021-06-04 21:42:59,211 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 [2021-06-04 21:42:59,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:42:59,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:42:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:42:59,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:42:59,389 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:42:59,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912012348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:42:59,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:42:59,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:42:59,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316906627] [2021-06-04 21:42:59,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:42:59,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:42:59,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:42:59,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:42:59,390 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) [2021-06-04 21:42:59,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:42:59,759 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-04 21:42:59,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:42:59,760 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 [2021-06-04 21:42:59,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:42:59,764 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:42:59,764 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:42:59,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:42:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:42:59,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-04 21:42:59,793 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) [2021-06-04 21:42:59,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:42:59,798 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:42:59,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:42:59,798 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:42:59,798 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) [2021-06-04 21:42:59,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:42:59,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:42:59,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:42:59,800 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] [2021-06-04 21:43:00,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-04 21:43:00,001 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-06-04 21:43:00,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:00,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409702163] [2021-06-04 21:43:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:00,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:00,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409702163] [2021-06-04 21:43:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409702163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:00,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840294377] [2021-06-04 21:43:00,178 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 [2021-06-04 21:43:00,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:00,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:00,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:00,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:00,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840294377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:00,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:00,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:43:00,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377812119] [2021-06-04 21:43:00,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:00,386 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) [2021-06-04 21:43:00,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:00,811 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-04 21:43:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:00,812 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 [2021-06-04 21:43:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:00,815 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:00,815 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:00,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-04 21:43:00,843 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) [2021-06-04 21:43:00,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:00,847 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:00,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:00,847 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:00,847 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) [2021-06-04 21:43:00,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:00,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:00,849 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] [2021-06-04 21:43:01,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-04 21:43:01,050 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-06-04 21:43:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:01,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133926677] [2021-06-04 21:43:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:01,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:01,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133926677] [2021-06-04 21:43:01,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133926677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:01,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878888992] [2021-06-04 21:43:01,181 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 [2021-06-04 21:43:01,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:43:01,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:01,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:01,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:01,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878888992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:01,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:01,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:43:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008080365] [2021-06-04 21:43:01,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:43:01,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:01,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:43:01,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:43:01,369 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) [2021-06-04 21:43:01,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:01,768 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-04 21:43:01,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:01,768 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 [2021-06-04 21:43:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:01,771 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:01,772 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:01,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:01,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-04 21:43:01,797 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) [2021-06-04 21:43:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:01,801 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:01,802 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:01,802 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) [2021-06-04 21:43:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:01,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:01,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:01,804 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] [2021-06-04 21:43:02,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:02,005 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:02,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:02,005 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-06-04 21:43:02,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:02,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375041883] [2021-06-04 21:43:02,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:02,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:02,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375041883] [2021-06-04 21:43:02,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375041883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:02,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341089487] [2021-06-04 21:43:02,145 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 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 [2021-06-04 21:43:02,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:43:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:02,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:02,352 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:02,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341089487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:02,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:02,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:43:02,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296774240] [2021-06-04 21:43:02,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:02,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:02,353 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) [2021-06-04 21:43:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:02,848 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-04 21:43:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:02,849 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 [2021-06-04 21:43:02,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:02,853 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:43:02,853 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:43:02,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:02,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:43:02,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-04 21:43:02,885 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) [2021-06-04 21:43:02,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:02,890 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:02,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:02,890 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:02,890 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) [2021-06-04 21:43:02,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:02,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:02,893 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] [2021-06-04 21:43:03,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-04 21:43:03,093 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:03,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-06-04 21:43:03,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:03,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033731430] [2021-06-04 21:43:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033731430] [2021-06-04 21:43:03,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033731430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897310852] [2021-06-04 21:43:03,218 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 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 [2021-06-04 21:43:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:03,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897310852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:03,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:03,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:43:03,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837691456] [2021-06-04 21:43:03,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:43:03,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:03,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:43:03,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:43:03,396 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) [2021-06-04 21:43:03,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:03,855 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-04 21:43:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:03,855 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 [2021-06-04 21:43:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:03,859 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:03,859 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:03,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 428.5ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:03,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-04 21:43:03,893 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) [2021-06-04 21:43:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:03,898 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:03,898 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:03,899 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) [2021-06-04 21:43:03,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:03,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:03,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:03,901 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] [2021-06-04 21:43:04,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-04 21:43:04,101 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:04,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:04,102 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-06-04 21:43:04,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:04,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150760758] [2021-06-04 21:43:04,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150760758] [2021-06-04 21:43:04,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150760758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065155270] [2021-06-04 21:43:04,228 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 [2021-06-04 21:43:04,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:04,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065155270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:04,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:04,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:43:04,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865961099] [2021-06-04 21:43:04,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:04,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:04,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:04,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:04,418 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) [2021-06-04 21:43:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:04,955 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-04 21:43:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:04,955 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 [2021-06-04 21:43:04,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:04,959 INFO L225 Difference]: With dead ends: 4246 [2021-06-04 21:43:04,959 INFO L226 Difference]: Without dead ends: 3976 [2021-06-04 21:43:04,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 507.7ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:04,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-04 21:43:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-04 21:43:04,987 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) [2021-06-04 21:43:04,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:04,991 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:04,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:04,991 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:04,991 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) [2021-06-04 21:43:04,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:04,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:04,993 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] [2021-06-04 21:43:05,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-04 21:43:05,194 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-06-04 21:43:05,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:05,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873849450] [2021-06-04 21:43:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:05,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873849450] [2021-06-04 21:43:05,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873849450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:05,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396070111] [2021-06-04 21:43:05,315 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 [2021-06-04 21:43:05,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-04 21:43:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:05,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:05,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396070111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:05,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:05,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:43:05,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181680185] [2021-06-04 21:43:05,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:43:05,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:05,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:43:05,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:43:05,508 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) [2021-06-04 21:43:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:05,966 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-04 21:43:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:05,966 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 [2021-06-04 21:43:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:05,970 INFO L225 Difference]: With dead ends: 4196 [2021-06-04 21:43:05,970 INFO L226 Difference]: Without dead ends: 3926 [2021-06-04 21:43:05,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 424.0ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:05,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-04 21:43:05,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-04 21:43:05,997 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) [2021-06-04 21:43:06,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-04 21:43:06,001 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-04 21:43:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:06,001 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-04 21:43:06,001 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) [2021-06-04 21:43:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-04 21:43:06,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:06,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:06,003 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] [2021-06-04 21:43:06,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:06,205 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-06-04 21:43:06,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:06,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730500462] [2021-06-04 21:43:06,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:06,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730500462] [2021-06-04 21:43:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730500462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178968709] [2021-06-04 21:43:06,321 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 [2021-06-04 21:43:06,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:06,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:06,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178968709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:06,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:06,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:43:06,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885129917] [2021-06-04 21:43:06,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:06,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:06,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:06,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:06,506 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) [2021-06-04 21:43:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:07,134 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-04 21:43:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:07,134 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 [2021-06-04 21:43:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:07,138 INFO L225 Difference]: With dead ends: 4206 [2021-06-04 21:43:07,138 INFO L226 Difference]: Without dead ends: 3936 [2021-06-04 21:43:07,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-04 21:43:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-04 21:43:07,177 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) [2021-06-04 21:43:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-04 21:43:07,181 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-04 21:43:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:07,181 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-04 21:43:07,181 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) [2021-06-04 21:43:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-04 21:43:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:07,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:07,183 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] [2021-06-04 21:43:07,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:07,383 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:07,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:07,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-06-04 21:43:07,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:07,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520259766] [2021-06-04 21:43:07,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:07,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:07,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520259766] [2021-06-04 21:43:07,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520259766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:07,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917375136] [2021-06-04 21:43:07,508 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 [2021-06-04 21:43:07,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-04 21:43:07,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:07,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-04 21:43:07,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:07,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917375136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:07,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:07,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-04 21:43:07,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77684012] [2021-06-04 21:43:07,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-04 21:43:07,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-04 21:43:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-04 21:43:07,679 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) [2021-06-04 21:43:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:08,182 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-04 21:43:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:08,182 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 [2021-06-04 21:43:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:08,187 INFO L225 Difference]: With dead ends: 4948 [2021-06-04 21:43:08,187 INFO L226 Difference]: Without dead ends: 4678 [2021-06-04 21:43:08,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-04 21:43:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-04 21:43:08,223 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) [2021-06-04 21:43:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-04 21:43:08,228 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-04 21:43:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:08,228 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-04 21:43:08,228 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) [2021-06-04 21:43:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-04 21:43:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-04 21:43:08,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:08,231 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] [2021-06-04 21:43:08,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:08,431 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-06-04 21:43:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:08,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747779594] [2021-06-04 21:43:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:08,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747779594] [2021-06-04 21:43:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747779594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811041075] [2021-06-04 21:43:08,551 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 [2021-06-04 21:43:08,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-04 21:43:08,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:08,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:08,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811041075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:08,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:08,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-04 21:43:08,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325408423] [2021-06-04 21:43:08,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:08,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:08,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:08,764 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) [2021-06-04 21:43:09,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:09,425 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-04 21:43:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:09,425 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 [2021-06-04 21:43:09,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:09,429 INFO L225 Difference]: With dead ends: 4816 [2021-06-04 21:43:09,429 INFO L226 Difference]: Without dead ends: 4241 [2021-06-04 21:43:09,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 606.1ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:43:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-04 21:43:09,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-04 21:43:09,452 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) [2021-06-04 21:43:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-04 21:43:09,454 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-04 21:43:09,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:09,454 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-04 21:43:09,454 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) [2021-06-04 21:43:09,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-04 21:43:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:09,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:09,456 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] [2021-06-04 21:43:09,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-04 21:43:09,657 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:09,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-06-04 21:43:09,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:09,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996343288] [2021-06-04 21:43:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:09,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996343288] [2021-06-04 21:43:09,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996343288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:09,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726515081] [2021-06-04 21:43:09,827 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 [2021-06-04 21:43:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:09,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:09,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726515081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:10,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-04 21:43:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322347619] [2021-06-04 21:43:10,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:43:10,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:43:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:43:10,039 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) [2021-06-04 21:43:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:10,397 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-04 21:43:10,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:43:10,397 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 [2021-06-04 21:43:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:10,400 INFO L225 Difference]: With dead ends: 3364 [2021-06-04 21:43:10,400 INFO L226 Difference]: Without dead ends: 3030 [2021-06-04 21:43:10,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-04 21:43:10,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-04 21:43:10,419 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) [2021-06-04 21:43:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-04 21:43:10,422 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-04 21:43:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:10,422 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-04 21:43:10,422 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) [2021-06-04 21:43:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-04 21:43:10,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:10,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:10,424 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] [2021-06-04 21:43:10,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-04 21:43:10,624 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-06-04 21:43:10,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:10,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872074324] [2021-06-04 21:43:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:10,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872074324] [2021-06-04 21:43:10,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872074324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336897345] [2021-06-04 21:43:10,786 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 [2021-06-04 21:43:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:10,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:10,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:10,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336897345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:10,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:10,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:10,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862261752] [2021-06-04 21:43:10,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:10,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:10,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:10,987 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) [2021-06-04 21:43:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:11,299 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-04 21:43:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-04 21:43:11,299 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 [2021-06-04 21:43:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:11,303 INFO L225 Difference]: With dead ends: 4086 [2021-06-04 21:43:11,303 INFO L226 Difference]: Without dead ends: 3816 [2021-06-04 21:43:11,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 348.9ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:43:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-04 21:43:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-04 21:43:11,326 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) [2021-06-04 21:43:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-04 21:43:11,329 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-04 21:43:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:11,329 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-04 21:43:11,329 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) [2021-06-04 21:43:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-04 21:43:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:11,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:11,331 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] [2021-06-04 21:43:11,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-04 21:43:11,531 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:11,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:11,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-06-04 21:43:11,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:11,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542677118] [2021-06-04 21:43:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:11,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:11,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:11,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542677118] [2021-06-04 21:43:11,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542677118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:11,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445803903] [2021-06-04 21:43:11,697 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 [2021-06-04 21:43:11,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:11,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:11,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:11,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445803903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:11,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:11,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:11,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905565751] [2021-06-04 21:43:11,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:11,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:11,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:11,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:11,912 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) [2021-06-04 21:43:12,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:12,281 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-04 21:43:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:43:12,282 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 [2021-06-04 21:43:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:12,285 INFO L225 Difference]: With dead ends: 4046 [2021-06-04 21:43:12,285 INFO L226 Difference]: Without dead ends: 3776 [2021-06-04 21:43:12,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:43:12,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-04 21:43:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-04 21:43:12,308 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) [2021-06-04 21:43:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-04 21:43:12,310 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-04 21:43:12,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:12,311 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-04 21:43:12,311 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) [2021-06-04 21:43:12,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-04 21:43:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:12,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:12,312 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] [2021-06-04 21:43:12,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-04 21:43:12,513 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-06-04 21:43:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:12,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267263730] [2021-06-04 21:43:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:12,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:12,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267263730] [2021-06-04 21:43:12,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267263730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:12,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315728256] [2021-06-04 21:43:12,698 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 [2021-06-04 21:43:12,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:12,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:12,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:12,902 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:12,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315728256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:12,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:12,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:12,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905153656] [2021-06-04 21:43:12,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:12,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:12,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:12,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:12,903 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) [2021-06-04 21:43:13,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:13,237 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-04 21:43:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-04 21:43:13,237 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 [2021-06-04 21:43:13,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:13,241 INFO L225 Difference]: With dead ends: 4096 [2021-06-04 21:43:13,241 INFO L226 Difference]: Without dead ends: 3826 [2021-06-04 21:43:13,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-04 21:43:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-04 21:43:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-04 21:43:13,264 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) [2021-06-04 21:43:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-04 21:43:13,266 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-04 21:43:13,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:13,267 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-04 21:43:13,267 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) [2021-06-04 21:43:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-04 21:43:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:13,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:13,269 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] [2021-06-04 21:43:13,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-04 21:43:13,470 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:13,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:13,470 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-06-04 21:43:13,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:13,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661725160] [2021-06-04 21:43:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:13,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661725160] [2021-06-04 21:43:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661725160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905389337] [2021-06-04 21:43:13,633 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 [2021-06-04 21:43:13,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:13,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:13,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:13,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905389337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:13,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:13,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:13,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264503413] [2021-06-04 21:43:13,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:13,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:13,848 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) [2021-06-04 21:43:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:14,272 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-04 21:43:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:14,272 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 [2021-06-04 21:43:14,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:14,276 INFO L225 Difference]: With dead ends: 4121 [2021-06-04 21:43:14,276 INFO L226 Difference]: Without dead ends: 3851 [2021-06-04 21:43:14,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-04 21:43:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-04 21:43:14,312 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) [2021-06-04 21:43:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-04 21:43:14,315 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-04 21:43:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:14,315 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-04 21:43:14,315 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) [2021-06-04 21:43:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-04 21:43:14,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:14,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:14,317 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] [2021-06-04 21:43:14,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:14,518 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:14,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:14,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-06-04 21:43:14,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:14,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178428998] [2021-06-04 21:43:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:14,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178428998] [2021-06-04 21:43:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178428998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688073950] [2021-06-04 21:43:14,673 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 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 [2021-06-04 21:43:14,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:14,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:14,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:14,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:14,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688073950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:14,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:14,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:14,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478365004] [2021-06-04 21:43:14,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:14,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:14,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:14,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:14,865 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) [2021-06-04 21:43:15,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:15,241 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-04 21:43:15,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:43:15,242 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 [2021-06-04 21:43:15,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:15,245 INFO L225 Difference]: With dead ends: 4146 [2021-06-04 21:43:15,246 INFO L226 Difference]: Without dead ends: 3876 [2021-06-04 21:43:15,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:43:15,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-04 21:43:15,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-04 21:43:15,274 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) [2021-06-04 21:43:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-04 21:43:15,278 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-04 21:43:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-04 21:43:15,278 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) [2021-06-04 21:43:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-04 21:43:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:15,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:15,280 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] [2021-06-04 21:43:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-04 21:43:15,480 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-06-04 21:43:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471217024] [2021-06-04 21:43:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471217024] [2021-06-04 21:43:15,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471217024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547468178] [2021-06-04 21:43:15,635 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 [2021-06-04 21:43:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:15,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547468178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:15,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:15,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:15,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908514842] [2021-06-04 21:43:15,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:15,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:15,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:15,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:15,832 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) [2021-06-04 21:43:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:16,306 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-04 21:43:16,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:16,311 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 [2021-06-04 21:43:16,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:16,314 INFO L225 Difference]: With dead ends: 4171 [2021-06-04 21:43:16,314 INFO L226 Difference]: Without dead ends: 3901 [2021-06-04 21:43:16,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-04 21:43:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-04 21:43:16,343 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) [2021-06-04 21:43:16,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-04 21:43:16,347 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-04 21:43:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:16,347 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-04 21:43:16,347 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) [2021-06-04 21:43:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-04 21:43:16,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:16,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:16,349 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] [2021-06-04 21:43:16,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-04 21:43:16,550 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-06-04 21:43:16,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:16,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210073506] [2021-06-04 21:43:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:16,690 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:16,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210073506] [2021-06-04 21:43:16,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210073506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:16,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72459703] [2021-06-04 21:43:16,690 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 [2021-06-04 21:43:16,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:16,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:16,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:16,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:16,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72459703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:16,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:16,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:16,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12183447] [2021-06-04 21:43:16,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:16,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:16,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:16,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:16,879 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) [2021-06-04 21:43:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:17,269 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-04 21:43:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:17,270 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 [2021-06-04 21:43:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:17,273 INFO L225 Difference]: With dead ends: 4196 [2021-06-04 21:43:17,273 INFO L226 Difference]: Without dead ends: 3926 [2021-06-04 21:43:17,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-04 21:43:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-04 21:43:17,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-04 21:43:17,304 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) [2021-06-04 21:43:17,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-04 21:43:17,307 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-04 21:43:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:17,307 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-04 21:43:17,307 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) [2021-06-04 21:43:17,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-04 21:43:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:17,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:17,310 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] [2021-06-04 21:43:17,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:17,511 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:17,511 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-06-04 21:43:17,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:17,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259658499] [2021-06-04 21:43:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:17,658 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:17,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:17,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259658499] [2021-06-04 21:43:17,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259658499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:17,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798478923] [2021-06-04 21:43:17,658 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 [2021-06-04 21:43:17,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:43:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:17,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798478923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:17,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:17,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:17,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163603690] [2021-06-04 21:43:17,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:17,859 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) [2021-06-04 21:43:18,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:18,341 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-04 21:43:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:18,341 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 [2021-06-04 21:43:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:18,345 INFO L225 Difference]: With dead ends: 4221 [2021-06-04 21:43:18,345 INFO L226 Difference]: Without dead ends: 3951 [2021-06-04 21:43:18,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-04 21:43:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-04 21:43:18,377 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) [2021-06-04 21:43:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-04 21:43:18,381 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-04 21:43:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:18,381 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-04 21:43:18,381 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) [2021-06-04 21:43:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-04 21:43:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:18,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:18,384 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] [2021-06-04 21:43:18,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:18,584 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:18,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-06-04 21:43:18,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:18,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555586846] [2021-06-04 21:43:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555586846] [2021-06-04 21:43:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555586846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390806784] [2021-06-04 21:43:18,719 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 [2021-06-04 21:43:18,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:18,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:18,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:18,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:18,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390806784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:18,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:18,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:18,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071298628] [2021-06-04 21:43:18,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:18,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:18,901 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) [2021-06-04 21:43:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:19,325 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-04 21:43:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:19,325 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 [2021-06-04 21:43:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:19,329 INFO L225 Difference]: With dead ends: 4246 [2021-06-04 21:43:19,329 INFO L226 Difference]: Without dead ends: 3976 [2021-06-04 21:43:19,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-04 21:43:19,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-04 21:43:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-04 21:43:19,358 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) [2021-06-04 21:43:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-04 21:43:19,362 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-04 21:43:19,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:19,362 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-04 21:43:19,362 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) [2021-06-04 21:43:19,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-04 21:43:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:19,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:19,364 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] [2021-06-04 21:43:19,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:19,565 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:19,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-06-04 21:43:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:19,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720675251] [2021-06-04 21:43:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:19,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720675251] [2021-06-04 21:43:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720675251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635902653] [2021-06-04 21:43:19,704 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 [2021-06-04 21:43:19,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:19,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635902653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:19,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:19,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:19,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275892702] [2021-06-04 21:43:19,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:19,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:19,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:19,917 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) [2021-06-04 21:43:20,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:20,456 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-04 21:43:20,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:20,457 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 [2021-06-04 21:43:20,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:20,460 INFO L225 Difference]: With dead ends: 4271 [2021-06-04 21:43:20,460 INFO L226 Difference]: Without dead ends: 4001 [2021-06-04 21:43:20,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-04 21:43:20,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-04 21:43:20,489 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) [2021-06-04 21:43:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-04 21:43:20,493 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-04 21:43:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:20,493 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-04 21:43:20,493 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) [2021-06-04 21:43:20,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-04 21:43:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:20,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:20,495 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] [2021-06-04 21:43:20,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-04 21:43:20,695 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:20,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:20,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-06-04 21:43:20,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:20,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963106809] [2021-06-04 21:43:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:20,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:20,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963106809] [2021-06-04 21:43:20,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963106809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:20,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105420846] [2021-06-04 21:43:20,827 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 [2021-06-04 21:43:20,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:43:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:21,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105420846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:21,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:21,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:21,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335199149] [2021-06-04 21:43:21,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:21,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:21,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:21,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:21,026 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) [2021-06-04 21:43:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:21,506 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-04 21:43:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:21,506 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 [2021-06-04 21:43:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:21,509 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:21,509 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:21,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 466.6ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:43:21,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:21,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-04 21:43:21,538 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) [2021-06-04 21:43:21,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-04 21:43:21,541 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-04 21:43:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:21,541 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-04 21:43:21,541 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) [2021-06-04 21:43:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-04 21:43:21,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:21,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:21,544 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] [2021-06-04 21:43:21,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-04 21:43:21,753 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-06-04 21:43:21,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:21,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105105859] [2021-06-04 21:43:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:21,905 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:21,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105105859] [2021-06-04 21:43:21,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105105859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:21,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920714191] [2021-06-04 21:43:21,906 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 [2021-06-04 21:43:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:21,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:21,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920714191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:22,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:22,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:22,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249209444] [2021-06-04 21:43:22,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:22,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:22,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:22,121 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) [2021-06-04 21:43:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:22,713 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-04 21:43:22,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:22,713 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 [2021-06-04 21:43:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:22,717 INFO L225 Difference]: With dead ends: 4321 [2021-06-04 21:43:22,717 INFO L226 Difference]: Without dead ends: 4051 [2021-06-04 21:43:22,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-04 21:43:22,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-04 21:43:22,752 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) [2021-06-04 21:43:22,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-04 21:43:22,756 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-04 21:43:22,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:22,756 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-04 21:43:22,756 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) [2021-06-04 21:43:22,756 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-04 21:43:22,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:22,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:22,759 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] [2021-06-04 21:43:22,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:22,959 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:22,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-06-04 21:43:22,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:22,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791844854] [2021-06-04 21:43:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791844854] [2021-06-04 21:43:23,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791844854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228754696] [2021-06-04 21:43:23,092 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 [2021-06-04 21:43:23,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:23,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:23,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:23,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228754696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:23,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:23,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:23,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843159365] [2021-06-04 21:43:23,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:23,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:23,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:23,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:23,289 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) [2021-06-04 21:43:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:23,788 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-04 21:43:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:23,788 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 [2021-06-04 21:43:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:23,792 INFO L225 Difference]: With dead ends: 4391 [2021-06-04 21:43:23,792 INFO L226 Difference]: Without dead ends: 4121 [2021-06-04 21:43:23,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:43:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-04 21:43:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-04 21:43:23,828 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) [2021-06-04 21:43:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-04 21:43:23,833 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-04 21:43:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:23,833 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-04 21:43:23,833 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) [2021-06-04 21:43:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-04 21:43:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:23,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:23,836 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] [2021-06-04 21:43:24,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-04 21:43:24,037 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:24,037 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-06-04 21:43:24,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:24,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074672996] [2021-06-04 21:43:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:24,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074672996] [2021-06-04 21:43:24,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074672996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:24,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186157604] [2021-06-04 21:43:24,172 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 [2021-06-04 21:43:24,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:24,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186157604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:24,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:24,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:24,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530330634] [2021-06-04 21:43:24,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:24,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:24,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:24,369 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) [2021-06-04 21:43:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:25,056 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-04 21:43:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:25,057 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 [2021-06-04 21:43:25,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:25,060 INFO L225 Difference]: With dead ends: 4969 [2021-06-04 21:43:25,060 INFO L226 Difference]: Without dead ends: 4346 [2021-06-04 21:43:25,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:43:25,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-04 21:43:25,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-04 21:43:25,091 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) [2021-06-04 21:43:25,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-04 21:43:25,096 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-04 21:43:25,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:25,096 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-04 21:43:25,096 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) [2021-06-04 21:43:25,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-04 21:43:25,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:25,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:25,099 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] [2021-06-04 21:43:25,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-04 21:43:25,304 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-06-04 21:43:25,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:25,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901457288] [2021-06-04 21:43:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901457288] [2021-06-04 21:43:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901457288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18679691] [2021-06-04 21:43:25,433 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 [2021-06-04 21:43:25,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:25,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:25,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:25,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18679691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:25,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:25,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-04 21:43:25,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986103576] [2021-06-04 21:43:25,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-04 21:43:25,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:25,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-04 21:43:25,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-04 21:43:25,629 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) [2021-06-04 21:43:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:26,158 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-04 21:43:26,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:26,158 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 [2021-06-04 21:43:26,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:26,163 INFO L225 Difference]: With dead ends: 5198 [2021-06-04 21:43:26,163 INFO L226 Difference]: Without dead ends: 4928 [2021-06-04 21:43:26,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:43:26,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-04 21:43:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-04 21:43:26,197 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) [2021-06-04 21:43:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-04 21:43:26,201 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-04 21:43:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:26,201 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-04 21:43:26,201 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) [2021-06-04 21:43:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-04 21:43:26,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-04 21:43:26,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:26,204 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] [2021-06-04 21:43:26,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-04 21:43:26,404 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:26,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:26,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-06-04 21:43:26,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:26,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187433380] [2021-06-04 21:43:26,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:26,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:26,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187433380] [2021-06-04 21:43:26,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187433380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035564241] [2021-06-04 21:43:26,533 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 [2021-06-04 21:43:26,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:26,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-04 21:43:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:26,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035564241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:26,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:26,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-04 21:43:26,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723297758] [2021-06-04 21:43:26,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:26,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:26,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:26,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:26,722 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) [2021-06-04 21:43:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:27,460 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-04 21:43:27,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:43:27,460 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 [2021-06-04 21:43:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:27,465 INFO L225 Difference]: With dead ends: 5021 [2021-06-04 21:43:27,465 INFO L226 Difference]: Without dead ends: 4446 [2021-06-04 21:43:27,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 692.0ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:43:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-04 21:43:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-04 21:43:27,495 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) [2021-06-04 21:43:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-04 21:43:27,498 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-04 21:43:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:27,498 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-04 21:43:27,498 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) [2021-06-04 21:43:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-04 21:43:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:27,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:27,500 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] [2021-06-04 21:43:27,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:27,700 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-06-04 21:43:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:27,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628453221] [2021-06-04 21:43:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:27,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:27,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628453221] [2021-06-04 21:43:27,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628453221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:27,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139481045] [2021-06-04 21:43:27,871 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 [2021-06-04 21:43:27,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:27,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:28,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139481045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:28,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:28,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:28,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4828208] [2021-06-04 21:43:28,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:28,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:28,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:28,078 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 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) [2021-06-04 21:43:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:28,431 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-04 21:43:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:43:28,431 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 [2021-06-04 21:43:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:28,435 INFO L225 Difference]: With dead ends: 3821 [2021-06-04 21:43:28,435 INFO L226 Difference]: Without dead ends: 3551 [2021-06-04 21:43:28,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 382.0ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-06-04 21:43:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-04 21:43:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-04 21:43:28,471 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) [2021-06-04 21:43:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-04 21:43:28,474 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-04 21:43:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:28,474 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-04 21:43:28,474 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) [2021-06-04 21:43:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-04 21:43:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:28,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:28,476 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] [2021-06-04 21:43:28,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:28,676 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-06-04 21:43:28,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:28,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551771451] [2021-06-04 21:43:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:28,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:28,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551771451] [2021-06-04 21:43:28,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551771451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:28,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154999366] [2021-06-04 21:43:28,855 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 [2021-06-04 21:43:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:28,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154999366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:29,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850252385] [2021-06-04 21:43:29,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:29,062 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:29,442 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-04 21:43:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:29,446 INFO L225 Difference]: With dead ends: 4241 [2021-06-04 21:43:29,446 INFO L226 Difference]: Without dead ends: 3971 [2021-06-04 21:43:29,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-04 21:43:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-04 21:43:29,470 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) [2021-06-04 21:43:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-04 21:43:29,473 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-04 21:43:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:29,473 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-04 21:43:29,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-04 21:43:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:29,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:29,475 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] [2021-06-04 21:43:29,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:29,676 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-06-04 21:43:29,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:29,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447118852] [2021-06-04 21:43:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:29,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:29,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447118852] [2021-06-04 21:43:29,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447118852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:29,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285262639] [2021-06-04 21:43:29,824 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 [2021-06-04 21:43:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:29,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285262639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:30,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:30,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610140186] [2021-06-04 21:43:30,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:30,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:30,015 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 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) [2021-06-04 21:43:30,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:30,384 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-04 21:43:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:30,384 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 [2021-06-04 21:43:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:30,388 INFO L225 Difference]: With dead ends: 4271 [2021-06-04 21:43:30,388 INFO L226 Difference]: Without dead ends: 4001 [2021-06-04 21:43:30,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 384.4ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-04 21:43:30,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-04 21:43:30,412 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) [2021-06-04 21:43:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-04 21:43:30,415 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-04 21:43:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:30,415 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-04 21:43:30,415 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) [2021-06-04 21:43:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-04 21:43:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:30,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:30,417 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] [2021-06-04 21:43:30,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-04 21:43:30,618 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:30,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:30,618 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-06-04 21:43:30,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:30,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977130523] [2021-06-04 21:43:30,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977130523] [2021-06-04 21:43:30,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977130523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123934363] [2021-06-04 21:43:30,789 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 [2021-06-04 21:43:30,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:30,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:43:30,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:30,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123934363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:30,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:30,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:30,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086839466] [2021-06-04 21:43:30,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:30,995 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:31,435 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-04 21:43:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:31,438 INFO L225 Difference]: With dead ends: 4296 [2021-06-04 21:43:31,438 INFO L226 Difference]: Without dead ends: 4026 [2021-06-04 21:43:31,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 484.1ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:31,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-04 21:43:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-04 21:43:31,463 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) [2021-06-04 21:43:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-04 21:43:31,466 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-04 21:43:31,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:31,466 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-04 21:43:31,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:31,467 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-04 21:43:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:31,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:31,469 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] [2021-06-04 21:43:31,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:31,669 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-06-04 21:43:31,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:31,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413881099] [2021-06-04 21:43:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:31,826 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:31,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413881099] [2021-06-04 21:43:31,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413881099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:31,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769113499] [2021-06-04 21:43:31,826 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 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 [2021-06-04 21:43:31,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:31,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:32,044 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:32,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769113499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:32,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:32,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:32,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224342491] [2021-06-04 21:43:32,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:32,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:32,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:32,045 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 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) [2021-06-04 21:43:32,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:32,445 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-04 21:43:32,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:32,445 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 [2021-06-04 21:43:32,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:32,449 INFO L225 Difference]: With dead ends: 4321 [2021-06-04 21:43:32,449 INFO L226 Difference]: Without dead ends: 4051 [2021-06-04 21:43:32,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:32,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-04 21:43:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-04 21:43:32,477 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) [2021-06-04 21:43:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-04 21:43:32,481 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-04 21:43:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:32,481 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-04 21:43:32,481 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) [2021-06-04 21:43:32,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-04 21:43:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:32,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:32,483 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] [2021-06-04 21:43:32,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-04 21:43:32,683 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-06-04 21:43:32,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:32,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262134375] [2021-06-04 21:43:32,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:32,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262134375] [2021-06-04 21:43:32,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262134375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:32,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979071014] [2021-06-04 21:43:32,847 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 [2021-06-04 21:43:32,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:32,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:33,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979071014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:33,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:33,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:33,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736912511] [2021-06-04 21:43:33,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:33,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:33,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:33,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:33,057 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:33,553 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-04 21:43:33,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:33,554 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:33,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:33,558 INFO L225 Difference]: With dead ends: 4346 [2021-06-04 21:43:33,558 INFO L226 Difference]: Without dead ends: 4076 [2021-06-04 21:43:33,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-04 21:43:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-04 21:43:33,588 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) [2021-06-04 21:43:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-04 21:43:33,592 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-04 21:43:33,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:33,592 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-04 21:43:33,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-04 21:43:33,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:33,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:33,594 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] [2021-06-04 21:43:33,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:33,805 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:33,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:33,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-06-04 21:43:33,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:33,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962398142] [2021-06-04 21:43:33,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:33,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:33,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962398142] [2021-06-04 21:43:33,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962398142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:33,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991178537] [2021-06-04 21:43:33,970 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 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 [2021-06-04 21:43:34,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:34,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:34,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:34,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991178537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:34,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:34,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:34,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410580164] [2021-06-04 21:43:34,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:34,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:34,168 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 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) [2021-06-04 21:43:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:34,615 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-04 21:43:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:34,615 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 [2021-06-04 21:43:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:34,619 INFO L225 Difference]: With dead ends: 4371 [2021-06-04 21:43:34,619 INFO L226 Difference]: Without dead ends: 4101 [2021-06-04 21:43:34,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-04 21:43:34,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-04 21:43:34,649 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) [2021-06-04 21:43:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-04 21:43:34,653 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-04 21:43:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:34,653 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-04 21:43:34,653 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) [2021-06-04 21:43:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-04 21:43:34,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:34,655 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:34,655 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] [2021-06-04 21:43:34,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-04 21:43:34,856 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:34,856 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-06-04 21:43:34,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:34,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659971921] [2021-06-04 21:43:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:35,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659971921] [2021-06-04 21:43:35,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659971921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123988350] [2021-06-04 21:43:35,015 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 [2021-06-04 21:43:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123988350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:35,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:35,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:35,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729757186] [2021-06-04 21:43:35,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:35,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:35,218 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:35,806 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-04 21:43:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:35,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:35,810 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:35,810 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:35,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:35,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:35,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-04 21:43:35,841 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) [2021-06-04 21:43:35,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-04 21:43:35,844 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-04 21:43:35,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:35,845 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-04 21:43:35,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:35,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-04 21:43:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:35,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:35,847 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] [2021-06-04 21:43:36,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-04 21:43:36,063 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-06-04 21:43:36,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:36,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254461916] [2021-06-04 21:43:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:36,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254461916] [2021-06-04 21:43:36,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254461916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:36,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422378128] [2021-06-04 21:43:36,208 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 [2021-06-04 21:43:36,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:36,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:36,413 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:36,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422378128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:36,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:36,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:36,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701440649] [2021-06-04 21:43:36,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:36,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:36,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:36,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:36,414 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 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) [2021-06-04 21:43:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:36,893 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-04 21:43:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:36,893 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 [2021-06-04 21:43:36,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:36,897 INFO L225 Difference]: With dead ends: 4421 [2021-06-04 21:43:36,897 INFO L226 Difference]: Without dead ends: 4151 [2021-06-04 21:43:36,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 467.4ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-04 21:43:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-04 21:43:36,931 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) [2021-06-04 21:43:36,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-04 21:43:36,935 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-04 21:43:36,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:36,935 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-04 21:43:36,936 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) [2021-06-04 21:43:36,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-04 21:43:36,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:36,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:36,938 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] [2021-06-04 21:43:37,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:37,154 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-06-04 21:43:37,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:37,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478604477] [2021-06-04 21:43:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:37,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:37,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478604477] [2021-06-04 21:43:37,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478604477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:37,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128965437] [2021-06-04 21:43:37,317 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 [2021-06-04 21:43:37,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:37,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:43:37,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:37,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128965437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:37,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:37,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993823232] [2021-06-04 21:43:37,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:37,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:37,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:37,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:37,568 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:38,196 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-04 21:43:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:38,196 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:38,200 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:38,200 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:38,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 596.6ms TimeCoverageRelationStatistics Valid=715, Invalid=2365, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:43:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-04 21:43:38,233 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) [2021-06-04 21:43:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-04 21:43:38,237 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-04 21:43:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:38,237 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-04 21:43:38,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-04 21:43:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:38,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:38,239 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] [2021-06-04 21:43:38,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-04 21:43:38,449 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:38,449 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-06-04 21:43:38,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:38,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973159432] [2021-06-04 21:43:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:38,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973159432] [2021-06-04 21:43:38,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973159432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591377245] [2021-06-04 21:43:38,590 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 [2021-06-04 21:43:38,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:38,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:38,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:38,781 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:38,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591377245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:38,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:38,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:38,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460064904] [2021-06-04 21:43:38,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:38,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:38,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:38,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:38,781 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 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) [2021-06-04 21:43:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:39,292 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-04 21:43:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:43:39,292 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 [2021-06-04 21:43:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:39,296 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:43:39,296 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:43:39,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 478.4ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:43:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:43:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-04 21:43:39,334 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) [2021-06-04 21:43:39,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-04 21:43:39,338 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-04 21:43:39,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:39,338 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-04 21:43:39,338 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) [2021-06-04 21:43:39,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-04 21:43:39,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:39,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:39,340 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] [2021-06-04 21:43:39,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:39,556 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:39,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-06-04 21:43:39,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:39,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829003123] [2021-06-04 21:43:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:39,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:39,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829003123] [2021-06-04 21:43:39,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829003123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:39,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467208562] [2021-06-04 21:43:39,700 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 [2021-06-04 21:43:39,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-04 21:43:39,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:39,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467208562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:39,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:39,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:39,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206633434] [2021-06-04 21:43:39,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:39,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:39,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:39,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:39,911 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:40,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:40,581 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-04 21:43:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:40,582 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:40,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:40,586 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:43:40,586 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:43:40,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 635.3ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:43:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:43:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-04 21:43:40,619 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) [2021-06-04 21:43:40,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-04 21:43:40,623 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-04 21:43:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:40,623 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-04 21:43:40,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:40,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-04 21:43:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:40,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:40,625 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] [2021-06-04 21:43:40,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:40,826 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-06-04 21:43:40,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:40,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991200917] [2021-06-04 21:43:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:40,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:40,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:40,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991200917] [2021-06-04 21:43:40,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991200917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:40,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522994012] [2021-06-04 21:43:40,966 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 [2021-06-04 21:43:41,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-04 21:43:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:43:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:41,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522994012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:41,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:41,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:41,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481920194] [2021-06-04 21:43:41,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:41,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:41,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:41,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:41,172 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 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) [2021-06-04 21:43:41,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:41,705 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-04 21:43:41,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:43:41,705 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 [2021-06-04 21:43:41,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:41,709 INFO L225 Difference]: With dead ends: 4566 [2021-06-04 21:43:41,709 INFO L226 Difference]: Without dead ends: 4296 [2021-06-04 21:43:41,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 504.3ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:43:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-04 21:43:41,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-04 21:43:41,741 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) [2021-06-04 21:43:41,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-04 21:43:41,745 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-04 21:43:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:41,745 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-04 21:43:41,745 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) [2021-06-04 21:43:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-04 21:43:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:41,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:41,748 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] [2021-06-04 21:43:41,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:41,948 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-06-04 21:43:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:41,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671109254] [2021-06-04 21:43:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:42,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671109254] [2021-06-04 21:43:42,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671109254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:42,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519693997] [2021-06-04 21:43:42,099 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 [2021-06-04 21:43:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-04 21:43:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:42,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519693997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:42,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:42,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:42,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774768282] [2021-06-04 21:43:42,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:42,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:42,295 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:43,045 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-04 21:43:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:43:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:43,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:43,049 INFO L225 Difference]: With dead ends: 5144 [2021-06-04 21:43:43,049 INFO L226 Difference]: Without dead ends: 4521 [2021-06-04 21:43:43,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 699.2ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:43:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-04 21:43:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-04 21:43:43,080 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) [2021-06-04 21:43:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-04 21:43:43,085 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-04 21:43:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:43,085 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-04 21:43:43,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-04 21:43:43,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:43,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:43,088 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] [2021-06-04 21:43:43,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:43,289 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:43,289 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-06-04 21:43:43,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:43,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16115106] [2021-06-04 21:43:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:43,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:43,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16115106] [2021-06-04 21:43:43,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16115106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:43,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128429028] [2021-06-04 21:43:43,436 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 [2021-06-04 21:43:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:43,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128429028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:43,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:43,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-04 21:43:43,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016722386] [2021-06-04 21:43:43,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:43,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:43,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:43,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:43,618 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 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) [2021-06-04 21:43:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:44,171 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-04 21:43:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:43:44,172 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 [2021-06-04 21:43:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:44,177 INFO L225 Difference]: With dead ends: 5348 [2021-06-04 21:43:44,177 INFO L226 Difference]: Without dead ends: 5078 [2021-06-04 21:43:44,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:43:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-04 21:43:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-04 21:43:44,211 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) [2021-06-04 21:43:44,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-04 21:43:44,215 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-04 21:43:44,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:44,215 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-04 21:43:44,215 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) [2021-06-04 21:43:44,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-04 21:43:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-04 21:43:44,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:44,218 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] [2021-06-04 21:43:44,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-04 21:43:44,418 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-06-04 21:43:44,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:44,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837587129] [2021-06-04 21:43:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:44,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:44,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837587129] [2021-06-04 21:43:44,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837587129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:44,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442274440] [2021-06-04 21:43:44,579 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 [2021-06-04 21:43:44,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-04 21:43:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:44,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:44,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:44,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442274440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:44,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:44,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-04 21:43:44,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514413802] [2021-06-04 21:43:44,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:44,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:44,786 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) [2021-06-04 21:43:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:45,527 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-04 21:43:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:43:45,528 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 [2021-06-04 21:43:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:45,532 INFO L225 Difference]: With dead ends: 5216 [2021-06-04 21:43:45,532 INFO L226 Difference]: Without dead ends: 4641 [2021-06-04 21:43:45,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:43:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-04 21:43:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-04 21:43:45,558 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) [2021-06-04 21:43:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-04 21:43:45,561 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-04 21:43:45,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:45,561 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-04 21:43:45,561 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) [2021-06-04 21:43:45,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-04 21:43:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:45,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:45,563 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] [2021-06-04 21:43:45,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-04 21:43:45,765 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:45,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:45,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-06-04 21:43:45,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:45,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577279100] [2021-06-04 21:43:45,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:45,959 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:45,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577279100] [2021-06-04 21:43:45,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577279100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:45,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869665321] [2021-06-04 21:43:45,959 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 [2021-06-04 21:43:46,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:43:46,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:46,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869665321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:46,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:46,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-04 21:43:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198566808] [2021-06-04 21:43:46,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:43:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:43:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:43:46,203 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 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) [2021-06-04 21:43:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:46,600 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-04 21:43:46,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:46,600 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 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 120 [2021-06-04 21:43:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:46,604 INFO L225 Difference]: With dead ends: 3614 [2021-06-04 21:43:46,604 INFO L226 Difference]: Without dead ends: 3280 [2021-06-04 21:43:46,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 462.7ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-04 21:43:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-04 21:43:46,626 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) [2021-06-04 21:43:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-04 21:43:46,629 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-04 21:43:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:46,629 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-04 21:43:46,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 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) [2021-06-04 21:43:46,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-04 21:43:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:46,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:46,631 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] [2021-06-04 21:43:46,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-04 21:43:46,831 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-06-04 21:43:46,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:46,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023801626] [2021-06-04 21:43:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:47,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023801626] [2021-06-04 21:43:47,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023801626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:47,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179639137] [2021-06-04 21:43:47,023 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 [2021-06-04 21:43:47,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:47,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:47,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:47,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:47,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179639137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:47,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:47,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:47,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478956627] [2021-06-04 21:43:47,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:47,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:47,223 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:47,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:47,538 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-04 21:43:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-04 21:43:47,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:47,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:47,542 INFO L225 Difference]: With dead ends: 4436 [2021-06-04 21:43:47,542 INFO L226 Difference]: Without dead ends: 4166 [2021-06-04 21:43:47,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-04 21:43:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-04 21:43:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-04 21:43:47,566 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) [2021-06-04 21:43:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-04 21:43:47,569 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-04 21:43:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:47,569 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-04 21:43:47,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:47,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-04 21:43:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:47,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:47,571 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] [2021-06-04 21:43:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-04 21:43:47,772 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:47,772 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-06-04 21:43:47,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:47,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863216959] [2021-06-04 21:43:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863216959] [2021-06-04 21:43:47,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863216959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164160137] [2021-06-04 21:43:47,982 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 [2021-06-04 21:43:48,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:48,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:48,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164160137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:48,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:48,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827088436] [2021-06-04 21:43:48,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:48,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:48,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:48,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:48,200 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 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) [2021-06-04 21:43:48,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:48,590 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-04 21:43:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:43:48,590 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 [2021-06-04 21:43:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:48,594 INFO L225 Difference]: With dead ends: 4396 [2021-06-04 21:43:48,594 INFO L226 Difference]: Without dead ends: 4126 [2021-06-04 21:43:48,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-04 21:43:48,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-04 21:43:48,620 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) [2021-06-04 21:43:48,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-04 21:43:48,623 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-04 21:43:48,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:48,623 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-04 21:43:48,623 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) [2021-06-04 21:43:48,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-04 21:43:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:48,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:48,625 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] [2021-06-04 21:43:48,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-04 21:43:48,826 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-06-04 21:43:48,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:48,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534870016] [2021-06-04 21:43:48,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:49,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534870016] [2021-06-04 21:43:49,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534870016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:49,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32308857] [2021-06-04 21:43:49,003 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 [2021-06-04 21:43:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:49,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:49,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32308857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:49,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:49,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:49,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783101197] [2021-06-04 21:43:49,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:49,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:49,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:49,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:49,200 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:49,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:49,562 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-04 21:43:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-04 21:43:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:49,566 INFO L225 Difference]: With dead ends: 4446 [2021-06-04 21:43:49,566 INFO L226 Difference]: Without dead ends: 4176 [2021-06-04 21:43:49,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 401.6ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-04 21:43:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-04 21:43:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-04 21:43:49,603 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) [2021-06-04 21:43:49,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-04 21:43:49,607 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-04 21:43:49,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:49,607 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-04 21:43:49,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:49,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-04 21:43:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:49,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:49,609 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] [2021-06-04 21:43:49,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-04 21:43:49,809 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-06-04 21:43:49,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:49,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40114839] [2021-06-04 21:43:49,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40114839] [2021-06-04 21:43:50,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40114839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010891748] [2021-06-04 21:43:50,001 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 [2021-06-04 21:43:50,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:50,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010891748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:50,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:50,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:50,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459772227] [2021-06-04 21:43:50,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:50,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:50,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:50,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:50,209 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 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) [2021-06-04 21:43:50,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:50,656 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-04 21:43:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:43:50,656 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 [2021-06-04 21:43:50,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:50,660 INFO L225 Difference]: With dead ends: 4471 [2021-06-04 21:43:50,660 INFO L226 Difference]: Without dead ends: 4201 [2021-06-04 21:43:50,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 488.9ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-04 21:43:50,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-04 21:43:50,687 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) [2021-06-04 21:43:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-04 21:43:50,690 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-04 21:43:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:50,691 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-04 21:43:50,691 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) [2021-06-04 21:43:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-04 21:43:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:50,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:50,693 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] [2021-06-04 21:43:50,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:50,893 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:50,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-06-04 21:43:50,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:50,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367786079] [2021-06-04 21:43:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:51,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:51,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367786079] [2021-06-04 21:43:51,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367786079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:51,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474288783] [2021-06-04 21:43:51,088 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 [2021-06-04 21:43:51,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:51,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:43:51,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:51,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474288783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:51,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:51,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:51,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376459039] [2021-06-04 21:43:51,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:51,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:51,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:51,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:51,282 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:51,678 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-04 21:43:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:43:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:51,682 INFO L225 Difference]: With dead ends: 4496 [2021-06-04 21:43:51,683 INFO L226 Difference]: Without dead ends: 4226 [2021-06-04 21:43:51,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 437.8ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:43:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-04 21:43:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-04 21:43:51,712 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) [2021-06-04 21:43:51,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-04 21:43:51,716 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-04 21:43:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:51,716 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-04 21:43:51,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-04 21:43:51,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:51,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:51,718 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] [2021-06-04 21:43:51,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:51,920 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-06-04 21:43:51,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:51,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104136320] [2021-06-04 21:43:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:52,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104136320] [2021-06-04 21:43:52,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104136320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:52,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546380198] [2021-06-04 21:43:52,121 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 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 [2021-06-04 21:43:52,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:52,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546380198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:52,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:52,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:52,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595873161] [2021-06-04 21:43:52,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:52,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:52,335 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 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) [2021-06-04 21:43:52,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:52,834 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-04 21:43:52,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:43:52,834 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 [2021-06-04 21:43:52,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:52,838 INFO L225 Difference]: With dead ends: 4521 [2021-06-04 21:43:52,838 INFO L226 Difference]: Without dead ends: 4251 [2021-06-04 21:43:52,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:52,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-04 21:43:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-04 21:43:52,867 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) [2021-06-04 21:43:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-04 21:43:52,871 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-04 21:43:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:52,871 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-04 21:43:52,871 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) [2021-06-04 21:43:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-04 21:43:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:52,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:52,873 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] [2021-06-04 21:43:53,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:53,074 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:53,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:53,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-06-04 21:43:53,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:53,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293481850] [2021-06-04 21:43:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:53,290 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:53,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293481850] [2021-06-04 21:43:53,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293481850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:53,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037392614] [2021-06-04 21:43:53,290 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 [2021-06-04 21:43:53,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:43:53,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:53,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:53,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:53,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037392614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:53,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:53,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:53,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324719709] [2021-06-04 21:43:53,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:53,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:53,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:53,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:53,487 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:53,932 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-04 21:43:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:43:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:53,936 INFO L225 Difference]: With dead ends: 4546 [2021-06-04 21:43:53,936 INFO L226 Difference]: Without dead ends: 4276 [2021-06-04 21:43:53,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:43:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-04 21:43:53,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-04 21:43:53,965 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) [2021-06-04 21:43:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-04 21:43:53,969 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-04 21:43:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:53,969 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-04 21:43:53,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-04 21:43:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:53,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:53,971 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] [2021-06-04 21:43:54,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:54,172 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:54,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-06-04 21:43:54,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:54,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118397358] [2021-06-04 21:43:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118397358] [2021-06-04 21:43:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118397358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942147555] [2021-06-04 21:43:54,352 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 [2021-06-04 21:43:54,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:43:54,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:54,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:54,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:54,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942147555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:54,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:54,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:54,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16982411] [2021-06-04 21:43:54,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:54,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:54,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:54,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:54,568 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 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) [2021-06-04 21:43:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:55,122 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-04 21:43:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:43:55,123 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 [2021-06-04 21:43:55,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:55,127 INFO L225 Difference]: With dead ends: 4571 [2021-06-04 21:43:55,127 INFO L226 Difference]: Without dead ends: 4301 [2021-06-04 21:43:55,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:55,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-04 21:43:55,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-04 21:43:55,160 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) [2021-06-04 21:43:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-04 21:43:55,164 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-04 21:43:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:55,164 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-04 21:43:55,164 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) [2021-06-04 21:43:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-04 21:43:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:55,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:55,167 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] [2021-06-04 21:43:55,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:55,367 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:55,367 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-06-04 21:43:55,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:55,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969714335] [2021-06-04 21:43:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:55,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:55,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969714335] [2021-06-04 21:43:55,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969714335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:55,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655081865] [2021-06-04 21:43:55,515 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 [2021-06-04 21:43:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:55,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:55,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:55,698 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:55,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655081865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:55,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:55,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:55,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591029809] [2021-06-04 21:43:55,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:55,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:55,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:55,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:55,699 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:56,193 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-04 21:43:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:43:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:56,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:56,197 INFO L225 Difference]: With dead ends: 4596 [2021-06-04 21:43:56,197 INFO L226 Difference]: Without dead ends: 4326 [2021-06-04 21:43:56,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 452.8ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:43:56,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-04 21:43:56,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-04 21:43:56,232 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) [2021-06-04 21:43:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-04 21:43:56,236 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-04 21:43:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-04 21:43:56,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-04 21:43:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:56,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:56,238 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] [2021-06-04 21:43:56,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:56,439 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-06-04 21:43:56,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:56,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529390683] [2021-06-04 21:43:56,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:56,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:56,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529390683] [2021-06-04 21:43:56,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529390683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:56,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561684928] [2021-06-04 21:43:56,604 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 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 [2021-06-04 21:43:56,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:43:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:56,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:56,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:56,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561684928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:56,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:56,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015558565] [2021-06-04 21:43:56,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:56,818 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 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) [2021-06-04 21:43:57,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:57,438 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-04 21:43:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:43:57,438 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 [2021-06-04 21:43:57,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:57,443 INFO L225 Difference]: With dead ends: 4621 [2021-06-04 21:43:57,443 INFO L226 Difference]: Without dead ends: 4351 [2021-06-04 21:43:57,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:43:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-04 21:43:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-04 21:43:57,479 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) [2021-06-04 21:43:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-04 21:43:57,483 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-04 21:43:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:57,483 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-04 21:43:57,483 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) [2021-06-04 21:43:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-04 21:43:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:57,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:57,486 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] [2021-06-04 21:43:57,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:43:57,688 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:57,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-06-04 21:43:57,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:57,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199569382] [2021-06-04 21:43:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199569382] [2021-06-04 21:43:57,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199569382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365740214] [2021-06-04 21:43:57,839 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 [2021-06-04 21:43:57,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:43:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:57,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:43:57,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365740214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:58,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:43:58,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174317590] [2021-06-04 21:43:58,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:43:58,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:58,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:43:58,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:43:58,022 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:58,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:58,523 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-04 21:43:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:43:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:43:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:58,527 INFO L225 Difference]: With dead ends: 4646 [2021-06-04 21:43:58,527 INFO L226 Difference]: Without dead ends: 4376 [2021-06-04 21:43:58,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 490.6ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:43:58,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-04 21:43:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-04 21:43:58,563 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) [2021-06-04 21:43:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-04 21:43:58,568 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-04 21:43:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:58,568 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-04 21:43:58,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:43:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-04 21:43:58,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:58,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:58,571 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] [2021-06-04 21:43:58,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-04 21:43:58,771 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:43:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:43:58,772 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-06-04 21:43:58,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:43:58,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47433094] [2021-06-04 21:43:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:43:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:43:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:58,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:43:58,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47433094] [2021-06-04 21:43:58,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47433094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:58,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851592140] [2021-06-04 21:43:58,932 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 [2021-06-04 21:43:58,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:43:58,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:43:58,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:43:58,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:43:59,123 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:43:59,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851592140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:43:59,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:43:59,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:43:59,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381744187] [2021-06-04 21:43:59,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:43:59,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:43:59,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:43:59,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:43:59,124 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 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) [2021-06-04 21:43:59,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:43:59,766 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-04 21:43:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:43:59,767 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 [2021-06-04 21:43:59,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:43:59,771 INFO L225 Difference]: With dead ends: 4671 [2021-06-04 21:43:59,771 INFO L226 Difference]: Without dead ends: 4401 [2021-06-04 21:43:59,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:43:59,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-04 21:43:59,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-04 21:43:59,802 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) [2021-06-04 21:43:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-04 21:43:59,806 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-04 21:43:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:43:59,806 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-04 21:43:59,806 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) [2021-06-04 21:43:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-04 21:43:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:43:59,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:43:59,808 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] [2021-06-04 21:44:00,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-04 21:44:00,009 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-06-04 21:44:00,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:00,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365982872] [2021-06-04 21:44:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:00,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365982872] [2021-06-04 21:44:00,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365982872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607125557] [2021-06-04 21:44:00,177 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 [2021-06-04 21:44:00,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:00,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:44:00,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:00,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607125557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:00,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:44:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469059537] [2021-06-04 21:44:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:44:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:44:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:44:00,376 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:00,930 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-04 21:44:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:44:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:00,934 INFO L225 Difference]: With dead ends: 4696 [2021-06-04 21:44:00,934 INFO L226 Difference]: Without dead ends: 4426 [2021-06-04 21:44:00,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-04 21:44:00,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-04 21:44:00,968 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) [2021-06-04 21:44:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-04 21:44:00,972 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-04 21:44:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:00,972 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-04 21:44:00,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:00,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-04 21:44:00,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:44:00,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:00,975 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] [2021-06-04 21:44:01,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-04 21:44:01,175 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:01,176 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-06-04 21:44:01,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:01,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796628490] [2021-06-04 21:44:01,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:01,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:01,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796628490] [2021-06-04 21:44:01,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796628490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:01,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753214869] [2021-06-04 21:44:01,343 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 [2021-06-04 21:44:01,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:01,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:44:01,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:01,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753214869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:01,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:01,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:44:01,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889241955] [2021-06-04 21:44:01,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:01,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:01,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:01,552 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 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) [2021-06-04 21:44:02,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:02,215 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-04 21:44:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:02,215 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 [2021-06-04 21:44:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:02,222 INFO L225 Difference]: With dead ends: 4721 [2021-06-04 21:44:02,222 INFO L226 Difference]: Without dead ends: 4451 [2021-06-04 21:44:02,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=773, Invalid=2533, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-04 21:44:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-04 21:44:02,257 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) [2021-06-04 21:44:02,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-04 21:44:02,261 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-04 21:44:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:02,262 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-04 21:44:02,262 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) [2021-06-04 21:44:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-04 21:44:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:44:02,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:02,265 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] [2021-06-04 21:44:02,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:02,465 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-06-04 21:44:02,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:02,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188299161] [2021-06-04 21:44:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188299161] [2021-06-04 21:44:02,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188299161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496178422] [2021-06-04 21:44:02,616 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 [2021-06-04 21:44:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:44:02,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:02,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496178422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:02,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:02,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:44:02,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232848468] [2021-06-04 21:44:02,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:44:02,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:44:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:44:02,808 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:03,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:03,379 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-04 21:44:03,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:03,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:44:03,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:03,384 INFO L225 Difference]: With dead ends: 4791 [2021-06-04 21:44:03,384 INFO L226 Difference]: Without dead ends: 4521 [2021-06-04 21:44:03,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-04 21:44:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-04 21:44:03,439 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) [2021-06-04 21:44:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-04 21:44:03,444 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-04 21:44:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:03,444 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-04 21:44:03,444 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-04 21:44:03,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:44:03,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:03,447 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] [2021-06-04 21:44:03,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-04 21:44:03,648 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:03,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-06-04 21:44:03,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:03,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261871990] [2021-06-04 21:44:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:03,801 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:03,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261871990] [2021-06-04 21:44:03,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261871990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:03,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826284856] [2021-06-04 21:44:03,802 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 [2021-06-04 21:44:03,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:03,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:44:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:03,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826284856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:03,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:03,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:44:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604887559] [2021-06-04 21:44:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:03,994 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 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) [2021-06-04 21:44:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:04,787 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-04 21:44:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:44:04,787 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 [2021-06-04 21:44:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:04,792 INFO L225 Difference]: With dead ends: 5369 [2021-06-04 21:44:04,792 INFO L226 Difference]: Without dead ends: 4746 [2021-06-04 21:44:04,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:04,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-04 21:44:04,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-04 21:44:04,825 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) [2021-06-04 21:44:04,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-04 21:44:04,830 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-04 21:44:04,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:04,830 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-04 21:44:04,830 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) [2021-06-04 21:44:04,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-04 21:44:04,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:44:04,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:04,833 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] [2021-06-04 21:44:05,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:05,034 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-06-04 21:44:05,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:05,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262503529] [2021-06-04 21:44:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:05,178 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:05,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:05,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262503529] [2021-06-04 21:44:05,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262503529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:05,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021320474] [2021-06-04 21:44:05,179 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 [2021-06-04 21:44:05,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:05,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021320474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:05,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:05,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-04 21:44:05,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175736139] [2021-06-04 21:44:05,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-04 21:44:05,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-04 21:44:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-04 21:44:05,387 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:06,021 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-04 21:44:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:06,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:44:06,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:06,027 INFO L225 Difference]: With dead ends: 5598 [2021-06-04 21:44:06,027 INFO L226 Difference]: Without dead ends: 5328 [2021-06-04 21:44:06,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:06,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-04 21:44:06,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-04 21:44:06,067 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) [2021-06-04 21:44:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-04 21:44:06,072 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-04 21:44:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:06,072 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-04 21:44:06,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-04 21:44:06,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-04 21:44:06,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:06,075 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] [2021-06-04 21:44:06,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:06,281 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:06,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-06-04 21:44:06,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:06,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741990784] [2021-06-04 21:44:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:06,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:06,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741990784] [2021-06-04 21:44:06,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741990784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:06,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863224483] [2021-06-04 21:44:06,432 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 [2021-06-04 21:44:06,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-04 21:44:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:06,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863224483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:06,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:06,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-04 21:44:06,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119176172] [2021-06-04 21:44:06,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:06,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:06,621 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) [2021-06-04 21:44:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:07,436 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-04 21:44:07,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:07,436 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 [2021-06-04 21:44:07,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:07,440 INFO L225 Difference]: With dead ends: 5085 [2021-06-04 21:44:07,440 INFO L226 Difference]: Without dead ends: 4506 [2021-06-04 21:44:07,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 752.3ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-04 21:44:07,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-04 21:44:07,467 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) [2021-06-04 21:44:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-04 21:44:07,470 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-04 21:44:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:07,470 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-04 21:44:07,470 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) [2021-06-04 21:44:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-04 21:44:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:07,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:07,472 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] [2021-06-04 21:44:07,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:07,673 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-06-04 21:44:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:07,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067287282] [2021-06-04 21:44:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:07,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067287282] [2021-06-04 21:44:07,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067287282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:07,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701243214] [2021-06-04 21:44:07,875 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 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 [2021-06-04 21:44:07,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:07,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:07,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:07,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701243214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:08,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:08,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455128270] [2021-06-04 21:44:08,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:08,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:08,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:08,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:08,073 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) [2021-06-04 21:44:08,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:08,448 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-04 21:44:08,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:44:08,448 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 [2021-06-04 21:44:08,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:08,452 INFO L225 Difference]: With dead ends: 4031 [2021-06-04 21:44:08,452 INFO L226 Difference]: Without dead ends: 3761 [2021-06-04 21:44:08,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:44:08,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-04 21:44:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-04 21:44:08,478 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) [2021-06-04 21:44:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-04 21:44:08,481 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-04 21:44:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:08,481 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-04 21:44:08,481 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) [2021-06-04 21:44:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-04 21:44:08,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:08,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:08,483 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] [2021-06-04 21:44:08,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-04 21:44:08,684 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:08,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:08,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-06-04 21:44:08,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:08,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66760025] [2021-06-04 21:44:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:08,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66760025] [2021-06-04 21:44:08,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66760025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:08,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523983611] [2021-06-04 21:44:08,924 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 [2021-06-04 21:44:08,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:08,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:08,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:08,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:09,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523983611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:09,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:09,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:09,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489968762] [2021-06-04 21:44:09,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:09,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:09,139 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) [2021-06-04 21:44:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:09,560 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-04 21:44:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:09,561 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 [2021-06-04 21:44:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:09,564 INFO L225 Difference]: With dead ends: 4501 [2021-06-04 21:44:09,564 INFO L226 Difference]: Without dead ends: 4231 [2021-06-04 21:44:09,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:44:09,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-04 21:44:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-04 21:44:09,592 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) [2021-06-04 21:44:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-04 21:44:09,595 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-04 21:44:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:09,595 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-04 21:44:09,595 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) [2021-06-04 21:44:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-04 21:44:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:09,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:09,597 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] [2021-06-04 21:44:09,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:09,798 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-06-04 21:44:09,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:09,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391776651] [2021-06-04 21:44:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:09,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391776651] [2021-06-04 21:44:09,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391776651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:09,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778005543] [2021-06-04 21:44:09,989 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 [2021-06-04 21:44:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:10,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:10,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778005543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728150912] [2021-06-04 21:44:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:10,182 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) [2021-06-04 21:44:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:10,592 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-04 21:44:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:10,592 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 [2021-06-04 21:44:10,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:10,596 INFO L225 Difference]: With dead ends: 4531 [2021-06-04 21:44:10,596 INFO L226 Difference]: Without dead ends: 4261 [2021-06-04 21:44:10,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 450.3ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-04 21:44:10,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-04 21:44:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-04 21:44:10,622 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) [2021-06-04 21:44:10,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-04 21:44:10,626 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-04 21:44:10,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:10,626 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-04 21:44:10,626 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) [2021-06-04 21:44:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-04 21:44:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:10,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:10,628 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] [2021-06-04 21:44:10,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-04 21:44:10,828 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:10,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:10,829 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-06-04 21:44:10,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:10,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386777663] [2021-06-04 21:44:10,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:11,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:11,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386777663] [2021-06-04 21:44:11,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386777663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:11,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733789775] [2021-06-04 21:44:11,025 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 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 [2021-06-04 21:44:11,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:11,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:11,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:11,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:11,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733789775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:11,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:11,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:11,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294319469] [2021-06-04 21:44:11,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:11,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:11,234 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) [2021-06-04 21:44:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:11,716 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-04 21:44:11,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:11,717 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 [2021-06-04 21:44:11,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:11,720 INFO L225 Difference]: With dead ends: 4556 [2021-06-04 21:44:11,720 INFO L226 Difference]: Without dead ends: 4286 [2021-06-04 21:44:11,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-04 21:44:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-04 21:44:11,748 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) [2021-06-04 21:44:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-04 21:44:11,751 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-04 21:44:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:11,752 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-04 21:44:11,752 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) [2021-06-04 21:44:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-04 21:44:11,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:11,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:11,754 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] [2021-06-04 21:44:11,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-04 21:44:11,954 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:11,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:11,955 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-06-04 21:44:11,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:11,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169880215] [2021-06-04 21:44:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:12,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169880215] [2021-06-04 21:44:12,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169880215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:12,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87619932] [2021-06-04 21:44:12,135 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 [2021-06-04 21:44:12,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:12,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:12,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:44:12,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:12,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87619932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:12,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:12,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:12,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464795172] [2021-06-04 21:44:12,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:12,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:12,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:12,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:12,347 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) [2021-06-04 21:44:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:12,783 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-04 21:44:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:12,783 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 [2021-06-04 21:44:12,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:12,787 INFO L225 Difference]: With dead ends: 4581 [2021-06-04 21:44:12,787 INFO L226 Difference]: Without dead ends: 4311 [2021-06-04 21:44:12,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:12,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-04 21:44:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-04 21:44:12,816 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) [2021-06-04 21:44:12,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-04 21:44:12,820 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-04 21:44:12,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:12,820 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-04 21:44:12,820 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) [2021-06-04 21:44:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-04 21:44:12,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:12,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:12,822 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] [2021-06-04 21:44:13,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-04 21:44:13,022 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:13,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:13,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-06-04 21:44:13,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:13,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745287975] [2021-06-04 21:44:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:13,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:13,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745287975] [2021-06-04 21:44:13,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745287975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:13,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134015643] [2021-06-04 21:44:13,210 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 [2021-06-04 21:44:13,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:13,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:13,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:13,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:13,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134015643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:13,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:13,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:13,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495764119] [2021-06-04 21:44:13,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:13,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:13,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:13,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:13,423 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) [2021-06-04 21:44:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:13,999 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-04 21:44:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:13,999 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 [2021-06-04 21:44:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:14,003 INFO L225 Difference]: With dead ends: 4606 [2021-06-04 21:44:14,003 INFO L226 Difference]: Without dead ends: 4336 [2021-06-04 21:44:14,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 573.4ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-04 21:44:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-04 21:44:14,035 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) [2021-06-04 21:44:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-04 21:44:14,039 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-04 21:44:14,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:14,039 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-04 21:44:14,039 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) [2021-06-04 21:44:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-04 21:44:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:14,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:14,042 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] [2021-06-04 21:44:14,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-04 21:44:14,258 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-06-04 21:44:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:14,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505998216] [2021-06-04 21:44:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:14,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:14,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505998216] [2021-06-04 21:44:14,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505998216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:14,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964406753] [2021-06-04 21:44:14,433 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 [2021-06-04 21:44:14,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:14,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:14,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:14,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964406753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099462052] [2021-06-04 21:44:14,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:14,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:14,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:14,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:14,634 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) [2021-06-04 21:44:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:15,125 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-04 21:44:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:15,125 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 [2021-06-04 21:44:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:15,129 INFO L225 Difference]: With dead ends: 4631 [2021-06-04 21:44:15,130 INFO L226 Difference]: Without dead ends: 4361 [2021-06-04 21:44:15,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 489.1ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:44:15,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-04 21:44:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-04 21:44:15,166 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) [2021-06-04 21:44:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-04 21:44:15,170 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-04 21:44:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:15,170 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-04 21:44:15,170 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) [2021-06-04 21:44:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-04 21:44:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:15,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:15,172 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] [2021-06-04 21:44:15,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:15,373 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-06-04 21:44:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:15,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544624986] [2021-06-04 21:44:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:15,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544624986] [2021-06-04 21:44:15,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544624986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116770896] [2021-06-04 21:44:15,557 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 [2021-06-04 21:44:15,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:15,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:15,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:15,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116770896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:15,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:15,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:15,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015845129] [2021-06-04 21:44:15,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:15,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:15,808 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) [2021-06-04 21:44:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:16,432 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-04 21:44:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:16,432 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 [2021-06-04 21:44:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:16,436 INFO L225 Difference]: With dead ends: 4656 [2021-06-04 21:44:16,436 INFO L226 Difference]: Without dead ends: 4386 [2021-06-04 21:44:16,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 617.2ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-04 21:44:16,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-04 21:44:16,471 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) [2021-06-04 21:44:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-04 21:44:16,475 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-04 21:44:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:16,475 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-04 21:44:16,476 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) [2021-06-04 21:44:16,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-04 21:44:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:16,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:16,478 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] [2021-06-04 21:44:16,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-04 21:44:16,678 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-06-04 21:44:16,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:16,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157219029] [2021-06-04 21:44:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:16,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:16,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157219029] [2021-06-04 21:44:16,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157219029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:16,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033838059] [2021-06-04 21:44:16,851 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 [2021-06-04 21:44:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:16,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:17,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033838059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:17,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:17,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:17,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099365713] [2021-06-04 21:44:17,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:17,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:17,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:17,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:17,044 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) [2021-06-04 21:44:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:17,591 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-04 21:44:17,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:17,591 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 [2021-06-04 21:44:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:17,595 INFO L225 Difference]: With dead ends: 4681 [2021-06-04 21:44:17,595 INFO L226 Difference]: Without dead ends: 4411 [2021-06-04 21:44:17,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:44:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-04 21:44:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-04 21:44:17,628 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) [2021-06-04 21:44:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-04 21:44:17,632 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-04 21:44:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:17,633 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-04 21:44:17,633 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) [2021-06-04 21:44:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-04 21:44:17,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:17,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:17,635 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] [2021-06-04 21:44:17,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:17,836 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:17,836 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-06-04 21:44:17,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:17,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215138298] [2021-06-04 21:44:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:18,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:18,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215138298] [2021-06-04 21:44:18,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215138298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:18,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130065800] [2021-06-04 21:44:18,027 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 [2021-06-04 21:44:18,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:18,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:18,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130065800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:18,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:18,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:18,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954698506] [2021-06-04 21:44:18,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:18,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:18,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:18,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:18,231 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) [2021-06-04 21:44:18,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:18,877 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-04 21:44:18,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:44:18,877 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 [2021-06-04 21:44:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:18,882 INFO L225 Difference]: With dead ends: 4706 [2021-06-04 21:44:18,882 INFO L226 Difference]: Without dead ends: 4436 [2021-06-04 21:44:18,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-04 21:44:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-04 21:44:18,917 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) [2021-06-04 21:44:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-04 21:44:18,922 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-04 21:44:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:18,922 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-04 21:44:18,922 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) [2021-06-04 21:44:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-04 21:44:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:18,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:18,925 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] [2021-06-04 21:44:19,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:19,125 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-06-04 21:44:19,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:19,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920923921] [2021-06-04 21:44:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920923921] [2021-06-04 21:44:19,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920923921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183625491] [2021-06-04 21:44:19,312 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 [2021-06-04 21:44:19,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:19,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:44:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:19,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183625491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:19,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:19,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:19,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901871367] [2021-06-04 21:44:19,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:19,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:19,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:19,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:19,510 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) [2021-06-04 21:44:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:20,088 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-04 21:44:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:20,089 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 [2021-06-04 21:44:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:20,093 INFO L225 Difference]: With dead ends: 4731 [2021-06-04 21:44:20,093 INFO L226 Difference]: Without dead ends: 4461 [2021-06-04 21:44:20,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:44:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-04 21:44:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-04 21:44:20,133 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) [2021-06-04 21:44:20,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-04 21:44:20,137 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-04 21:44:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:20,137 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-04 21:44:20,137 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) [2021-06-04 21:44:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-04 21:44:20,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:20,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:20,140 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] [2021-06-04 21:44:20,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:20,341 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:20,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:20,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-06-04 21:44:20,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:20,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133463982] [2021-06-04 21:44:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:20,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133463982] [2021-06-04 21:44:20,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133463982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:20,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984002378] [2021-06-04 21:44:20,509 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 [2021-06-04 21:44:20,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:20,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:20,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:20,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:20,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984002378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:20,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:20,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318578356] [2021-06-04 21:44:20,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:20,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:20,711 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) [2021-06-04 21:44:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:21,401 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-04 21:44:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:21,401 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 [2021-06-04 21:44:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:21,406 INFO L225 Difference]: With dead ends: 4756 [2021-06-04 21:44:21,406 INFO L226 Difference]: Without dead ends: 4486 [2021-06-04 21:44:21,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-04 21:44:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-04 21:44:21,443 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) [2021-06-04 21:44:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-04 21:44:21,448 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-04 21:44:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:21,448 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-04 21:44:21,448 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) [2021-06-04 21:44:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-04 21:44:21,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:21,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:21,451 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] [2021-06-04 21:44:21,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:21,651 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-06-04 21:44:21,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:21,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900822589] [2021-06-04 21:44:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900822589] [2021-06-04 21:44:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900822589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316219299] [2021-06-04 21:44:21,824 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 [2021-06-04 21:44:21,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-04 21:44:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:22,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316219299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:22,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:22,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:22,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027942170] [2021-06-04 21:44:22,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:22,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:22,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:22,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:22,019 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) [2021-06-04 21:44:22,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:22,644 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-04 21:44:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:22,644 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 [2021-06-04 21:44:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:22,674 INFO L225 Difference]: With dead ends: 4781 [2021-06-04 21:44:22,674 INFO L226 Difference]: Without dead ends: 4511 [2021-06-04 21:44:22,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:44:22,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-04 21:44:22,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-04 21:44:22,709 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) [2021-06-04 21:44:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-04 21:44:22,713 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-04 21:44:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:22,713 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-04 21:44:22,714 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) [2021-06-04 21:44:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-04 21:44:22,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:22,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:22,717 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] [2021-06-04 21:44:22,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-04 21:44:22,917 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-06-04 21:44:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:22,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805719449] [2021-06-04 21:44:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:23,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:23,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805719449] [2021-06-04 21:44:23,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805719449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:23,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735498606] [2021-06-04 21:44:23,087 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 [2021-06-04 21:44:23,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-04 21:44:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:23,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:44:23,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:23,293 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:23,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735498606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:23,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:23,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:23,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099795033] [2021-06-04 21:44:23,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:23,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:23,294 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) [2021-06-04 21:44:24,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:24,019 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-04 21:44:24,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:24,019 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 [2021-06-04 21:44:24,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:24,023 INFO L225 Difference]: With dead ends: 4806 [2021-06-04 21:44:24,023 INFO L226 Difference]: Without dead ends: 4536 [2021-06-04 21:44:24,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 684.9ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-04 21:44:24,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-04 21:44:24,061 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) [2021-06-04 21:44:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-04 21:44:24,065 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-04 21:44:24,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:24,066 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-04 21:44:24,066 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) [2021-06-04 21:44:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-04 21:44:24,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:24,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:24,069 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] [2021-06-04 21:44:24,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-04 21:44:24,283 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:24,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-06-04 21:44:24,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:24,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368330328] [2021-06-04 21:44:24,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368330328] [2021-06-04 21:44:24,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368330328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95733285] [2021-06-04 21:44:24,437 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 [2021-06-04 21:44:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:24,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95733285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:24,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:24,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:24,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403074061] [2021-06-04 21:44:24,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:24,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:24,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:24,658 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) [2021-06-04 21:44:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:25,282 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-04 21:44:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:25,282 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 [2021-06-04 21:44:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:25,287 INFO L225 Difference]: With dead ends: 4831 [2021-06-04 21:44:25,287 INFO L226 Difference]: Without dead ends: 4561 [2021-06-04 21:44:25,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:44:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-04 21:44:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-04 21:44:25,332 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) [2021-06-04 21:44:25,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-04 21:44:25,338 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-04 21:44:25,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:25,338 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-04 21:44:25,338 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) [2021-06-04 21:44:25,338 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-04 21:44:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:25,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:25,341 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] [2021-06-04 21:44:25,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-04 21:44:25,541 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:25,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-06-04 21:44:25,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:25,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680580860] [2021-06-04 21:44:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:25,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680580860] [2021-06-04 21:44:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680580860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485453167] [2021-06-04 21:44:25,710 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 [2021-06-04 21:44:25,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:25,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:25,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:25,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485453167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:25,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:25,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705102072] [2021-06-04 21:44:25,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:25,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:25,919 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) [2021-06-04 21:44:26,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:26,767 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-04 21:44:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:44:26,767 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 [2021-06-04 21:44:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:26,772 INFO L225 Difference]: With dead ends: 4916 [2021-06-04 21:44:26,772 INFO L226 Difference]: Without dead ends: 4646 [2021-06-04 21:44:26,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 791.5ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-04 21:44:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-04 21:44:26,815 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) [2021-06-04 21:44:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-04 21:44:26,821 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-04 21:44:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:26,821 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-04 21:44:26,821 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) [2021-06-04 21:44:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-04 21:44:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:26,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:26,824 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] [2021-06-04 21:44:27,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:27,028 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-06-04 21:44:27,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:27,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216347094] [2021-06-04 21:44:27,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:27,191 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:27,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:27,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216347094] [2021-06-04 21:44:27,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216347094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:27,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904549232] [2021-06-04 21:44:27,192 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 [2021-06-04 21:44:27,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-04 21:44:27,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:27,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:27,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904549232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:27,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:27,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-04 21:44:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443577187] [2021-06-04 21:44:27,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-04 21:44:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-04 21:44:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-04 21:44:27,383 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) [2021-06-04 21:44:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:28,059 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-04 21:44:28,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:28,060 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 [2021-06-04 21:44:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:28,064 INFO L225 Difference]: With dead ends: 5658 [2021-06-04 21:44:28,065 INFO L226 Difference]: Without dead ends: 5388 [2021-06-04 21:44:28,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:44:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-04 21:44:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-04 21:44:28,106 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) [2021-06-04 21:44:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-04 21:44:28,112 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-04 21:44:28,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:28,112 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-04 21:44:28,112 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) [2021-06-04 21:44:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-04 21:44:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-04 21:44:28,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:28,116 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] [2021-06-04 21:44:28,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:28,324 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-06-04 21:44:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:28,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860333565] [2021-06-04 21:44:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860333565] [2021-06-04 21:44:28,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860333565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977436119] [2021-06-04 21:44:28,497 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 [2021-06-04 21:44:28,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:28,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-04 21:44:28,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:28,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977436119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:28,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:28,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-04 21:44:28,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41520289] [2021-06-04 21:44:28,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:28,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:28,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:28,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:28,695 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) [2021-06-04 21:44:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:29,501 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-04 21:44:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:29,501 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 [2021-06-04 21:44:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:29,506 INFO L225 Difference]: With dead ends: 5120 [2021-06-04 21:44:29,507 INFO L226 Difference]: Without dead ends: 4631 [2021-06-04 21:44:29,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 767.7ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:44:29,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-04 21:44:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-04 21:44:29,536 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) [2021-06-04 21:44:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-04 21:44:29,539 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-04 21:44:29,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:29,540 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-04 21:44:29,540 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) [2021-06-04 21:44:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-04 21:44:29,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:29,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:29,542 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] [2021-06-04 21:44:29,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:29,742 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:29,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:29,742 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-06-04 21:44:29,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:29,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030631510] [2021-06-04 21:44:29,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:29,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:29,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030631510] [2021-06-04 21:44:29,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030631510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:29,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98324420] [2021-06-04 21:44:29,986 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 [2021-06-04 21:44:30,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:30,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:30,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:30,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:30,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98324420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:30,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:30,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:44:30,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606084723] [2021-06-04 21:44:30,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:44:30,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:44:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:44:30,221 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) [2021-06-04 21:44:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:30,688 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-04 21:44:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:30,688 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 [2021-06-04 21:44:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:30,691 INFO L225 Difference]: With dead ends: 3774 [2021-06-04 21:44:30,691 INFO L226 Difference]: Without dead ends: 3440 [2021-06-04 21:44:30,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 528.0ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:30,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-04 21:44:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-04 21:44:30,712 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) [2021-06-04 21:44:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-04 21:44:30,715 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-04 21:44:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:30,715 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-04 21:44:30,715 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) [2021-06-04 21:44:30,715 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-04 21:44:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:30,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:30,717 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] [2021-06-04 21:44:30,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:30,917 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2008975183, now seen corresponding path program 186 times [2021-06-04 21:44:30,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:30,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943332380] [2021-06-04 21:44:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:31,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:31,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943332380] [2021-06-04 21:44:31,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943332380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:31,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647142142] [2021-06-04 21:44:31,136 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 [2021-06-04 21:44:31,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:31,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:31,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:31,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:31,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647142142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:31,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:31,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:31,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107319785] [2021-06-04 21:44:31,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:31,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:31,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:31,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:31,370 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) [2021-06-04 21:44:31,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:31,766 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-04 21:44:31,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-04 21:44:31,767 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 [2021-06-04 21:44:31,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:31,771 INFO L225 Difference]: With dead ends: 4696 [2021-06-04 21:44:31,771 INFO L226 Difference]: Without dead ends: 4426 [2021-06-04 21:44:31,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-04 21:44:31,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-04 21:44:31,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-04 21:44:31,809 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) [2021-06-04 21:44:31,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-04 21:44:31,813 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-04 21:44:31,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:31,814 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-04 21:44:31,814 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) [2021-06-04 21:44:31,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-04 21:44:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:31,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:31,816 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] [2021-06-04 21:44:32,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-04 21:44:32,017 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash -644426879, now seen corresponding path program 187 times [2021-06-04 21:44:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898354238] [2021-06-04 21:44:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:32,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898354238] [2021-06-04 21:44:32,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898354238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452732507] [2021-06-04 21:44:32,275 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 [2021-06-04 21:44:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:32,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452732507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:32,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:32,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:32,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371804033] [2021-06-04 21:44:32,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:32,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:32,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:32,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:32,496 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) [2021-06-04 21:44:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:32,948 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-04 21:44:32,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:32,948 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 [2021-06-04 21:44:32,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:32,952 INFO L225 Difference]: With dead ends: 4656 [2021-06-04 21:44:32,952 INFO L226 Difference]: Without dead ends: 4386 [2021-06-04 21:44:32,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:32,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-04 21:44:32,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-04 21:44:32,980 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) [2021-06-04 21:44:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-04 21:44:32,983 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-04 21:44:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:32,983 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-04 21:44:32,983 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) [2021-06-04 21:44:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-04 21:44:32,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:32,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:32,985 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] [2021-06-04 21:44:33,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:33,186 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:33,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1373308399, now seen corresponding path program 188 times [2021-06-04 21:44:33,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:33,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610547582] [2021-06-04 21:44:33,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:33,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:33,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:33,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610547582] [2021-06-04 21:44:33,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610547582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:33,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326788997] [2021-06-04 21:44:33,437 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 [2021-06-04 21:44:33,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:33,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:33,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:33,655 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:33,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326788997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:33,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:33,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:33,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394975473] [2021-06-04 21:44:33,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:33,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:33,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:33,656 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) [2021-06-04 21:44:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:34,060 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-04 21:44:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-04 21:44:34,061 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 [2021-06-04 21:44:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:34,065 INFO L225 Difference]: With dead ends: 4706 [2021-06-04 21:44:34,065 INFO L226 Difference]: Without dead ends: 4436 [2021-06-04 21:44:34,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-04 21:44:34,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-04 21:44:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-04 21:44:34,098 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) [2021-06-04 21:44:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-04 21:44:34,101 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-04 21:44:34,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:34,101 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-04 21:44:34,101 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) [2021-06-04 21:44:34,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-04 21:44:34,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:34,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:34,103 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] [2021-06-04 21:44:34,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:34,304 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:34,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:34,304 INFO L82 PathProgramCache]: Analyzing trace with hash 474784959, now seen corresponding path program 189 times [2021-06-04 21:44:34,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:34,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146537763] [2021-06-04 21:44:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:34,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146537763] [2021-06-04 21:44:34,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146537763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:34,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786305227] [2021-06-04 21:44:34,527 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 [2021-06-04 21:44:34,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:34,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:34,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786305227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:34,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:34,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:34,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136021517] [2021-06-04 21:44:34,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:34,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:34,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:34,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:34,752 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) [2021-06-04 21:44:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:35,252 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-04 21:44:35,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:35,252 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 [2021-06-04 21:44:35,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:35,257 INFO L225 Difference]: With dead ends: 4731 [2021-06-04 21:44:35,257 INFO L226 Difference]: Without dead ends: 4461 [2021-06-04 21:44:35,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 561.8ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:35,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-04 21:44:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-04 21:44:35,289 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) [2021-06-04 21:44:35,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-04 21:44:35,293 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-04 21:44:35,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:35,293 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-04 21:44:35,293 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) [2021-06-04 21:44:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-04 21:44:35,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:35,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:35,295 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] [2021-06-04 21:44:35,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:35,496 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:35,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1140168531, now seen corresponding path program 190 times [2021-06-04 21:44:35,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:35,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113343208] [2021-06-04 21:44:35,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:35,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113343208] [2021-06-04 21:44:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113343208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:35,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993639202] [2021-06-04 21:44:35,707 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 [2021-06-04 21:44:35,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:35,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:35,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:35,945 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:35,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993639202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:35,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:35,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:35,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193516267] [2021-06-04 21:44:35,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:35,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:35,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:35,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:35,946 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) [2021-06-04 21:44:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:36,403 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-04 21:44:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:44:36,403 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 [2021-06-04 21:44:36,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:36,408 INFO L225 Difference]: With dead ends: 4756 [2021-06-04 21:44:36,408 INFO L226 Difference]: Without dead ends: 4486 [2021-06-04 21:44:36,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-04 21:44:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-04 21:44:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-04 21:44:36,439 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) [2021-06-04 21:44:36,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-04 21:44:36,442 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-04 21:44:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:36,442 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-04 21:44:36,443 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) [2021-06-04 21:44:36,443 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-04 21:44:36,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:36,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:36,445 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] [2021-06-04 21:44:36,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:36,645 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1520612483, now seen corresponding path program 191 times [2021-06-04 21:44:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:36,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826943817] [2021-06-04 21:44:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:36,875 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:36,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:36,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826943817] [2021-06-04 21:44:36,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826943817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:36,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873039274] [2021-06-04 21:44:36,876 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 [2021-06-04 21:44:36,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:36,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:36,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:36,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:37,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873039274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:37,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:37,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:37,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651970494] [2021-06-04 21:44:37,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:37,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:37,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:37,106 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) [2021-06-04 21:44:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:37,672 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-04 21:44:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:44:37,673 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 [2021-06-04 21:44:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:37,677 INFO L225 Difference]: With dead ends: 4781 [2021-06-04 21:44:37,677 INFO L226 Difference]: Without dead ends: 4511 [2021-06-04 21:44:37,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-04 21:44:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-04 21:44:37,710 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) [2021-06-04 21:44:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-04 21:44:37,714 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-04 21:44:37,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:37,714 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-04 21:44:37,714 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) [2021-06-04 21:44:37,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-04 21:44:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:37,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:37,716 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] [2021-06-04 21:44:37,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-04 21:44:37,917 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:37,917 INFO L82 PathProgramCache]: Analyzing trace with hash -896237333, now seen corresponding path program 192 times [2021-06-04 21:44:37,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:37,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560338339] [2021-06-04 21:44:37,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:38,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:38,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560338339] [2021-06-04 21:44:38,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560338339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:38,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725829511] [2021-06-04 21:44:38,128 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 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 [2021-06-04 21:44:38,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:38,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:38,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:38,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725829511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:38,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:38,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:38,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810298732] [2021-06-04 21:44:38,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:38,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:38,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:38,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:38,339 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) [2021-06-04 21:44:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:38,835 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-04 21:44:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:44:38,835 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 [2021-06-04 21:44:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:38,839 INFO L225 Difference]: With dead ends: 4806 [2021-06-04 21:44:38,839 INFO L226 Difference]: Without dead ends: 4536 [2021-06-04 21:44:38,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 523.5ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-04 21:44:38,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-04 21:44:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-04 21:44:38,871 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) [2021-06-04 21:44:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-04 21:44:38,875 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-04 21:44:38,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:38,875 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-04 21:44:38,875 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) [2021-06-04 21:44:38,875 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-04 21:44:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:38,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:38,877 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] [2021-06-04 21:44:39,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-04 21:44:39,078 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:39,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:39,078 INFO L82 PathProgramCache]: Analyzing trace with hash -87185477, now seen corresponding path program 193 times [2021-06-04 21:44:39,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:39,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146421907] [2021-06-04 21:44:39,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:39,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146421907] [2021-06-04 21:44:39,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146421907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:39,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147273336] [2021-06-04 21:44:39,276 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 [2021-06-04 21:44:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:39,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147273336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658062231] [2021-06-04 21:44:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:39,491 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) [2021-06-04 21:44:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:40,115 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-04 21:44:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:40,115 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 [2021-06-04 21:44:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:40,119 INFO L225 Difference]: With dead ends: 4831 [2021-06-04 21:44:40,119 INFO L226 Difference]: Without dead ends: 4561 [2021-06-04 21:44:40,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-04 21:44:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-04 21:44:40,149 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) [2021-06-04 21:44:40,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-04 21:44:40,153 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-04 21:44:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:40,153 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-04 21:44:40,153 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) [2021-06-04 21:44:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-04 21:44:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:40,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:40,155 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] [2021-06-04 21:44:40,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-04 21:44:40,356 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:40,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:40,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1479135575, now seen corresponding path program 194 times [2021-06-04 21:44:40,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:40,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280753630] [2021-06-04 21:44:40,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:40,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:40,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280753630] [2021-06-04 21:44:40,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280753630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:40,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129927274] [2021-06-04 21:44:40,551 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 [2021-06-04 21:44:40,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:40,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:40,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129927274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:40,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:40,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:40,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954634130] [2021-06-04 21:44:40,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:40,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:40,757 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) [2021-06-04 21:44:41,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:41,295 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-04 21:44:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:44:41,295 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 [2021-06-04 21:44:41,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:41,300 INFO L225 Difference]: With dead ends: 4856 [2021-06-04 21:44:41,300 INFO L226 Difference]: Without dead ends: 4586 [2021-06-04 21:44:41,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-04 21:44:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-04 21:44:41,333 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) [2021-06-04 21:44:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-04 21:44:41,337 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-04 21:44:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:41,337 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-04 21:44:41,337 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) [2021-06-04 21:44:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-04 21:44:41,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:41,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:41,340 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] [2021-06-04 21:44:41,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-04 21:44:41,541 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1724212871, now seen corresponding path program 195 times [2021-06-04 21:44:41,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:41,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976940010] [2021-06-04 21:44:41,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:41,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:41,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976940010] [2021-06-04 21:44:41,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976940010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:41,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058889937] [2021-06-04 21:44:41,732 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 [2021-06-04 21:44:41,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:44:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058889937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:41,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:41,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644750623] [2021-06-04 21:44:41,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:41,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:41,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:41,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:41,956 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) [2021-06-04 21:44:42,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:42,611 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-04 21:44:42,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:44:42,611 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 [2021-06-04 21:44:42,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:42,616 INFO L225 Difference]: With dead ends: 4881 [2021-06-04 21:44:42,616 INFO L226 Difference]: Without dead ends: 4611 [2021-06-04 21:44:42,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=734, Invalid=2572, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-04 21:44:42,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-04 21:44:42,650 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) [2021-06-04 21:44:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-04 21:44:42,654 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-04 21:44:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:42,654 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-04 21:44:42,654 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) [2021-06-04 21:44:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-04 21:44:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:42,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:42,657 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] [2021-06-04 21:44:42,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:42,858 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:42,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:42,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2101063193, now seen corresponding path program 196 times [2021-06-04 21:44:42,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:42,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890919948] [2021-06-04 21:44:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:43,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890919948] [2021-06-04 21:44:43,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890919948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781758497] [2021-06-04 21:44:43,041 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 [2021-06-04 21:44:43,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:43,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:43,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:43,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781758497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:43,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:43,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:43,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297292921] [2021-06-04 21:44:43,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:43,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:43,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:43,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:43,235 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) [2021-06-04 21:44:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:43,806 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-04 21:44:43,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:44:43,807 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 [2021-06-04 21:44:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:43,811 INFO L225 Difference]: With dead ends: 4906 [2021-06-04 21:44:43,811 INFO L226 Difference]: Without dead ends: 4636 [2021-06-04 21:44:43,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:44:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-04 21:44:43,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-04 21:44:43,845 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) [2021-06-04 21:44:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-04 21:44:43,849 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-04 21:44:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:43,849 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-04 21:44:43,849 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) [2021-06-04 21:44:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-04 21:44:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:43,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:43,852 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] [2021-06-04 21:44:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-04 21:44:44,053 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -774307657, now seen corresponding path program 197 times [2021-06-04 21:44:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:44,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187676050] [2021-06-04 21:44:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:44,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187676050] [2021-06-04 21:44:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187676050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:44,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574105503] [2021-06-04 21:44:44,256 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 [2021-06-04 21:44:44,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:44,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:44,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:44,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574105503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:44,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:44,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:44,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549399418] [2021-06-04 21:44:44,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:44,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:44,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:44,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:44,466 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) [2021-06-04 21:44:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:45,176 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-04 21:44:45,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:44:45,176 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 [2021-06-04 21:44:45,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:45,181 INFO L225 Difference]: With dead ends: 4931 [2021-06-04 21:44:45,181 INFO L226 Difference]: Without dead ends: 4661 [2021-06-04 21:44:45,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:44:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-04 21:44:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-04 21:44:45,216 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) [2021-06-04 21:44:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-04 21:44:45,220 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-04 21:44:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:45,220 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-04 21:44:45,220 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) [2021-06-04 21:44:45,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-04 21:44:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:45,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:45,223 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] [2021-06-04 21:44:45,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:45,424 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -320091483, now seen corresponding path program 198 times [2021-06-04 21:44:45,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:45,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193523405] [2021-06-04 21:44:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:45,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:45,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193523405] [2021-06-04 21:44:45,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193523405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:45,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318618148] [2021-06-04 21:44:45,605 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 [2021-06-04 21:44:45,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:45,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:45,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:45,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:45,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318618148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:45,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:45,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:45,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877126657] [2021-06-04 21:44:45,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:45,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:45,812 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) [2021-06-04 21:44:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:46,421 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-04 21:44:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:44:46,422 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 [2021-06-04 21:44:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:46,427 INFO L225 Difference]: With dead ends: 4956 [2021-06-04 21:44:46,427 INFO L226 Difference]: Without dead ends: 4686 [2021-06-04 21:44:46,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 600.3ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:44:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-04 21:44:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-04 21:44:46,464 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) [2021-06-04 21:44:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-04 21:44:46,469 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-04 21:44:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:46,469 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-04 21:44:46,469 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) [2021-06-04 21:44:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-04 21:44:46,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:46,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:46,472 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] [2021-06-04 21:44:46,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-04 21:44:46,673 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:46,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:46,673 INFO L82 PathProgramCache]: Analyzing trace with hash 678804853, now seen corresponding path program 199 times [2021-06-04 21:44:46,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:46,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026019805] [2021-06-04 21:44:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:46,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:46,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026019805] [2021-06-04 21:44:46,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026019805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:46,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131897514] [2021-06-04 21:44:46,858 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 [2021-06-04 21:44:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:46,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:47,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131897514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:47,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:47,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:47,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121044927] [2021-06-04 21:44:47,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:47,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:47,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:47,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:47,078 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) [2021-06-04 21:44:47,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:47,850 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-04 21:44:47,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:47,851 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 [2021-06-04 21:44:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:47,855 INFO L225 Difference]: With dead ends: 4981 [2021-06-04 21:44:47,855 INFO L226 Difference]: Without dead ends: 4711 [2021-06-04 21:44:47,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 743.8ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-04 21:44:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-04 21:44:47,892 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) [2021-06-04 21:44:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-04 21:44:47,897 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-04 21:44:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:47,897 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-04 21:44:47,897 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) [2021-06-04 21:44:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-04 21:44:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:47,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:47,900 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] [2021-06-04 21:44:48,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:48,100 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:48,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:48,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1200523037, now seen corresponding path program 200 times [2021-06-04 21:44:48,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:48,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069797505] [2021-06-04 21:44:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069797505] [2021-06-04 21:44:48,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069797505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575313010] [2021-06-04 21:44:48,263 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 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 [2021-06-04 21:44:48,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:48,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:48,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:48,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:48,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575313010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:48,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:48,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:48,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454302788] [2021-06-04 21:44:48,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:48,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:48,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:48,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:48,505 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) [2021-06-04 21:44:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:49,177 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-04 21:44:49,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:44:49,177 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 [2021-06-04 21:44:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:49,182 INFO L225 Difference]: With dead ends: 5006 [2021-06-04 21:44:49,182 INFO L226 Difference]: Without dead ends: 4736 [2021-06-04 21:44:49,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:44:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-04 21:44:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-04 21:44:49,219 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) [2021-06-04 21:44:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-04 21:44:49,223 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-04 21:44:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:49,223 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-04 21:44:49,223 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) [2021-06-04 21:44:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-04 21:44:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:49,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:49,226 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] [2021-06-04 21:44:49,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:49,427 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:49,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:49,427 INFO L82 PathProgramCache]: Analyzing trace with hash 829796275, now seen corresponding path program 201 times [2021-06-04 21:44:49,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:49,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355063462] [2021-06-04 21:44:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:49,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355063462] [2021-06-04 21:44:49,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355063462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:49,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670688356] [2021-06-04 21:44:49,609 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 [2021-06-04 21:44:49,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:49,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:49,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:44:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:49,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670688356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:49,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:49,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:49,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127969763] [2021-06-04 21:44:49,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:49,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:49,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:49,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:49,824 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) [2021-06-04 21:44:50,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:50,624 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-04 21:44:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:44:50,625 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 [2021-06-04 21:44:50,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:50,629 INFO L225 Difference]: With dead ends: 5031 [2021-06-04 21:44:50,629 INFO L226 Difference]: Without dead ends: 4761 [2021-06-04 21:44:50,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=950, Invalid=3082, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-04 21:44:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-04 21:44:50,666 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) [2021-06-04 21:44:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-04 21:44:50,670 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-04 21:44:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:50,670 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-04 21:44:50,670 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) [2021-06-04 21:44:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-04 21:44:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:50,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:50,673 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] [2021-06-04 21:44:50,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:50,874 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1444035745, now seen corresponding path program 202 times [2021-06-04 21:44:50,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:50,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445807349] [2021-06-04 21:44:50,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:51,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445807349] [2021-06-04 21:44:51,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445807349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:51,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769599853] [2021-06-04 21:44:51,054 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 [2021-06-04 21:44:51,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:51,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:51,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:51,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769599853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:51,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:51,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491035168] [2021-06-04 21:44:51,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:51,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:51,245 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) [2021-06-04 21:44:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:51,966 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-04 21:44:51,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:44:51,967 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 [2021-06-04 21:44:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:51,972 INFO L225 Difference]: With dead ends: 5056 [2021-06-04 21:44:51,972 INFO L226 Difference]: Without dead ends: 4786 [2021-06-04 21:44:51,972 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:44:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-04 21:44:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-04 21:44:52,010 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) [2021-06-04 21:44:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-04 21:44:52,015 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-04 21:44:52,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:52,015 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-04 21:44:52,015 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) [2021-06-04 21:44:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-04 21:44:52,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:52,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:52,018 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] [2021-06-04 21:44:52,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-04 21:44:52,219 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash -271206543, now seen corresponding path program 203 times [2021-06-04 21:44:52,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:52,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022616629] [2021-06-04 21:44:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022616629] [2021-06-04 21:44:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022616629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552987082] [2021-06-04 21:44:52,418 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 [2021-06-04 21:44:52,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:44:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552987082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:52,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:52,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:52,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992335293] [2021-06-04 21:44:52,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:52,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:52,644 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) [2021-06-04 21:44:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:53,525 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-04 21:44:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:44:53,526 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 [2021-06-04 21:44:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:53,531 INFO L225 Difference]: With dead ends: 5141 [2021-06-04 21:44:53,531 INFO L226 Difference]: Without dead ends: 4871 [2021-06-04 21:44:53,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 827.7ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:44:53,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-04 21:44:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-04 21:44:53,570 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) [2021-06-04 21:44:53,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-04 21:44:53,575 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-04 21:44:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:53,575 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-04 21:44:53,575 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) [2021-06-04 21:44:53,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-04 21:44:53,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:53,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:53,578 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] [2021-06-04 21:44:53,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-04 21:44:53,779 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:53,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:53,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1303854145, now seen corresponding path program 204 times [2021-06-04 21:44:53,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:53,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562656698] [2021-06-04 21:44:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:53,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:53,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:53,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562656698] [2021-06-04 21:44:53,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562656698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:53,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221972143] [2021-06-04 21:44:53,953 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 [2021-06-04 21:44:54,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:44:54,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:54,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:54,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:54,158 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:54,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221972143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:54,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:54,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-04 21:44:54,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186231123] [2021-06-04 21:44:54,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-04 21:44:54,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:54,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-04 21:44:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-04 21:44:54,159 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) [2021-06-04 21:44:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:54,921 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-04 21:44:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:44:54,922 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 [2021-06-04 21:44:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:54,927 INFO L225 Difference]: With dead ends: 5908 [2021-06-04 21:44:54,927 INFO L226 Difference]: Without dead ends: 5638 [2021-06-04 21:44:54,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:44:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-04 21:44:54,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-04 21:44:54,966 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) [2021-06-04 21:44:54,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-04 21:44:54,972 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-04 21:44:54,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:54,972 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-04 21:44:54,972 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) [2021-06-04 21:44:54,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-04 21:44:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-04 21:44:54,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:54,975 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] [2021-06-04 21:44:55,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-04 21:44:55,176 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1281510895, now seen corresponding path program 205 times [2021-06-04 21:44:55,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:55,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872313045] [2021-06-04 21:44:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:55,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:55,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872313045] [2021-06-04 21:44:55,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872313045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:55,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127408906] [2021-06-04 21:44:55,352 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 [2021-06-04 21:44:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:55,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-04 21:44:55,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:55,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127408906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:55,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:55,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-04 21:44:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044632860] [2021-06-04 21:44:55,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-04 21:44:55,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-04 21:44:55,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-04 21:44:55,555 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 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) [2021-06-04 21:44:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:56,566 INFO L93 Difference]: Finished difference Result 5395 states and 14681 transitions. [2021-06-04 21:44:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:44:56,566 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 [2021-06-04 21:44:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:56,572 INFO L225 Difference]: With dead ends: 5395 [2021-06-04 21:44:56,572 INFO L226 Difference]: Without dead ends: 4906 [2021-06-04 21:44:56,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1247 ImplicationChecksByTransitivity, 883.0ms TimeCoverageRelationStatistics Valid=1379, Invalid=3451, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:44:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4906 states. [2021-06-04 21:44:56,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4906 to 2913. [2021-06-04 21:44:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.739697802197802) internal successors, (7978), 2912 states have internal predecessors, (7978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 7978 transitions. [2021-06-04 21:44:56,627 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 7978 transitions. Word has length 130 [2021-06-04 21:44:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:56,627 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 7978 transitions. [2021-06-04 21:44:56,627 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) [2021-06-04 21:44:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 7978 transitions. [2021-06-04 21:44:56,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:56,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:56,629 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] [2021-06-04 21:44:56,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-04 21:44:56,830 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:56,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:56,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1365615058, now seen corresponding path program 206 times [2021-06-04 21:44:56,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:56,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32616367] [2021-06-04 21:44:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:57,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:57,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32616367] [2021-06-04 21:44:57,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32616367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:57,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578558349] [2021-06-04 21:44:57,062 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 [2021-06-04 21:44:57,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:44:57,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:57,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:57,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:57,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578558349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:57,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:57,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:57,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315604302] [2021-06-04 21:44:57,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:57,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:57,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:57,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:57,289 INFO L87 Difference]: Start difference. First operand 2913 states and 7978 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) [2021-06-04 21:44:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:57,787 INFO L93 Difference]: Finished difference Result 4331 states and 11017 transitions. [2021-06-04 21:44:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:44:57,787 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 [2021-06-04 21:44:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:57,791 INFO L225 Difference]: With dead ends: 4331 [2021-06-04 21:44:57,791 INFO L226 Difference]: Without dead ends: 4061 [2021-06-04 21:44:57,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 537.4ms TimeCoverageRelationStatistics Valid=722, Invalid=2034, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:44:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-04 21:44:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2988. [2021-06-04 21:44:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7462336792768665) internal successors, (8203), 2987 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:57,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8203 transitions. [2021-06-04 21:44:57,821 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8203 transitions. Word has length 135 [2021-06-04 21:44:57,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:57,821 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8203 transitions. [2021-06-04 21:44:57,821 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) [2021-06-04 21:44:57,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8203 transitions. [2021-06-04 21:44:57,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:57,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:57,823 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] [2021-06-04 21:44:58,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-04 21:44:58,037 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:58,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1066754, now seen corresponding path program 207 times [2021-06-04 21:44:58,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:58,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577371598] [2021-06-04 21:44:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:58,304 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:58,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577371598] [2021-06-04 21:44:58,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577371598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:58,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764994035] [2021-06-04 21:44:58,304 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 [2021-06-04 21:44:58,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:44:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:58,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:58,561 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:58,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764994035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:58,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:58,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:44:58,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220615269] [2021-06-04 21:44:58,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:44:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:44:58,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:44:58,562 INFO L87 Difference]: Start difference. First operand 2988 states and 8203 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:44:59,046 INFO L93 Difference]: Finished difference Result 4851 states and 12132 transitions. [2021-06-04 21:44:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:44:59,046 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:44:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:44:59,050 INFO L225 Difference]: With dead ends: 4851 [2021-06-04 21:44:59,050 INFO L226 Difference]: Without dead ends: 4581 [2021-06-04 21:44:59,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 576.8ms TimeCoverageRelationStatistics Valid=780, Invalid=2300, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:44:59,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-06-04 21:44:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 3063. [2021-06-04 21:44:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.752449379490529) internal successors, (8428), 3062 states have internal predecessors, (8428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8428 transitions. [2021-06-04 21:44:59,080 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8428 transitions. Word has length 135 [2021-06-04 21:44:59,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:44:59,080 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8428 transitions. [2021-06-04 21:44:59,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:44:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8428 transitions. [2021-06-04 21:44:59,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:44:59,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:44:59,083 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] [2021-06-04 21:44:59,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:44:59,283 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:44:59,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:44:59,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2016668524, now seen corresponding path program 208 times [2021-06-04 21:44:59,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:44:59,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716729089] [2021-06-04 21:44:59,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:44:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:44:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:59,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:44:59,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716729089] [2021-06-04 21:44:59,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716729089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:59,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631938806] [2021-06-04 21:44:59,500 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 [2021-06-04 21:44:59,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:44:59,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:44:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:44:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:44:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:44:59,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631938806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:44:59,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:44:59,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:44:59,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418282259] [2021-06-04 21:44:59,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:44:59,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:44:59,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:44:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:44:59,735 INFO L87 Difference]: Start difference. First operand 3063 states and 8428 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) [2021-06-04 21:45:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:00,228 INFO L93 Difference]: Finished difference Result 4881 states and 12267 transitions. [2021-06-04 21:45:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:45:00,228 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 [2021-06-04 21:45:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:00,233 INFO L225 Difference]: With dead ends: 4881 [2021-06-04 21:45:00,233 INFO L226 Difference]: Without dead ends: 4611 [2021-06-04 21:45:00,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=776, Invalid=2304, Unknown=0, NotChecked=0, Total=3080 [2021-06-04 21:45:00,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-04 21:45:00,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3138. [2021-06-04 21:45:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.7583678673892256) internal successors, (8653), 3137 states have internal predecessors, (8653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:00,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8653 transitions. [2021-06-04 21:45:00,265 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8653 transitions. Word has length 135 [2021-06-04 21:45:00,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:00,265 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8653 transitions. [2021-06-04 21:45:00,265 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) [2021-06-04 21:45:00,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8653 transitions. [2021-06-04 21:45:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:00,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:00,267 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] [2021-06-04 21:45:00,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-04 21:45:00,467 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1118145084, now seen corresponding path program 209 times [2021-06-04 21:45:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:00,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969653133] [2021-06-04 21:45:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:00,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969653133] [2021-06-04 21:45:00,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969653133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:00,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918617606] [2021-06-04 21:45:00,696 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 [2021-06-04 21:45:00,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:00,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:00,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:00,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:00,950 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:00,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918617606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:00,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:00,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:00,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511861442] [2021-06-04 21:45:00,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:00,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:00,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:00,951 INFO L87 Difference]: Start difference. First operand 3138 states and 8653 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:01,554 INFO L93 Difference]: Finished difference Result 4906 states and 12392 transitions. [2021-06-04 21:45:01,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:45:01,555 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:01,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:01,559 INFO L225 Difference]: With dead ends: 4906 [2021-06-04 21:45:01,559 INFO L226 Difference]: Without dead ends: 4636 [2021-06-04 21:45:01,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=799, Invalid=2507, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:45:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-04 21:45:01,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3213. [2021-06-04 21:45:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.7640099626401) internal successors, (8878), 3212 states have internal predecessors, (8878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 8878 transitions. [2021-06-04 21:45:01,597 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 8878 transitions. Word has length 135 [2021-06-04 21:45:01,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:01,597 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 8878 transitions. [2021-06-04 21:45:01,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:01,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 8878 transitions. [2021-06-04 21:45:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:01,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:01,599 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] [2021-06-04 21:45:01,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:01,813 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:01,813 INFO L82 PathProgramCache]: Analyzing trace with hash -496808406, now seen corresponding path program 210 times [2021-06-04 21:45:01,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:01,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854938753] [2021-06-04 21:45:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:02,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854938753] [2021-06-04 21:45:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854938753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538566134] [2021-06-04 21:45:02,067 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 [2021-06-04 21:45:02,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:02,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:02,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:02,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:02,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538566134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:02,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:02,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:02,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381555402] [2021-06-04 21:45:02,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:02,318 INFO L87 Difference]: Start difference. First operand 3213 states and 8878 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) [2021-06-04 21:45:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:02,870 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-04 21:45:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:45:02,870 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 [2021-06-04 21:45:02,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:02,875 INFO L225 Difference]: With dead ends: 4931 [2021-06-04 21:45:02,875 INFO L226 Difference]: Without dead ends: 4661 [2021-06-04 21:45:02,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=809, Invalid=2497, Unknown=0, NotChecked=0, Total=3306 [2021-06-04 21:45:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-04 21:45:02,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3288. [2021-06-04 21:45:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 2.7693945847277153) internal successors, (9103), 3287 states have internal predecessors, (9103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 9103 transitions. [2021-06-04 21:45:02,915 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 9103 transitions. Word has length 135 [2021-06-04 21:45:02,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:02,915 INFO L482 AbstractCegarLoop]: Abstraction has 3288 states and 9103 transitions. [2021-06-04 21:45:02,915 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) [2021-06-04 21:45:02,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 9103 transitions. [2021-06-04 21:45:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:02,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:02,918 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] [2021-06-04 21:45:03,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:03,133 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:03,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:03,133 INFO L82 PathProgramCache]: Analyzing trace with hash -877252358, now seen corresponding path program 211 times [2021-06-04 21:45:03,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:03,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357880139] [2021-06-04 21:45:03,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:03,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:03,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:03,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357880139] [2021-06-04 21:45:03,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357880139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:03,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70074264] [2021-06-04 21:45:03,410 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 [2021-06-04 21:45:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:03,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:03,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:03,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70074264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:03,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:03,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695336454] [2021-06-04 21:45:03,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:03,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:03,686 INFO L87 Difference]: Start difference. First operand 3288 states and 9103 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:04,391 INFO L93 Difference]: Finished difference Result 4956 states and 12642 transitions. [2021-06-04 21:45:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:45:04,391 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:04,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:04,395 INFO L225 Difference]: With dead ends: 4956 [2021-06-04 21:45:04,395 INFO L226 Difference]: Without dead ends: 4686 [2021-06-04 21:45:04,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=834, Invalid=2706, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:45:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-04 21:45:04,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3363. [2021-06-04 21:45:04,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.774538964901844) internal successors, (9328), 3362 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9328 transitions. [2021-06-04 21:45:04,435 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9328 transitions. Word has length 135 [2021-06-04 21:45:04,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:04,435 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9328 transitions. [2021-06-04 21:45:04,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:04,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9328 transitions. [2021-06-04 21:45:04,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:04,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:04,437 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] [2021-06-04 21:45:04,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:04,638 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:04,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:04,638 INFO L82 PathProgramCache]: Analyzing trace with hash -252877208, now seen corresponding path program 212 times [2021-06-04 21:45:04,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:04,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741006617] [2021-06-04 21:45:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:04,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741006617] [2021-06-04 21:45:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741006617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670128248] [2021-06-04 21:45:04,884 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 [2021-06-04 21:45:04,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:04,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:04,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:05,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670128248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:05,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:05,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:05,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854705569] [2021-06-04 21:45:05,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:05,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:05,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:05,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:05,128 INFO L87 Difference]: Start difference. First operand 3363 states and 9328 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) [2021-06-04 21:45:05,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:05,716 INFO L93 Difference]: Finished difference Result 4981 states and 12767 transitions. [2021-06-04 21:45:05,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:45:05,716 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 [2021-06-04 21:45:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:05,720 INFO L225 Difference]: With dead ends: 4981 [2021-06-04 21:45:05,720 INFO L226 Difference]: Without dead ends: 4711 [2021-06-04 21:45:05,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=858, Invalid=2682, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:45:05,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-04 21:45:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3438. [2021-06-04 21:45:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 2.779458830375327) internal successors, (9553), 3437 states have internal predecessors, (9553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:05,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 9553 transitions. [2021-06-04 21:45:05,762 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 9553 transitions. Word has length 135 [2021-06-04 21:45:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:05,763 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 9553 transitions. [2021-06-04 21:45:05,763 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) [2021-06-04 21:45:05,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 9553 transitions. [2021-06-04 21:45:05,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:05,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:05,765 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] [2021-06-04 21:45:05,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:05,966 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:05,966 INFO L82 PathProgramCache]: Analyzing trace with hash 556174648, now seen corresponding path program 213 times [2021-06-04 21:45:05,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:05,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123328345] [2021-06-04 21:45:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123328345] [2021-06-04 21:45:06,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123328345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998464441] [2021-06-04 21:45:06,189 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 [2021-06-04 21:45:06,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:06,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:06,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-04 21:45:06,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998464441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:06,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:06,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534313166] [2021-06-04 21:45:06,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:06,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:06,444 INFO L87 Difference]: Start difference. First operand 3438 states and 9553 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:07,168 INFO L93 Difference]: Finished difference Result 5006 states and 12892 transitions. [2021-06-04 21:45:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:45:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:07,174 INFO L225 Difference]: With dead ends: 5006 [2021-06-04 21:45:07,174 INFO L226 Difference]: Without dead ends: 4736 [2021-06-04 21:45:07,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=864, Invalid=2918, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:45:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-04 21:45:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3513. [2021-06-04 21:45:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.7841685649202734) internal successors, (9778), 3512 states have internal predecessors, (9778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9778 transitions. [2021-06-04 21:45:07,212 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9778 transitions. Word has length 135 [2021-06-04 21:45:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:07,213 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9778 transitions. [2021-06-04 21:45:07,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9778 transitions. [2021-06-04 21:45:07,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:07,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:07,215 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] [2021-06-04 21:45:07,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-04 21:45:07,416 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:07,416 INFO L82 PathProgramCache]: Analyzing trace with hash -835775450, now seen corresponding path program 214 times [2021-06-04 21:45:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:07,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818211441] [2021-06-04 21:45:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:07,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818211441] [2021-06-04 21:45:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818211441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870537891] [2021-06-04 21:45:07,639 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 [2021-06-04 21:45:07,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:07,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:07,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870537891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:07,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:07,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:07,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941153516] [2021-06-04 21:45:07,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:07,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:07,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:07,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:07,862 INFO L87 Difference]: Start difference. First operand 3513 states and 9778 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) [2021-06-04 21:45:08,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:08,462 INFO L93 Difference]: Finished difference Result 5031 states and 13017 transitions. [2021-06-04 21:45:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:45:08,462 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 [2021-06-04 21:45:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:08,467 INFO L225 Difference]: With dead ends: 5031 [2021-06-04 21:45:08,467 INFO L226 Difference]: Without dead ends: 4761 [2021-06-04 21:45:08,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=923, Invalid=2859, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:45:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-04 21:45:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3588. [2021-06-04 21:45:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3588 states, 3587 states have (on average 2.788681349316978) internal successors, (10003), 3587 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) [2021-06-04 21:45:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 10003 transitions. [2021-06-04 21:45:08,507 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 10003 transitions. Word has length 135 [2021-06-04 21:45:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:08,507 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 10003 transitions. [2021-06-04 21:45:08,507 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) [2021-06-04 21:45:08,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 10003 transitions. [2021-06-04 21:45:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:08,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:08,510 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] [2021-06-04 21:45:08,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-04 21:45:08,711 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:08,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1080852746, now seen corresponding path program 215 times [2021-06-04 21:45:08,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:08,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061473181] [2021-06-04 21:45:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:08,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:08,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061473181] [2021-06-04 21:45:08,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061473181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:08,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73493804] [2021-06-04 21:45:08,932 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 [2021-06-04 21:45:08,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:08,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:08,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:09,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73493804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:09,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:09,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613557631] [2021-06-04 21:45:09,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:09,194 INFO L87 Difference]: Start difference. First operand 3588 states and 10003 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:09,946 INFO L93 Difference]: Finished difference Result 5056 states and 13142 transitions. [2021-06-04 21:45:09,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:45:09,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:09,950 INFO L225 Difference]: With dead ends: 5056 [2021-06-04 21:45:09,950 INFO L226 Difference]: Without dead ends: 4786 [2021-06-04 21:45:09,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 765.6ms TimeCoverageRelationStatistics Valid=952, Invalid=3080, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:45:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-04 21:45:09,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3663. [2021-06-04 21:45:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3663 states, 3662 states have (on average 2.793009284543965) internal successors, (10228), 3662 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) [2021-06-04 21:45:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10228 transitions. [2021-06-04 21:45:09,989 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10228 transitions. Word has length 135 [2021-06-04 21:45:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:09,989 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10228 transitions. [2021-06-04 21:45:09,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:09,990 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10228 transitions. [2021-06-04 21:45:09,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:09,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:09,993 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] [2021-06-04 21:45:10,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-04 21:45:10,197 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:10,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1457703068, now seen corresponding path program 216 times [2021-06-04 21:45:10,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:10,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374084063] [2021-06-04 21:45:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:10,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:10,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374084063] [2021-06-04 21:45:10,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374084063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:10,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917346323] [2021-06-04 21:45:10,393 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 [2021-06-04 21:45:10,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:10,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:10,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:10,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917346323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:10,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:10,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:10,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450191025] [2021-06-04 21:45:10,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:10,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:10,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:10,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:10,671 INFO L87 Difference]: Start difference. First operand 3663 states and 10228 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) [2021-06-04 21:45:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:11,327 INFO L93 Difference]: Finished difference Result 5081 states and 13267 transitions. [2021-06-04 21:45:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:45:11,327 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 [2021-06-04 21:45:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:11,332 INFO L225 Difference]: With dead ends: 5081 [2021-06-04 21:45:11,332 INFO L226 Difference]: Without dead ends: 4811 [2021-06-04 21:45:11,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=1004, Invalid=3028, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:45:11,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2021-06-04 21:45:11,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 3738. [2021-06-04 21:45:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3738 states, 3737 states have (on average 2.7971635001337973) internal successors, (10453), 3737 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) [2021-06-04 21:45:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10453 transitions. [2021-06-04 21:45:11,378 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10453 transitions. Word has length 135 [2021-06-04 21:45:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:11,379 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10453 transitions. [2021-06-04 21:45:11,379 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) [2021-06-04 21:45:11,379 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10453 transitions. [2021-06-04 21:45:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:11,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:11,382 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] [2021-06-04 21:45:11,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-04 21:45:11,582 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash -130947532, now seen corresponding path program 217 times [2021-06-04 21:45:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:11,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437603897] [2021-06-04 21:45:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:11,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437603897] [2021-06-04 21:45:11,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437603897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:11,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066433828] [2021-06-04 21:45:11,787 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 [2021-06-04 21:45:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:12,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066433828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:12,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:12,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304999443] [2021-06-04 21:45:12,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:12,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:12,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:12,043 INFO L87 Difference]: Start difference. First operand 3738 states and 10453 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:12,845 INFO L93 Difference]: Finished difference Result 5106 states and 13392 transitions. [2021-06-04 21:45:12,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:12,845 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:12,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:12,850 INFO L225 Difference]: With dead ends: 5106 [2021-06-04 21:45:12,850 INFO L226 Difference]: Without dead ends: 4836 [2021-06-04 21:45:12,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 797.4ms TimeCoverageRelationStatistics Valid=1035, Invalid=3255, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:45:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4836 states. [2021-06-04 21:45:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4836 to 3813. [2021-06-04 21:45:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3812 states have (on average 2.8011542497376705) internal successors, (10678), 3812 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) [2021-06-04 21:45:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10678 transitions. [2021-06-04 21:45:12,893 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10678 transitions. Word has length 135 [2021-06-04 21:45:12,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:12,893 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10678 transitions. [2021-06-04 21:45:12,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10678 transitions. [2021-06-04 21:45:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:12,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:12,896 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] [2021-06-04 21:45:13,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:13,097 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 323268642, now seen corresponding path program 218 times [2021-06-04 21:45:13,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:13,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613030343] [2021-06-04 21:45:13,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:13,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:13,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613030343] [2021-06-04 21:45:13,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613030343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:13,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028968754] [2021-06-04 21:45:13,343 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 [2021-06-04 21:45:13,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:13,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:13,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:13,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:13,608 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:13,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028968754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:13,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:13,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:13,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188420998] [2021-06-04 21:45:13,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:13,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:13,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:13,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:13,609 INFO L87 Difference]: Start difference. First operand 3813 states and 10678 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) [2021-06-04 21:45:14,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:14,388 INFO L93 Difference]: Finished difference Result 5131 states and 13517 transitions. [2021-06-04 21:45:14,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:45:14,388 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 [2021-06-04 21:45:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:14,393 INFO L225 Difference]: With dead ends: 5131 [2021-06-04 21:45:14,393 INFO L226 Difference]: Without dead ends: 4861 [2021-06-04 21:45:14,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=1101, Invalid=3189, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:45:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4861 states. [2021-06-04 21:45:14,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4861 to 3888. [2021-06-04 21:45:14,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3888 states, 3887 states have (on average 2.804990995626447) internal successors, (10903), 3887 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) [2021-06-04 21:45:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10903 transitions. [2021-06-04 21:45:14,437 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10903 transitions. Word has length 135 [2021-06-04 21:45:14,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:14,437 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10903 transitions. [2021-06-04 21:45:14,437 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) [2021-06-04 21:45:14,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10903 transitions. [2021-06-04 21:45:14,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:14,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:14,440 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] [2021-06-04 21:45:14,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-04 21:45:14,641 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:14,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:14,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1322164978, now seen corresponding path program 219 times [2021-06-04 21:45:14,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:14,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820893033] [2021-06-04 21:45:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:14,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820893033] [2021-06-04 21:45:14,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820893033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:14,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944598684] [2021-06-04 21:45:14,890 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 [2021-06-04 21:45:14,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:14,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:14,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:45:14,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:15,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944598684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:15,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:15,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:15,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772339847] [2021-06-04 21:45:15,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:15,135 INFO L87 Difference]: Start difference. First operand 3888 states and 10903 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:15,973 INFO L93 Difference]: Finished difference Result 5156 states and 13642 transitions. [2021-06-04 21:45:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:45:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:15,978 INFO L225 Difference]: With dead ends: 5156 [2021-06-04 21:45:15,978 INFO L226 Difference]: Without dead ends: 4886 [2021-06-04 21:45:15,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=1068, Invalid=3488, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:45:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-04 21:45:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3963. [2021-06-04 21:45:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3963 states, 3962 states have (on average 2.8086824835941444) internal successors, (11128), 3962 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) [2021-06-04 21:45:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 11128 transitions. [2021-06-04 21:45:16,028 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 11128 transitions. Word has length 135 [2021-06-04 21:45:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:16,028 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 11128 transitions. [2021-06-04 21:45:16,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 11128 transitions. [2021-06-04 21:45:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:16,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:16,032 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] [2021-06-04 21:45:16,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:16,232 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash -557162912, now seen corresponding path program 220 times [2021-06-04 21:45:16,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:16,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449359015] [2021-06-04 21:45:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:16,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:16,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449359015] [2021-06-04 21:45:16,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449359015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:16,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946756645] [2021-06-04 21:45:16,428 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 [2021-06-04 21:45:16,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:16,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:16,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:16,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946756645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:16,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:16,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:16,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722237655] [2021-06-04 21:45:16,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:16,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:16,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:16,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:16,662 INFO L87 Difference]: Start difference. First operand 3963 states and 11128 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) [2021-06-04 21:45:17,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:17,353 INFO L93 Difference]: Finished difference Result 5181 states and 13767 transitions. [2021-06-04 21:45:17,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:45:17,354 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 [2021-06-04 21:45:17,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:17,359 INFO L225 Difference]: With dead ends: 5181 [2021-06-04 21:45:17,359 INFO L226 Difference]: Without dead ends: 4911 [2021-06-04 21:45:17,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 688.6ms TimeCoverageRelationStatistics Valid=1214, Invalid=3342, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:45:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2021-06-04 21:45:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4038. [2021-06-04 21:45:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 4037 states have (on average 2.812236809512014) internal successors, (11353), 4037 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) [2021-06-04 21:45:17,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11353 transitions. [2021-06-04 21:45:17,407 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11353 transitions. Word has length 135 [2021-06-04 21:45:17,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:17,407 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11353 transitions. [2021-06-04 21:45:17,407 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) [2021-06-04 21:45:17,407 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11353 transitions. [2021-06-04 21:45:17,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:17,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:17,410 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] [2021-06-04 21:45:17,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-04 21:45:17,611 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:17,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:17,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1473156400, now seen corresponding path program 221 times [2021-06-04 21:45:17,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:17,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417278139] [2021-06-04 21:45:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:17,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:17,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417278139] [2021-06-04 21:45:17,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417278139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:17,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012133787] [2021-06-04 21:45:17,811 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 [2021-06-04 21:45:17,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-04 21:45:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:18,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012133787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:18,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:18,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:18,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613131512] [2021-06-04 21:45:18,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:18,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:18,044 INFO L87 Difference]: Start difference. First operand 4038 states and 11353 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:18,941 INFO L93 Difference]: Finished difference Result 5206 states and 13892 transitions. [2021-06-04 21:45:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:45:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:18,946 INFO L225 Difference]: With dead ends: 5206 [2021-06-04 21:45:18,946 INFO L226 Difference]: Without dead ends: 4936 [2021-06-04 21:45:18,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=1249, Invalid=3581, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:45:18,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-06-04 21:45:18,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4113. [2021-06-04 21:45:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.815661478599222) internal successors, (11578), 4112 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) [2021-06-04 21:45:18,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11578 transitions. [2021-06-04 21:45:18,990 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11578 transitions. Word has length 135 [2021-06-04 21:45:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:18,990 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11578 transitions. [2021-06-04 21:45:18,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11578 transitions. [2021-06-04 21:45:18,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:18,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:18,993 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] [2021-06-04 21:45:19,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:19,194 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2087395870, now seen corresponding path program 222 times [2021-06-04 21:45:19,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:19,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838376588] [2021-06-04 21:45:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:19,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:19,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838376588] [2021-06-04 21:45:19,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838376588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:19,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324930733] [2021-06-04 21:45:19,386 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 [2021-06-04 21:45:19,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-04 21:45:19,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:19,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:45:19,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:19,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324930733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:19,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:19,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:19,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025504312] [2021-06-04 21:45:19,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:19,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:19,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:19,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:19,612 INFO L87 Difference]: Start difference. First operand 4113 states and 11578 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) [2021-06-04 21:45:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:20,350 INFO L93 Difference]: Finished difference Result 5231 states and 14017 transitions. [2021-06-04 21:45:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:45:20,350 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 [2021-06-04 21:45:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:20,355 INFO L225 Difference]: With dead ends: 5231 [2021-06-04 21:45:20,355 INFO L226 Difference]: Without dead ends: 4961 [2021-06-04 21:45:20,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 712.3ms TimeCoverageRelationStatistics Valid=1343, Invalid=3487, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:45:20,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-04 21:45:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 4188. [2021-06-04 21:45:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.818963458323382) internal successors, (11803), 4187 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) [2021-06-04 21:45:20,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11803 transitions. [2021-06-04 21:45:20,405 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11803 transitions. Word has length 135 [2021-06-04 21:45:20,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:20,405 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11803 transitions. [2021-06-04 21:45:20,405 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) [2021-06-04 21:45:20,405 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11803 transitions. [2021-06-04 21:45:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:20,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:20,408 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] [2021-06-04 21:45:20,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:20,609 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash 372153582, now seen corresponding path program 223 times [2021-06-04 21:45:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638932427] [2021-06-04 21:45:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:20,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:20,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638932427] [2021-06-04 21:45:20,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638932427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141758233] [2021-06-04 21:45:20,829 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 [2021-06-04 21:45:20,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:20,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-04 21:45:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:21,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141758233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:21,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:21,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:21,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159313802] [2021-06-04 21:45:21,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:21,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:21,063 INFO L87 Difference]: Start difference. First operand 4188 states and 11803 transitions. Second operand has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:22,013 INFO L93 Difference]: Finished difference Result 5316 states and 14307 transitions. [2021-06-04 21:45:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:22,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:45:22,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:22,019 INFO L225 Difference]: With dead ends: 5316 [2021-06-04 21:45:22,019 INFO L226 Difference]: Without dead ends: 5046 [2021-06-04 21:45:22,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=1380, Invalid=3732, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:45:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5046 states. [2021-06-04 21:45:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5046 to 4263. [2021-06-04 21:45:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.8268418582824966) internal successors, (12048), 4262 states have internal predecessors, (12048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 12048 transitions. [2021-06-04 21:45:22,069 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 12048 transitions. Word has length 135 [2021-06-04 21:45:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:22,069 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 12048 transitions. [2021-06-04 21:45:22,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 4.964285714285714) internal successors, (139), 28 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 12048 transitions. [2021-06-04 21:45:22,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:22,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:22,073 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] [2021-06-04 21:45:22,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:22,273 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:22,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:22,273 INFO L82 PathProgramCache]: Analyzing trace with hash -660494020, now seen corresponding path program 224 times [2021-06-04 21:45:22,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:22,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98879644] [2021-06-04 21:45:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:22,470 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:22,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98879644] [2021-06-04 21:45:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98879644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113708996] [2021-06-04 21:45:22,471 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 [2021-06-04 21:45:22,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:22,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:22,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113708996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:22,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:22,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-04 21:45:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684552872] [2021-06-04 21:45:22,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-04 21:45:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:22,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-04 21:45:22,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-04 21:45:22,683 INFO L87 Difference]: Start difference. First operand 4263 states and 12048 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) [2021-06-04 21:45:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:23,481 INFO L93 Difference]: Finished difference Result 6058 states and 16431 transitions. [2021-06-04 21:45:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:45:23,482 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 [2021-06-04 21:45:23,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:23,488 INFO L225 Difference]: With dead ends: 6058 [2021-06-04 21:45:23,488 INFO L226 Difference]: Without dead ends: 5788 [2021-06-04 21:45:23,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 770.9ms TimeCoverageRelationStatistics Valid=1489, Invalid=3623, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:45:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-06-04 21:45:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 4443. [2021-06-04 21:45:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4443 states, 4442 states have (on average 2.8381359747861326) internal successors, (12607), 4442 states have internal predecessors, (12607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4443 states to 4443 states and 12607 transitions. [2021-06-04 21:45:23,534 INFO L78 Accepts]: Start accepts. Automaton has 4443 states and 12607 transitions. Word has length 135 [2021-06-04 21:45:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:23,534 INFO L482 AbstractCegarLoop]: Abstraction has 4443 states and 12607 transitions. [2021-06-04 21:45:23,534 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) [2021-06-04 21:45:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4443 states and 12607 transitions. [2021-06-04 21:45:23,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-04 21:45:23,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:23,537 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] [2021-06-04 21:45:23,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:23,738 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:23,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:23,738 INFO L82 PathProgramCache]: Analyzing trace with hash -638150770, now seen corresponding path program 225 times [2021-06-04 21:45:23,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:23,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494536672] [2021-06-04 21:45:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:23,917 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:23,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:23,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494536672] [2021-06-04 21:45:23,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494536672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:23,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5330758] [2021-06-04 21:45:23,918 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 [2021-06-04 21:45:23,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-04 21:45:23,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:24,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5330758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:24,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:24,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-04 21:45:24,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336756165] [2021-06-04 21:45:24,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:24,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:24,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:24,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:24,156 INFO L87 Difference]: Start difference. First operand 4443 states and 12607 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) [2021-06-04 21:45:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:25,158 INFO L93 Difference]: Finished difference Result 5926 states and 16096 transitions. [2021-06-04 21:45:25,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:45:25,159 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 [2021-06-04 21:45:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:25,163 INFO L225 Difference]: With dead ends: 5926 [2021-06-04 21:45:25,163 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:45:25,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 933.6ms TimeCoverageRelationStatistics Valid=1436, Invalid=4416, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:45:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:45:25,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4478. [2021-06-04 21:45:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.832923832923833) internal successors, (12683), 4477 states have internal predecessors, (12683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12683 transitions. [2021-06-04 21:45:25,205 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12683 transitions. Word has length 135 [2021-06-04 21:45:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:25,206 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12683 transitions. [2021-06-04 21:45:25,206 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) [2021-06-04 21:45:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12683 transitions. [2021-06-04 21:45:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:25,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:25,209 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] [2021-06-04 21:45:25,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-04 21:45:25,412 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:25,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:25,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2057178814, now seen corresponding path program 226 times [2021-06-04 21:45:25,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:25,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264263651] [2021-06-04 21:45:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:25,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:25,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264263651] [2021-06-04 21:45:25,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264263651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:25,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011329983] [2021-06-04 21:45:25,674 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 [2021-06-04 21:45:25,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:25,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:25,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:25,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:25,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011329983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:25,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:25,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-04 21:45:25,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208226527] [2021-06-04 21:45:25,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:45:25,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:45:25,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:45:25,947 INFO L87 Difference]: Start difference. First operand 4478 states and 12683 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) [2021-06-04 21:45:26,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:26,517 INFO L93 Difference]: Finished difference Result 5668 states and 15383 transitions. [2021-06-04 21:45:26,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:45:26,517 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 [2021-06-04 21:45:26,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:26,523 INFO L225 Difference]: With dead ends: 5668 [2021-06-04 21:45:26,523 INFO L226 Difference]: Without dead ends: 5334 [2021-06-04 21:45:26,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 658.0ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:26,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-04 21:45:26,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4563. [2021-06-04 21:45:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 2.817404647084612) internal successors, (12853), 4562 states have internal predecessors, (12853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12853 transitions. [2021-06-04 21:45:26,569 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12853 transitions. Word has length 140 [2021-06-04 21:45:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:26,569 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12853 transitions. [2021-06-04 21:45:26,569 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) [2021-06-04 21:45:26,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12853 transitions. [2021-06-04 21:45:26,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:26,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:26,573 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] [2021-06-04 21:45:26,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-04 21:45:26,773 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash -416801150, now seen corresponding path program 227 times [2021-06-04 21:45:26,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:26,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729598557] [2021-06-04 21:45:26,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:27,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729598557] [2021-06-04 21:45:27,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729598557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:27,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855347567] [2021-06-04 21:45:27,072 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 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 [2021-06-04 21:45:27,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:27,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:27,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:27,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855347567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:27,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:27,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:27,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75675706] [2021-06-04 21:45:27,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:27,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:27,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:27,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:27,324 INFO L87 Difference]: Start difference. First operand 4563 states and 12853 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) [2021-06-04 21:45:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:27,770 INFO L93 Difference]: Finished difference Result 6561 states and 16977 transitions. [2021-06-04 21:45:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-04 21:45:27,770 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 [2021-06-04 21:45:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:27,777 INFO L225 Difference]: With dead ends: 6561 [2021-06-04 21:45:27,778 INFO L226 Difference]: Without dead ends: 6291 [2021-06-04 21:45:27,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-04 21:45:27,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6291 states. [2021-06-04 21:45:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6291 to 4578. [2021-06-04 21:45:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:27,832 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:27,832 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:27,832 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) [2021-06-04 21:45:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:27,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:27,835 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] [2021-06-04 21:45:28,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-04 21:45:28,036 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:28,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1293535918, now seen corresponding path program 228 times [2021-06-04 21:45:28,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:28,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153978188] [2021-06-04 21:45:28,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:28,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:28,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153978188] [2021-06-04 21:45:28,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153978188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:28,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170720972] [2021-06-04 21:45:28,299 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 [2021-06-04 21:45:28,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:28,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:28,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170720972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:28,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:28,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:28,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037130962] [2021-06-04 21:45:28,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:28,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:28,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:28,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:28,581 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:29,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:29,098 INFO L93 Difference]: Finished difference Result 6446 states and 16747 transitions. [2021-06-04 21:45:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:45:29,099 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 [2021-06-04 21:45:29,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:29,103 INFO L225 Difference]: With dead ends: 6446 [2021-06-04 21:45:29,104 INFO L226 Difference]: Without dead ends: 6176 [2021-06-04 21:45:29,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:45:29,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6176 states. [2021-06-04 21:45:29,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6176 to 4578. [2021-06-04 21:45:29,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:29,147 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:29,147 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:29,147 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) [2021-06-04 21:45:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:29,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:29,151 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] [2021-06-04 21:45:29,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:29,351 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1264105024, now seen corresponding path program 229 times [2021-06-04 21:45:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:29,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800739465] [2021-06-04 21:45:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:29,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:29,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800739465] [2021-06-04 21:45:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800739465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:29,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793183767] [2021-06-04 21:45:29,590 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 [2021-06-04 21:45:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:29,822 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:29,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793183767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:29,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:29,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:29,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014941379] [2021-06-04 21:45:29,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:29,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:29,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:29,823 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:30,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:30,298 INFO L93 Difference]: Finished difference Result 6421 states and 16697 transitions. [2021-06-04 21:45:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-04 21:45:30,299 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 [2021-06-04 21:45:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:30,305 INFO L225 Difference]: With dead ends: 6421 [2021-06-04 21:45:30,305 INFO L226 Difference]: Without dead ends: 6151 [2021-06-04 21:45:30,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-04 21:45:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-04 21:45:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4578. [2021-06-04 21:45:30,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:30,356 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:30,356 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:30,356 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) [2021-06-04 21:45:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:30,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:30,360 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] [2021-06-04 21:45:30,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-04 21:45:30,560 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:30,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:30,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1666313968, now seen corresponding path program 230 times [2021-06-04 21:45:30,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:30,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333264718] [2021-06-04 21:45:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:30,811 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:30,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:30,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333264718] [2021-06-04 21:45:30,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333264718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:30,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547875202] [2021-06-04 21:45:30,812 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 [2021-06-04 21:45:30,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:30,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:30,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:30,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:31,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547875202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:31,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:31,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:31,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646074218] [2021-06-04 21:45:31,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:31,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:31,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:31,085 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:31,632 INFO L93 Difference]: Finished difference Result 6371 states and 16597 transitions. [2021-06-04 21:45:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:45:31,632 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 [2021-06-04 21:45:31,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:31,638 INFO L225 Difference]: With dead ends: 6371 [2021-06-04 21:45:31,638 INFO L226 Difference]: Without dead ends: 6101 [2021-06-04 21:45:31,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-04 21:45:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4578. [2021-06-04 21:45:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:31,689 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:31,689 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:31,689 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) [2021-06-04 21:45:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:31,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:31,693 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] [2021-06-04 21:45:31,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:31,901 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:31,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:31,901 INFO L82 PathProgramCache]: Analyzing trace with hash 351421310, now seen corresponding path program 231 times [2021-06-04 21:45:31,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:31,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354215311] [2021-06-04 21:45:31,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:32,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354215311] [2021-06-04 21:45:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354215311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331335445] [2021-06-04 21:45:32,130 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 [2021-06-04 21:45:32,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:32,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:32,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-04 21:45:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331335445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:32,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:32,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:32,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359763377] [2021-06-04 21:45:32,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:32,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:32,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:32,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:32,369 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:32,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:32,877 INFO L93 Difference]: Finished difference Result 6321 states and 16497 transitions. [2021-06-04 21:45:32,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:45:32,878 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 [2021-06-04 21:45:32,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:32,884 INFO L225 Difference]: With dead ends: 6321 [2021-06-04 21:45:32,884 INFO L226 Difference]: Without dead ends: 6051 [2021-06-04 21:45:32,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 562.7ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:45:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-04 21:45:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4578. [2021-06-04 21:45:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:32,949 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:32,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:32,949 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:32,949 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) [2021-06-04 21:45:32,949 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:32,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:32,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:32,953 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] [2021-06-04 21:45:33,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-04 21:45:33,154 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -547102130, now seen corresponding path program 232 times [2021-06-04 21:45:33,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:33,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329564862] [2021-06-04 21:45:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:33,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329564862] [2021-06-04 21:45:33,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329564862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:33,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663602970] [2021-06-04 21:45:33,395 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 [2021-06-04 21:45:33,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:33,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:33,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:33,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663602970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:33,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:33,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:33,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905826511] [2021-06-04 21:45:33,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:33,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:33,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:33,649 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:34,261 INFO L93 Difference]: Finished difference Result 6271 states and 16397 transitions. [2021-06-04 21:45:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:45:34,261 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 [2021-06-04 21:45:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:34,267 INFO L225 Difference]: With dead ends: 6271 [2021-06-04 21:45:34,267 INFO L226 Difference]: Without dead ends: 6001 [2021-06-04 21:45:34,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 682.2ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:45:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-04 21:45:34,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4578. [2021-06-04 21:45:34,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:34,317 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:34,317 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:34,317 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) [2021-06-04 21:45:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:34,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:34,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:34,321 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] [2021-06-04 21:45:34,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:34,521 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:34,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:34,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2132911676, now seen corresponding path program 233 times [2021-06-04 21:45:34,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:34,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040230972] [2021-06-04 21:45:34,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:34,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040230972] [2021-06-04 21:45:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040230972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838383321] [2021-06-04 21:45:34,748 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 [2021-06-04 21:45:34,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:34,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:34,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838383321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:34,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:34,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:35,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241680348] [2021-06-04 21:45:35,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:35,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:35,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:35,000 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:35,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:35,553 INFO L93 Difference]: Finished difference Result 6221 states and 16297 transitions. [2021-06-04 21:45:35,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:45:35,553 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 [2021-06-04 21:45:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:35,560 INFO L225 Difference]: With dead ends: 6221 [2021-06-04 21:45:35,560 INFO L226 Difference]: Without dead ends: 5951 [2021-06-04 21:45:35,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 612.4ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:45:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-04 21:45:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4578. [2021-06-04 21:45:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:35,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:35,613 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:35,613 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:35,613 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) [2021-06-04 21:45:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:35,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:35,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:35,617 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] [2021-06-04 21:45:35,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:35,818 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:35,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1752467724, now seen corresponding path program 234 times [2021-06-04 21:45:35,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:35,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322096338] [2021-06-04 21:45:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:36,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322096338] [2021-06-04 21:45:36,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322096338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:36,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083133997] [2021-06-04 21:45:36,078 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 [2021-06-04 21:45:36,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:36,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:36,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:36,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:36,360 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:36,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083133997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:36,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:36,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:36,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584930802] [2021-06-04 21:45:36,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:36,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:36,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:36,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:36,369 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:37,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:37,099 INFO L93 Difference]: Finished difference Result 6171 states and 16197 transitions. [2021-06-04 21:45:37,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:45:37,100 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 [2021-06-04 21:45:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:37,105 INFO L225 Difference]: With dead ends: 6171 [2021-06-04 21:45:37,105 INFO L226 Difference]: Without dead ends: 5901 [2021-06-04 21:45:37,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 767.1ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-04 21:45:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4578. [2021-06-04 21:45:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:37,167 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:37,167 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:37,167 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) [2021-06-04 21:45:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:37,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:37,171 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] [2021-06-04 21:45:37,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:37,377 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:37,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:37,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1918124422, now seen corresponding path program 235 times [2021-06-04 21:45:37,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:37,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073128678] [2021-06-04 21:45:37,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:37,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:37,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073128678] [2021-06-04 21:45:37,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073128678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797032572] [2021-06-04 21:45:37,600 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 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 [2021-06-04 21:45:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:37,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:37,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797032572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:37,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:37,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:37,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92159469] [2021-06-04 21:45:37,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:37,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:37,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:37,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:37,833 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:38,409 INFO L93 Difference]: Finished difference Result 6121 states and 16097 transitions. [2021-06-04 21:45:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:45:38,410 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 [2021-06-04 21:45:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:38,415 INFO L225 Difference]: With dead ends: 6121 [2021-06-04 21:45:38,415 INFO L226 Difference]: Without dead ends: 5851 [2021-06-04 21:45:38,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 622.8ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:45:38,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-04 21:45:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4578. [2021-06-04 21:45:38,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:38,460 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:38,460 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:38,460 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) [2021-06-04 21:45:38,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:38,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:38,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:38,464 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] [2021-06-04 21:45:38,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-04 21:45:38,664 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:38,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:38,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1109072566, now seen corresponding path program 236 times [2021-06-04 21:45:38,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:38,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861096696] [2021-06-04 21:45:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:38,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861096696] [2021-06-04 21:45:38,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861096696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123361073] [2021-06-04 21:45:38,891 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 [2021-06-04 21:45:38,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:38,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:39,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123361073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:39,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:39,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:39,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304582240] [2021-06-04 21:45:39,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:39,161 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:39,892 INFO L93 Difference]: Finished difference Result 6071 states and 15997 transitions. [2021-06-04 21:45:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:45:39,893 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 [2021-06-04 21:45:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:39,899 INFO L225 Difference]: With dead ends: 6071 [2021-06-04 21:45:39,899 INFO L226 Difference]: Without dead ends: 5801 [2021-06-04 21:45:39,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 761.3ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-04 21:45:39,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4578. [2021-06-04 21:45:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:39,950 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:39,950 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:39,950 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) [2021-06-04 21:45:39,950 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:39,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:39,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:39,954 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] [2021-06-04 21:45:40,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-04 21:45:40,155 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:40,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:40,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1793944632, now seen corresponding path program 237 times [2021-06-04 21:45:40,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:40,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824439706] [2021-06-04 21:45:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:40,371 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:40,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824439706] [2021-06-04 21:45:40,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824439706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:40,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653804568] [2021-06-04 21:45:40,371 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 [2021-06-04 21:45:40,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:40,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:45:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:40,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653804568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:40,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:40,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:40,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398605354] [2021-06-04 21:45:40,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:40,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:40,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:40,597 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:41,240 INFO L93 Difference]: Finished difference Result 6021 states and 15897 transitions. [2021-06-04 21:45:41,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:45:41,240 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 [2021-06-04 21:45:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:41,245 INFO L225 Difference]: With dead ends: 6021 [2021-06-04 21:45:41,245 INFO L226 Difference]: Without dead ends: 5751 [2021-06-04 21:45:41,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 666.6ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:45:41,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-04 21:45:41,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4578. [2021-06-04 21:45:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:41,293 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:41,293 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:41,293 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) [2021-06-04 21:45:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:41,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:41,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:41,296 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] [2021-06-04 21:45:41,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-04 21:45:41,497 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:41,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:41,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1548867336, now seen corresponding path program 238 times [2021-06-04 21:45:41,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:41,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339486325] [2021-06-04 21:45:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:41,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339486325] [2021-06-04 21:45:41,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339486325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:41,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588204022] [2021-06-04 21:45:41,715 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 [2021-06-04 21:45:41,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:41,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:41,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:41,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588204022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:41,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:41,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:41,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103946319] [2021-06-04 21:45:41,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:41,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:41,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:41,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:41,955 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:42,808 INFO L93 Difference]: Finished difference Result 5971 states and 15797 transitions. [2021-06-04 21:45:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:42,809 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 [2021-06-04 21:45:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:42,815 INFO L225 Difference]: With dead ends: 5971 [2021-06-04 21:45:42,815 INFO L226 Difference]: Without dead ends: 5701 [2021-06-04 21:45:42,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 828.6ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-04 21:45:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4578. [2021-06-04 21:45:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:42,867 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:42,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:42,867 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:42,867 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) [2021-06-04 21:45:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:42,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:42,871 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] [2021-06-04 21:45:43,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-04 21:45:43,085 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1172017014, now seen corresponding path program 239 times [2021-06-04 21:45:43,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:43,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595073558] [2021-06-04 21:45:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:43,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595073558] [2021-06-04 21:45:43,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595073558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:43,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273453706] [2021-06-04 21:45:43,313 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 [2021-06-04 21:45:43,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:43,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:43,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273453706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:43,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:43,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807671338] [2021-06-04 21:45:43,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:43,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:43,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:43,565 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:44,245 INFO L93 Difference]: Finished difference Result 5921 states and 15697 transitions. [2021-06-04 21:45:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:45:44,245 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 [2021-06-04 21:45:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:44,251 INFO L225 Difference]: With dead ends: 5921 [2021-06-04 21:45:44,251 INFO L226 Difference]: Without dead ends: 5651 [2021-06-04 21:45:44,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 705.7ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:45:44,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-04 21:45:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4578. [2021-06-04 21:45:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:44,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:44,295 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:44,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:44,295 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:44,296 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) [2021-06-04 21:45:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:44,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:44,299 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] [2021-06-04 21:45:44,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-04 21:45:44,500 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1796194746, now seen corresponding path program 240 times [2021-06-04 21:45:44,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:44,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796338991] [2021-06-04 21:45:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:44,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796338991] [2021-06-04 21:45:44,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796338991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940685389] [2021-06-04 21:45:44,720 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 [2021-06-04 21:45:44,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:45:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:44,961 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:44,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940685389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:44,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:44,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:44,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341997573] [2021-06-04 21:45:44,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:44,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:44,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:44,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:44,962 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:45,773 INFO L93 Difference]: Finished difference Result 5871 states and 15597 transitions. [2021-06-04 21:45:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:45:45,773 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 [2021-06-04 21:45:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:45,779 INFO L225 Difference]: With dead ends: 5871 [2021-06-04 21:45:45,779 INFO L226 Difference]: Without dead ends: 5601 [2021-06-04 21:45:45,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 799.1ms TimeCoverageRelationStatistics Valid=999, Invalid=3423, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-04 21:45:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4578. [2021-06-04 21:45:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:45,826 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:45,826 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:45,826 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) [2021-06-04 21:45:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:45,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:45,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:45,830 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] [2021-06-04 21:45:46,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:46,030 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:46,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:46,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1341978572, now seen corresponding path program 241 times [2021-06-04 21:45:46,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:46,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734452720] [2021-06-04 21:45:46,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:46,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:46,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734452720] [2021-06-04 21:45:46,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734452720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:46,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831871300] [2021-06-04 21:45:46,236 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 [2021-06-04 21:45:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:46,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:46,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:46,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831871300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:46,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:46,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:46,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170858279] [2021-06-04 21:45:46,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:46,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:46,459 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:47,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:47,179 INFO L93 Difference]: Finished difference Result 5821 states and 15497 transitions. [2021-06-04 21:45:47,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:45:47,179 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 [2021-06-04 21:45:47,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:47,185 INFO L225 Difference]: With dead ends: 5821 [2021-06-04 21:45:47,186 INFO L226 Difference]: Without dead ends: 5551 [2021-06-04 21:45:47,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:45:47,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-04 21:45:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4578. [2021-06-04 21:45:47,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:47,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:47,241 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:47,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:47,241 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:47,241 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) [2021-06-04 21:45:47,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:47,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:47,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:47,244 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] [2021-06-04 21:45:47,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-04 21:45:47,453 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -343082236, now seen corresponding path program 242 times [2021-06-04 21:45:47,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:47,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706775026] [2021-06-04 21:45:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:47,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706775026] [2021-06-04 21:45:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706775026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514605975] [2021-06-04 21:45:47,683 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 [2021-06-04 21:45:47,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:47,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:47,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:47,930 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:47,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514605975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:47,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:47,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:47,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609199630] [2021-06-04 21:45:47,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:47,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:47,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:47,931 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:48,849 INFO L93 Difference]: Finished difference Result 5771 states and 15397 transitions. [2021-06-04 21:45:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:45:48,849 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 [2021-06-04 21:45:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:48,855 INFO L225 Difference]: With dead ends: 5771 [2021-06-04 21:45:48,855 INFO L226 Difference]: Without dead ends: 5501 [2021-06-04 21:45:48,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 874.5ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-04 21:45:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4578. [2021-06-04 21:45:48,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:48,900 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:48,900 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:48,900 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) [2021-06-04 21:45:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:48,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:48,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:48,903 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] [2021-06-04 21:45:49,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:49,104 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2072557170, now seen corresponding path program 243 times [2021-06-04 21:45:49,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:49,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783068329] [2021-06-04 21:45:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:49,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783068329] [2021-06-04 21:45:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783068329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:49,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244952649] [2021-06-04 21:45:49,317 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 [2021-06-04 21:45:49,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:49,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:49,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:45:49,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:49,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244952649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:49,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:49,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562228677] [2021-06-04 21:45:49,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:49,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:49,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:49,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:49,579 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:50,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:50,410 INFO L93 Difference]: Finished difference Result 5721 states and 15297 transitions. [2021-06-04 21:45:50,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:45:50,410 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 [2021-06-04 21:45:50,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:50,416 INFO L225 Difference]: With dead ends: 5721 [2021-06-04 21:45:50,416 INFO L226 Difference]: Without dead ends: 5451 [2021-06-04 21:45:50,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 791.3ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:45:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-04 21:45:50,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4578. [2021-06-04 21:45:50,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:50,464 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:50,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:50,464 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:50,464 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) [2021-06-04 21:45:50,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:50,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:50,468 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] [2021-06-04 21:45:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:50,669 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -192090814, now seen corresponding path program 244 times [2021-06-04 21:45:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738407022] [2021-06-04 21:45:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:50,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:50,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738407022] [2021-06-04 21:45:50,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738407022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:50,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762333018] [2021-06-04 21:45:50,957 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 [2021-06-04 21:45:51,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:45:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:51,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762333018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:51,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:51,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:51,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013542903] [2021-06-04 21:45:51,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:51,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:51,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:51,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:51,200 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:52,282 INFO L93 Difference]: Finished difference Result 5671 states and 15197 transitions. [2021-06-04 21:45:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:52,283 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 [2021-06-04 21:45:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:52,287 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:45:52,287 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:45:52,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1047.9ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:45:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:45:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4578. [2021-06-04 21:45:52,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:52,330 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:52,330 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:52,330 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) [2021-06-04 21:45:52,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:52,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:52,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:52,333 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] [2021-06-04 21:45:52,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:52,550 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 422148656, now seen corresponding path program 245 times [2021-06-04 21:45:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:52,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902156973] [2021-06-04 21:45:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:52,797 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:52,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902156973] [2021-06-04 21:45:52,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902156973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:52,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649312074] [2021-06-04 21:45:52,797 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 [2021-06-04 21:45:52,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:45:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:52,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:53,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649312074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:53,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:53,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:53,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019820357] [2021-06-04 21:45:53,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:53,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:53,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:53,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:53,047 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:53,852 INFO L93 Difference]: Finished difference Result 5621 states and 15097 transitions. [2021-06-04 21:45:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:45:53,853 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 [2021-06-04 21:45:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:53,858 INFO L225 Difference]: With dead ends: 5621 [2021-06-04 21:45:53,858 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:45:53,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:45:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:45:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4578. [2021-06-04 21:45:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 2.814725802927682) internal successors, (12883), 4577 states have internal predecessors, (12883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:45:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12883 transitions. [2021-06-04 21:45:53,904 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12883 transitions. Word has length 140 [2021-06-04 21:45:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:53,904 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12883 transitions. [2021-06-04 21:45:53,904 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) [2021-06-04 21:45:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12883 transitions. [2021-06-04 21:45:53,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:53,908 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:53,908 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] [2021-06-04 21:45:54,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:45:54,121 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:54,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:54,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1293093632, now seen corresponding path program 246 times [2021-06-04 21:45:54,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:54,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188396889] [2021-06-04 21:45:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:54,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:54,326 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:54,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:54,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188396889] [2021-06-04 21:45:54,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188396889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:54,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598467111] [2021-06-04 21:45:54,327 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 [2021-06-04 21:45:54,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:45:54,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:45:54,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:54,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598467111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:54,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:54,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:54,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824135775] [2021-06-04 21:45:54,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:54,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:54,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:54,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:54,567 INFO L87 Difference]: Start difference. First operand 4578 states and 12883 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) [2021-06-04 21:45:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:55,509 INFO L93 Difference]: Finished difference Result 5631 states and 15147 transitions. [2021-06-04 21:45:55,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:45:55,509 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 [2021-06-04 21:45:55,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:55,514 INFO L225 Difference]: With dead ends: 5631 [2021-06-04 21:45:55,515 INFO L226 Difference]: Without dead ends: 5361 [2021-06-04 21:45:55,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 903.7ms TimeCoverageRelationStatistics Valid=1284, Invalid=3972, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:45:55,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-04 21:45:55,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4578. [2021-06-04 21:45:55,552 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) [2021-06-04 21:45:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-04 21:45:55,558 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-04 21:45:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:55,558 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-04 21:45:55,558 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) [2021-06-04 21:45:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-04 21:45:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:55,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:55,561 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] [2021-06-04 21:45:55,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-04 21:45:55,762 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:55,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1969226062, now seen corresponding path program 247 times [2021-06-04 21:45:55,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:55,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560410549] [2021-06-04 21:45:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:55,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:55,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560410549] [2021-06-04 21:45:55,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560410549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:55,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196759575] [2021-06-04 21:45:55,964 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 [2021-06-04 21:45:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:56,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-04 21:45:56,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:56,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196759575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:56,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:56,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-04 21:45:56,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286403600] [2021-06-04 21:45:56,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-04 21:45:56,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-04 21:45:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-04 21:45:56,192 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) [2021-06-04 21:45:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:57,019 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-04 21:45:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:45:57,020 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 [2021-06-04 21:45:57,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:57,027 INFO L225 Difference]: With dead ends: 6398 [2021-06-04 21:45:57,027 INFO L226 Difference]: Without dead ends: 6128 [2021-06-04 21:45:57,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:45:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-04 21:45:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-04 21:45:57,072 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) [2021-06-04 21:45:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-04 21:45:57,079 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-04 21:45:57,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:57,079 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-04 21:45:57,079 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) [2021-06-04 21:45:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-04 21:45:57,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-04 21:45:57,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:57,082 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] [2021-06-04 21:45:57,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-04 21:45:57,284 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1991569312, now seen corresponding path program 248 times [2021-06-04 21:45:57,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:57,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109445225] [2021-06-04 21:45:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:57,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:57,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109445225] [2021-06-04 21:45:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109445225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:57,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618817819] [2021-06-04 21:45:57,518 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 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 [2021-06-04 21:45:57,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:45:57,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:57,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:57,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618817819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:57,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:57,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-04 21:45:57,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800511435] [2021-06-04 21:45:57,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:57,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:57,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:57,751 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) [2021-06-04 21:45:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:45:58,767 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-04 21:45:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:45:58,767 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 [2021-06-04 21:45:58,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:45:58,774 INFO L225 Difference]: With dead ends: 6221 [2021-06-04 21:45:58,774 INFO L226 Difference]: Without dead ends: 5646 [2021-06-04 21:45:58,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1004.5ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:45:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-04 21:45:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-04 21:45:58,808 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) [2021-06-04 21:45:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-04 21:45:58,812 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-04 21:45:58,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:45:58,812 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-04 21:45:58,812 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) [2021-06-04 21:45:58,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-04 21:45:58,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:45:58,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:45:58,814 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] [2021-06-04 21:45:59,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-04 21:45:59,016 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:45:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:45:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1192364991, now seen corresponding path program 249 times [2021-06-04 21:45:59,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:45:59,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371172421] [2021-06-04 21:45:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:45:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:45:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:45:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371172421] [2021-06-04 21:45:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371172421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319145265] [2021-06-04 21:45:59,273 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 [2021-06-04 21:45:59,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:45:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:45:59,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:45:59,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:45:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:45:59,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319145265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:45:59,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:45:59,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:45:59,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787987240] [2021-06-04 21:45:59,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:45:59,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:45:59,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:45:59,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:45:59,524 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) [2021-06-04 21:46:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:00,023 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-04 21:46:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:46:00,023 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 [2021-06-04 21:46:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:00,026 INFO L225 Difference]: With dead ends: 4721 [2021-06-04 21:46:00,027 INFO L226 Difference]: Without dead ends: 4451 [2021-06-04 21:46:00,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:46:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-04 21:46:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-04 21:46:00,054 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) [2021-06-04 21:46:00,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-04 21:46:00,057 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-04 21:46:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:00,058 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-04 21:46:00,058 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) [2021-06-04 21:46:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-04 21:46:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:00,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:00,060 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] [2021-06-04 21:46:00,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-04 21:46:00,260 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:00,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash 315630223, now seen corresponding path program 250 times [2021-06-04 21:46:00,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:00,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664111574] [2021-06-04 21:46:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:00,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664111574] [2021-06-04 21:46:00,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664111574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456697327] [2021-06-04 21:46:00,528 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 [2021-06-04 21:46:00,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:00,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456697327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:00,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:00,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302172714] [2021-06-04 21:46:00,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:00,781 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) [2021-06-04 21:46:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:01,305 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-04 21:46:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:46:01,306 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 [2021-06-04 21:46:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:01,310 INFO L225 Difference]: With dead ends: 5291 [2021-06-04 21:46:01,310 INFO L226 Difference]: Without dead ends: 5021 [2021-06-04 21:46:01,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:46:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-04 21:46:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-04 21:46:01,343 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) [2021-06-04 21:46:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-04 21:46:01,347 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-04 21:46:01,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:01,347 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-04 21:46:01,347 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) [2021-06-04 21:46:01,347 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-04 21:46:01,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:01,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:01,350 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] [2021-06-04 21:46:01,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:01,551 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1421696131, now seen corresponding path program 251 times [2021-06-04 21:46:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:01,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976174739] [2021-06-04 21:46:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:01,808 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:01,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:01,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976174739] [2021-06-04 21:46:01,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976174739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:01,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365587248] [2021-06-04 21:46:01,808 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 [2021-06-04 21:46:01,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:01,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:01,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:02,047 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:02,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365587248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:02,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:02,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:02,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247717772] [2021-06-04 21:46:02,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:02,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:02,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:02,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:02,048 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) [2021-06-04 21:46:02,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:02,566 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-04 21:46:02,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:46:02,567 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 [2021-06-04 21:46:02,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:02,571 INFO L225 Difference]: With dead ends: 5321 [2021-06-04 21:46:02,571 INFO L226 Difference]: Without dead ends: 5051 [2021-06-04 21:46:02,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 616.3ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:46:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-04 21:46:02,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-04 21:46:02,603 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) [2021-06-04 21:46:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-04 21:46:02,607 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-04 21:46:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:02,607 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-04 21:46:02,607 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) [2021-06-04 21:46:02,607 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-04 21:46:02,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:02,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:02,610 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] [2021-06-04 21:46:02,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-04 21:46:02,810 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash -57147827, now seen corresponding path program 252 times [2021-06-04 21:46:02,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:02,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408942945] [2021-06-04 21:46:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:03,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408942945] [2021-06-04 21:46:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408942945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180823593] [2021-06-04 21:46:03,071 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 [2021-06-04 21:46:03,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:03,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:03,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:03,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180823593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:03,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:03,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:03,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704446131] [2021-06-04 21:46:03,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:03,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:03,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:03,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:03,343 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) [2021-06-04 21:46:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:03,929 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-04 21:46:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:46:03,929 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 [2021-06-04 21:46:03,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:03,934 INFO L225 Difference]: With dead ends: 5346 [2021-06-04 21:46:03,934 INFO L226 Difference]: Without dead ends: 5076 [2021-06-04 21:46:03,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 683.8ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-04 21:46:03,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-04 21:46:03,967 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) [2021-06-04 21:46:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-04 21:46:03,971 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-04 21:46:03,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:03,971 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-04 21:46:03,971 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) [2021-06-04 21:46:03,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-04 21:46:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:03,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:03,974 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] [2021-06-04 21:46:04,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:04,175 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:04,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:04,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1960587451, now seen corresponding path program 253 times [2021-06-04 21:46:04,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:04,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372400817] [2021-06-04 21:46:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:04,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372400817] [2021-06-04 21:46:04,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372400817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:04,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404089062] [2021-06-04 21:46:04,417 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 [2021-06-04 21:46:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:04,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:04,683 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:04,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404089062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:04,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:04,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:04,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149774392] [2021-06-04 21:46:04,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:04,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:04,684 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) [2021-06-04 21:46:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:05,228 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-04 21:46:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:46:05,229 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 [2021-06-04 21:46:05,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:05,234 INFO L225 Difference]: With dead ends: 5371 [2021-06-04 21:46:05,234 INFO L226 Difference]: Without dead ends: 5101 [2021-06-04 21:46:05,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:46:05,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-04 21:46:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-04 21:46:05,267 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) [2021-06-04 21:46:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-04 21:46:05,271 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-04 21:46:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:05,271 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-04 21:46:05,271 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) [2021-06-04 21:46:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-04 21:46:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:05,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:05,274 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] [2021-06-04 21:46:05,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:05,475 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:05,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1062064011, now seen corresponding path program 254 times [2021-06-04 21:46:05,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:05,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326597699] [2021-06-04 21:46:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:05,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326597699] [2021-06-04 21:46:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326597699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:05,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166496671] [2021-06-04 21:46:05,738 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 [2021-06-04 21:46:05,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:05,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:05,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:05,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:05,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166496671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:05,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:05,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:05,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391712779] [2021-06-04 21:46:05,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:05,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:05,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:05,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:05,990 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) [2021-06-04 21:46:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:06,637 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-04 21:46:06,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:46:06,638 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 [2021-06-04 21:46:06,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:06,643 INFO L225 Difference]: With dead ends: 5396 [2021-06-04 21:46:06,643 INFO L226 Difference]: Without dead ends: 5126 [2021-06-04 21:46:06,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:06,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-04 21:46:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-04 21:46:06,680 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) [2021-06-04 21:46:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-04 21:46:06,685 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-04 21:46:06,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:06,685 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-04 21:46:06,685 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) [2021-06-04 21:46:06,685 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-04 21:46:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:06,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:06,688 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] [2021-06-04 21:46:06,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:06,904 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -552889479, now seen corresponding path program 255 times [2021-06-04 21:46:06,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:06,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712020273] [2021-06-04 21:46:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:07,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:07,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712020273] [2021-06-04 21:46:07,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712020273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:07,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613663467] [2021-06-04 21:46:07,160 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 [2021-06-04 21:46:07,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:07,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:07,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-04 21:46:07,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:07,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613663467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:07,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:07,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:07,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171133292] [2021-06-04 21:46:07,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:07,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:07,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:07,418 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) [2021-06-04 21:46:08,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:08,018 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-04 21:46:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:46:08,018 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 [2021-06-04 21:46:08,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:08,023 INFO L225 Difference]: With dead ends: 5421 [2021-06-04 21:46:08,023 INFO L226 Difference]: Without dead ends: 5151 [2021-06-04 21:46:08,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:46:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-04 21:46:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-04 21:46:08,058 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) [2021-06-04 21:46:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-04 21:46:08,063 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-04 21:46:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:08,063 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-04 21:46:08,063 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) [2021-06-04 21:46:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-04 21:46:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:08,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:08,066 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] [2021-06-04 21:46:08,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:08,266 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:08,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash -933333431, now seen corresponding path program 256 times [2021-06-04 21:46:08,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:08,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557131204] [2021-06-04 21:46:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:08,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557131204] [2021-06-04 21:46:08,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557131204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297573421] [2021-06-04 21:46:08,493 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 [2021-06-04 21:46:08,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:08,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:08,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:08,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297573421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:08,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:08,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:08,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050927183] [2021-06-04 21:46:08,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:08,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:08,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:08,766 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) [2021-06-04 21:46:09,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:09,453 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-04 21:46:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:46:09,453 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 [2021-06-04 21:46:09,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:09,461 INFO L225 Difference]: With dead ends: 5446 [2021-06-04 21:46:09,462 INFO L226 Difference]: Without dead ends: 5176 [2021-06-04 21:46:09,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:09,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-04 21:46:09,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-04 21:46:09,515 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) [2021-06-04 21:46:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-04 21:46:09,519 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-04 21:46:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:09,519 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-04 21:46:09,519 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) [2021-06-04 21:46:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-04 21:46:09,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:09,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:09,522 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] [2021-06-04 21:46:09,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:09,723 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:09,723 INFO L82 PathProgramCache]: Analyzing trace with hash -308958281, now seen corresponding path program 257 times [2021-06-04 21:46:09,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:09,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671005466] [2021-06-04 21:46:09,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:09,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:09,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671005466] [2021-06-04 21:46:09,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671005466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:09,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589519387] [2021-06-04 21:46:09,958 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 [2021-06-04 21:46:10,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:10,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:10,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:10,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589519387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:10,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:10,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:10,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555868786] [2021-06-04 21:46:10,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:10,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:10,198 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) [2021-06-04 21:46:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:10,817 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-04 21:46:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:46:10,817 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 [2021-06-04 21:46:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:10,822 INFO L225 Difference]: With dead ends: 5471 [2021-06-04 21:46:10,823 INFO L226 Difference]: Without dead ends: 5201 [2021-06-04 21:46:10,823 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 666.8ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:46:10,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-04 21:46:10,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-04 21:46:10,859 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) [2021-06-04 21:46:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-04 21:46:10,864 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-04 21:46:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:10,864 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-04 21:46:10,864 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) [2021-06-04 21:46:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-04 21:46:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:10,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:10,867 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] [2021-06-04 21:46:11,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-04 21:46:11,068 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:11,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash 500093575, now seen corresponding path program 258 times [2021-06-04 21:46:11,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:11,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570542124] [2021-06-04 21:46:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:11,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:11,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570542124] [2021-06-04 21:46:11,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570542124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:11,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161782949] [2021-06-04 21:46:11,346 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 [2021-06-04 21:46:11,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:11,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:11,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161782949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:11,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:11,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:11,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060143959] [2021-06-04 21:46:11,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:11,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:11,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:11,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:11,604 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) [2021-06-04 21:46:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:12,423 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-04 21:46:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:46:12,423 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 [2021-06-04 21:46:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:12,429 INFO L225 Difference]: With dead ends: 5496 [2021-06-04 21:46:12,429 INFO L226 Difference]: Without dead ends: 5226 [2021-06-04 21:46:12,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:12,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-04 21:46:12,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-04 21:46:12,467 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) [2021-06-04 21:46:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-04 21:46:12,471 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-04 21:46:12,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:12,472 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-04 21:46:12,472 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) [2021-06-04 21:46:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-04 21:46:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:12,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:12,475 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] [2021-06-04 21:46:12,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:12,675 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:12,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:12,675 INFO L82 PathProgramCache]: Analyzing trace with hash -891856523, now seen corresponding path program 259 times [2021-06-04 21:46:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:12,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275235352] [2021-06-04 21:46:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:12,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:12,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275235352] [2021-06-04 21:46:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275235352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:12,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779909499] [2021-06-04 21:46:12,893 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 [2021-06-04 21:46:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:12,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:12,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:13,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779909499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:13,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:13,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:13,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315637856] [2021-06-04 21:46:13,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:13,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:13,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:13,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:13,118 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) [2021-06-04 21:46:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:13,827 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-04 21:46:13,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:46:13,828 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 [2021-06-04 21:46:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:13,833 INFO L225 Difference]: With dead ends: 5521 [2021-06-04 21:46:13,833 INFO L226 Difference]: Without dead ends: 5251 [2021-06-04 21:46:13,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:46:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-04 21:46:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-04 21:46:13,872 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) [2021-06-04 21:46:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-04 21:46:13,877 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-04 21:46:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:13,877 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-04 21:46:13,878 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) [2021-06-04 21:46:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-04 21:46:13,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:13,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:13,881 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] [2021-06-04 21:46:14,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-04 21:46:14,081 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:14,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:14,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1136933819, now seen corresponding path program 260 times [2021-06-04 21:46:14,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:14,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987070977] [2021-06-04 21:46:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:14,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:14,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987070977] [2021-06-04 21:46:14,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987070977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:14,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937608451] [2021-06-04 21:46:14,312 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 [2021-06-04 21:46:14,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:14,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937608451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:14,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:14,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:14,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574611507] [2021-06-04 21:46:14,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:14,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:14,579 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) [2021-06-04 21:46:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:15,387 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-04 21:46:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:46:15,388 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 [2021-06-04 21:46:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:15,393 INFO L225 Difference]: With dead ends: 5546 [2021-06-04 21:46:15,393 INFO L226 Difference]: Without dead ends: 5276 [2021-06-04 21:46:15,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 823.7ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-04 21:46:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-04 21:46:15,432 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) [2021-06-04 21:46:15,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-04 21:46:15,437 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-04 21:46:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:15,437 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-04 21:46:15,437 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) [2021-06-04 21:46:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-04 21:46:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:15,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:15,440 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] [2021-06-04 21:46:15,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-04 21:46:15,641 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1513784141, now seen corresponding path program 261 times [2021-06-04 21:46:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:15,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654851776] [2021-06-04 21:46:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:15,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:15,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654851776] [2021-06-04 21:46:15,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654851776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651572943] [2021-06-04 21:46:15,862 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 [2021-06-04 21:46:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:15,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:46:15,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:16,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651572943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:16,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:16,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:16,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547071056] [2021-06-04 21:46:16,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:16,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:16,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:16,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:16,106 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) [2021-06-04 21:46:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:16,825 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-04 21:46:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:46:16,825 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 [2021-06-04 21:46:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:16,830 INFO L225 Difference]: With dead ends: 5571 [2021-06-04 21:46:16,831 INFO L226 Difference]: Without dead ends: 5301 [2021-06-04 21:46:16,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:46:16,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-04 21:46:16,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-04 21:46:16,891 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) [2021-06-04 21:46:16,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-04 21:46:16,896 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-04 21:46:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:16,896 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-04 21:46:16,896 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) [2021-06-04 21:46:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-04 21:46:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:16,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:16,899 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] [2021-06-04 21:46:17,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:17,100 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash -187028605, now seen corresponding path program 262 times [2021-06-04 21:46:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:17,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255737391] [2021-06-04 21:46:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:17,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:17,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255737391] [2021-06-04 21:46:17,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255737391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:17,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592050051] [2021-06-04 21:46:17,314 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 [2021-06-04 21:46:17,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:17,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:17,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592050051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:17,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:17,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:17,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409903326] [2021-06-04 21:46:17,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:17,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:17,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:17,557 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) [2021-06-04 21:46:18,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:18,424 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-04 21:46:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:46:18,424 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 [2021-06-04 21:46:18,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:18,429 INFO L225 Difference]: With dead ends: 5596 [2021-06-04 21:46:18,429 INFO L226 Difference]: Without dead ends: 5326 [2021-06-04 21:46:18,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:18,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-04 21:46:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-04 21:46:18,469 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) [2021-06-04 21:46:18,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-04 21:46:18,475 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-04 21:46:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:18,475 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-04 21:46:18,475 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) [2021-06-04 21:46:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-04 21:46:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:18,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:18,479 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] [2021-06-04 21:46:18,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-04 21:46:18,679 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:18,679 INFO L82 PathProgramCache]: Analyzing trace with hash 267187569, now seen corresponding path program 263 times [2021-06-04 21:46:18,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:18,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034568212] [2021-06-04 21:46:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:18,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:18,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034568212] [2021-06-04 21:46:18,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034568212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:18,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357352473] [2021-06-04 21:46:18,898 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 [2021-06-04 21:46:18,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:18,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:19,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357352473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:19,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:19,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:19,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548911736] [2021-06-04 21:46:19,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:19,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:19,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:19,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:19,124 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) [2021-06-04 21:46:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:19,869 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-04 21:46:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:46:19,869 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 [2021-06-04 21:46:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:19,875 INFO L225 Difference]: With dead ends: 5621 [2021-06-04 21:46:19,875 INFO L226 Difference]: Without dead ends: 5351 [2021-06-04 21:46:19,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 754.2ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:46:19,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-04 21:46:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-04 21:46:19,914 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) [2021-06-04 21:46:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-04 21:46:19,919 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-04 21:46:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:19,919 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-04 21:46:19,919 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) [2021-06-04 21:46:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-04 21:46:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:19,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:19,923 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] [2021-06-04 21:46:20,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:20,123 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:20,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1266083905, now seen corresponding path program 264 times [2021-06-04 21:46:20,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:20,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35094764] [2021-06-04 21:46:20,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:20,339 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:20,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35094764] [2021-06-04 21:46:20,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35094764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:20,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771567119] [2021-06-04 21:46:20,339 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 [2021-06-04 21:46:20,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:20,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:20,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:46:20,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:20,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771567119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:20,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:20,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:20,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753607600] [2021-06-04 21:46:20,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:20,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:20,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:20,591 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) [2021-06-04 21:46:21,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:21,504 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-04 21:46:21,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:46:21,505 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 [2021-06-04 21:46:21,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:21,510 INFO L225 Difference]: With dead ends: 5646 [2021-06-04 21:46:21,510 INFO L226 Difference]: Without dead ends: 5376 [2021-06-04 21:46:21,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 891.3ms TimeCoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:46:21,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-04 21:46:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-04 21:46:21,552 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) [2021-06-04 21:46:21,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-04 21:46:21,557 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-04 21:46:21,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:21,557 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-04 21:46:21,557 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) [2021-06-04 21:46:21,557 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-04 21:46:21,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:21,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:21,560 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] [2021-06-04 21:46:21,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:21,761 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -613243985, now seen corresponding path program 265 times [2021-06-04 21:46:21,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:21,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028143195] [2021-06-04 21:46:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:22,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:22,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028143195] [2021-06-04 21:46:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028143195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:22,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114477275] [2021-06-04 21:46:22,017 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 [2021-06-04 21:46:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:22,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114477275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:22,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:22,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686315152] [2021-06-04 21:46:22,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:22,236 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) [2021-06-04 21:46:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:23,036 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-04 21:46:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:46:23,037 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 [2021-06-04 21:46:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:23,042 INFO L225 Difference]: With dead ends: 5671 [2021-06-04 21:46:23,042 INFO L226 Difference]: Without dead ends: 5401 [2021-06-04 21:46:23,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 803.8ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:46:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-04 21:46:23,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-04 21:46:23,086 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) [2021-06-04 21:46:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-04 21:46:23,092 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-04 21:46:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:23,092 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-04 21:46:23,092 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) [2021-06-04 21:46:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-04 21:46:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:23,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:23,095 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] [2021-06-04 21:46:23,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:23,296 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:23,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1417075327, now seen corresponding path program 266 times [2021-06-04 21:46:23,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:23,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406232214] [2021-06-04 21:46:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:23,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406232214] [2021-06-04 21:46:23,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406232214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:23,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96805810] [2021-06-04 21:46:23,516 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 [2021-06-04 21:46:23,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:23,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:23,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:23,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:23,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96805810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:23,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:23,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941646236] [2021-06-04 21:46:23,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:23,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:23,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:23,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:23,762 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) [2021-06-04 21:46:24,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:24,760 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-04 21:46:24,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:46:24,760 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 [2021-06-04 21:46:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:24,765 INFO L225 Difference]: With dead ends: 5696 [2021-06-04 21:46:24,765 INFO L226 Difference]: Without dead ends: 5426 [2021-06-04 21:46:24,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 973.8ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:46:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-04 21:46:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-04 21:46:24,809 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) [2021-06-04 21:46:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-04 21:46:24,815 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-04 21:46:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:24,815 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-04 21:46:24,815 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) [2021-06-04 21:46:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-04 21:46:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:24,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:24,818 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] [2021-06-04 21:46:25,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:25,019 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:25,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:25,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2031314797, now seen corresponding path program 267 times [2021-06-04 21:46:25,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:25,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112841562] [2021-06-04 21:46:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:25,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:25,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112841562] [2021-06-04 21:46:25,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112841562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:25,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974216875] [2021-06-04 21:46:25,247 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 [2021-06-04 21:46:25,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-04 21:46:25,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:46:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:25,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974216875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:25,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:25,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:25,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687030549] [2021-06-04 21:46:25,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:25,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:25,477 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) [2021-06-04 21:46:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:26,332 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-04 21:46:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:46:26,333 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 [2021-06-04 21:46:26,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:26,338 INFO L225 Difference]: With dead ends: 5766 [2021-06-04 21:46:26,338 INFO L226 Difference]: Without dead ends: 5496 [2021-06-04 21:46:26,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 829.1ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:46:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-04 21:46:26,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-04 21:46:26,385 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) [2021-06-04 21:46:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-04 21:46:26,392 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-04 21:46:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:26,392 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-04 21:46:26,392 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) [2021-06-04 21:46:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-04 21:46:26,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:26,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:26,396 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] [2021-06-04 21:46:26,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:26,596 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:26,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:26,596 INFO L82 PathProgramCache]: Analyzing trace with hash 316072509, now seen corresponding path program 268 times [2021-06-04 21:46:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:26,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006703190] [2021-06-04 21:46:26,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:26,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006703190] [2021-06-04 21:46:26,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006703190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:26,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100520901] [2021-06-04 21:46:26,839 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 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 [2021-06-04 21:46:26,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:26,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:26,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100520901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:27,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:27,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-04 21:46:27,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489326180] [2021-06-04 21:46:27,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:27,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:27,079 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) [2021-06-04 21:46:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:28,168 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-04 21:46:28,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:46:28,169 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 [2021-06-04 21:46:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:28,174 INFO L225 Difference]: With dead ends: 6344 [2021-06-04 21:46:28,174 INFO L226 Difference]: Without dead ends: 5721 [2021-06-04 21:46:28,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1065.1ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:46:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-04 21:46:28,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-04 21:46:28,215 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) [2021-06-04 21:46:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-04 21:46:28,221 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-04 21:46:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:28,221 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-04 21:46:28,221 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) [2021-06-04 21:46:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-04 21:46:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:28,224 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:28,224 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] [2021-06-04 21:46:28,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:28,425 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash -716575093, now seen corresponding path program 269 times [2021-06-04 21:46:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:28,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163828175] [2021-06-04 21:46:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:28,643 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:28,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:28,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163828175] [2021-06-04 21:46:28,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163828175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:28,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224000741] [2021-06-04 21:46:28,643 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 [2021-06-04 21:46:28,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-04 21:46:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:28,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-04 21:46:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:28,864 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:28,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224000741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:28,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:28,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:28,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068066057] [2021-06-04 21:46:28,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:28,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:28,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:28,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:28,865 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) [2021-06-04 21:46:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:29,753 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-04 21:46:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:46:29,753 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 [2021-06-04 21:46:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:29,758 INFO L225 Difference]: With dead ends: 6548 [2021-06-04 21:46:29,759 INFO L226 Difference]: Without dead ends: 6278 [2021-06-04 21:46:29,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 859.5ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:46:29,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-04 21:46:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-04 21:46:29,802 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) [2021-06-04 21:46:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-04 21:46:29,808 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-04 21:46:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:29,808 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-04 21:46:29,808 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) [2021-06-04 21:46:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-04 21:46:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-04 21:46:29,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:29,812 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] [2021-06-04 21:46:30,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-04 21:46:30,012 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:30,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:30,012 INFO L82 PathProgramCache]: Analyzing trace with hash -694231843, now seen corresponding path program 270 times [2021-06-04 21:46:30,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:30,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970456671] [2021-06-04 21:46:30,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:30,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970456671] [2021-06-04 21:46:30,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970456671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328256252] [2021-06-04 21:46:30,228 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 [2021-06-04 21:46:30,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-04 21:46:30,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:30,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:30,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328256252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:30,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:30,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-04 21:46:30,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024382132] [2021-06-04 21:46:30,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-04 21:46:30,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:30,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-04 21:46:30,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-04 21:46:30,463 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 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) [2021-06-04 21:46:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:31,447 INFO L93 Difference]: Finished difference Result 6010 states and 16421 transitions. [2021-06-04 21:46:31,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:46:31,447 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 [2021-06-04 21:46:31,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:31,453 INFO L225 Difference]: With dead ends: 6010 [2021-06-04 21:46:31,454 INFO L226 Difference]: Without dead ends: 5521 [2021-06-04 21:46:31,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 946.8ms TimeCoverageRelationStatistics Valid=1600, Invalid=4562, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:46:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5521 states. [2021-06-04 21:46:31,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5521 to 4828. [2021-06-04 21:46:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.834679925419515) internal successors, (13683), 4827 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13683 transitions. [2021-06-04 21:46:31,509 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13683 transitions. Word has length 145 [2021-06-04 21:46:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:31,509 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13683 transitions. [2021-06-04 21:46:31,509 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) [2021-06-04 21:46:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13683 transitions. [2021-06-04 21:46:31,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:31,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:31,513 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] [2021-06-04 21:46:31,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-04 21:46:31,713 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:31,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash 652101711, now seen corresponding path program 271 times [2021-06-04 21:46:31,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:31,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969550330] [2021-06-04 21:46:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:32,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969550330] [2021-06-04 21:46:32,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969550330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:32,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184838322] [2021-06-04 21:46:32,022 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 [2021-06-04 21:46:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:46:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:32,304 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:32,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184838322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:32,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:32,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 33 [2021-06-04 21:46:32,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041347335] [2021-06-04 21:46:32,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:46:32,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:32,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:46:32,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:46:32,305 INFO L87 Difference]: Start difference. First operand 4828 states and 13683 transitions. Second operand has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 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) [2021-06-04 21:46:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:32,886 INFO L93 Difference]: Finished difference Result 6068 states and 16483 transitions. [2021-06-04 21:46:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:46:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 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 150 [2021-06-04 21:46:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:32,892 INFO L225 Difference]: With dead ends: 6068 [2021-06-04 21:46:32,892 INFO L226 Difference]: Without dead ends: 5734 [2021-06-04 21:46:32,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 725.0ms TimeCoverageRelationStatistics Valid=1064, Invalid=2842, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:46:32,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2021-06-04 21:46:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4913. [2021-06-04 21:46:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.8202361563517915) internal successors, (13853), 4912 states have internal predecessors, (13853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13853 transitions. [2021-06-04 21:46:32,941 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13853 transitions. Word has length 150 [2021-06-04 21:46:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:32,941 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13853 transitions. [2021-06-04 21:46:32,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.454545454545454) internal successors, (180), 33 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) [2021-06-04 21:46:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13853 transitions. [2021-06-04 21:46:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:32,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:32,945 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] [2021-06-04 21:46:33,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-04 21:46:33,145 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:33,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:33,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1417310995, now seen corresponding path program 272 times [2021-06-04 21:46:33,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:33,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089372332] [2021-06-04 21:46:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:33,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:33,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089372332] [2021-06-04 21:46:33,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089372332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:33,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55404914] [2021-06-04 21:46:33,440 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 [2021-06-04 21:46:33,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:33,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55404914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:33,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:33,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325311079] [2021-06-04 21:46:33,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:33,697 INFO L87 Difference]: Start difference. First operand 4913 states and 13853 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) [2021-06-04 21:46:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:34,194 INFO L93 Difference]: Finished difference Result 7061 states and 18277 transitions. [2021-06-04 21:46:34,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-04 21:46:34,194 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 [2021-06-04 21:46:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:34,200 INFO L225 Difference]: With dead ends: 7061 [2021-06-04 21:46:34,200 INFO L226 Difference]: Without dead ends: 6791 [2021-06-04 21:46:34,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2021-06-04 21:46:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6791 states. [2021-06-04 21:46:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6791 to 4928. [2021-06-04 21:46:34,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:34,246 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:34,246 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:34,246 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) [2021-06-04 21:46:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:34,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:34,250 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] [2021-06-04 21:46:34,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-04 21:46:34,450 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1410972189, now seen corresponding path program 273 times [2021-06-04 21:46:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:34,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109329236] [2021-06-04 21:46:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:34,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109329236] [2021-06-04 21:46:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109329236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:34,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903638253] [2021-06-04 21:46:34,749 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 [2021-06-04 21:46:34,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:34,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:35,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903638253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:35,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:35,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:35,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700702502] [2021-06-04 21:46:35,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:35,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:35,023 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:35,623 INFO L93 Difference]: Finished difference Result 6946 states and 18047 transitions. [2021-06-04 21:46:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:46:35,624 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:35,631 INFO L225 Difference]: With dead ends: 6946 [2021-06-04 21:46:35,632 INFO L226 Difference]: Without dead ends: 6676 [2021-06-04 21:46:35,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 713.5ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:46:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-04 21:46:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4928. [2021-06-04 21:46:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:35,696 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:35,696 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:35,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:35,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:35,700 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] [2021-06-04 21:46:35,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:35,901 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:35,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1546193583, now seen corresponding path program 274 times [2021-06-04 21:46:35,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:35,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650847970] [2021-06-04 21:46:35,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:36,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:36,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650847970] [2021-06-04 21:46:36,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650847970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:36,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608765301] [2021-06-04 21:46:36,175 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 [2021-06-04 21:46:36,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:36,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:36,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608765301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:36,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:36,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:36,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522308108] [2021-06-04 21:46:36,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:36,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:36,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:36,422 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:36,997 INFO L93 Difference]: Finished difference Result 6921 states and 17997 transitions. [2021-06-04 21:46:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-04 21:46:36,997 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 [2021-06-04 21:46:36,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:37,005 INFO L225 Difference]: With dead ends: 6921 [2021-06-04 21:46:37,005 INFO L226 Difference]: Without dead ends: 6651 [2021-06-04 21:46:37,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=894, Invalid=2528, Unknown=0, NotChecked=0, Total=3422 [2021-06-04 21:46:37,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-04 21:46:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4928. [2021-06-04 21:46:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:37,061 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:37,061 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:37,061 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) [2021-06-04 21:46:37,061 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:37,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:37,065 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] [2021-06-04 21:46:37,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-04 21:46:37,265 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1872038945, now seen corresponding path program 275 times [2021-06-04 21:46:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899302329] [2021-06-04 21:46:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:37,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899302329] [2021-06-04 21:46:37,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899302329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:37,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383335233] [2021-06-04 21:46:37,554 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 [2021-06-04 21:46:37,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:37,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:37,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:37,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:37,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383335233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:37,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:37,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:37,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864957982] [2021-06-04 21:46:37,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:37,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:37,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:37,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:37,818 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:38,488 INFO L93 Difference]: Finished difference Result 6871 states and 17897 transitions. [2021-06-04 21:46:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:46:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:38,495 INFO L225 Difference]: With dead ends: 6871 [2021-06-04 21:46:38,495 INFO L226 Difference]: Without dead ends: 6601 [2021-06-04 21:46:38,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=979, Invalid=2927, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:46:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-04 21:46:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4928. [2021-06-04 21:46:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:38,551 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:38,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:38,551 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:38,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:38,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:38,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:38,556 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] [2021-06-04 21:46:38,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:38,756 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash 134712591, now seen corresponding path program 276 times [2021-06-04 21:46:38,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:38,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203866973] [2021-06-04 21:46:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:39,042 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:39,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203866973] [2021-06-04 21:46:39,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203866973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:39,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558919561] [2021-06-04 21:46:39,043 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 [2021-06-04 21:46:39,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:39,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:39,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:39,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558919561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:39,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:39,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263479255] [2021-06-04 21:46:39,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:39,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:39,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:39,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:39,294 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:39,866 INFO L93 Difference]: Finished difference Result 6821 states and 17797 transitions. [2021-06-04 21:46:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:46:39,867 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 [2021-06-04 21:46:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:39,873 INFO L225 Difference]: With dead ends: 6821 [2021-06-04 21:46:39,873 INFO L226 Difference]: Without dead ends: 6551 [2021-06-04 21:46:39,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=910, Invalid=2750, Unknown=0, NotChecked=0, Total=3660 [2021-06-04 21:46:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-04 21:46:39,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4928. [2021-06-04 21:46:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:39,925 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:39,925 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:39,926 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) [2021-06-04 21:46:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:39,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:39,929 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] [2021-06-04 21:46:40,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:40,130 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:40,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:40,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1499260895, now seen corresponding path program 277 times [2021-06-04 21:46:40,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:40,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414841856] [2021-06-04 21:46:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:40,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414841856] [2021-06-04 21:46:40,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414841856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:40,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642086697] [2021-06-04 21:46:40,402 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 [2021-06-04 21:46:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:40,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:40,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642086697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:40,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:40,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:40,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423025820] [2021-06-04 21:46:40,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:40,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:40,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:40,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:40,660 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:41,346 INFO L93 Difference]: Finished difference Result 6771 states and 17697 transitions. [2021-06-04 21:46:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:46:41,346 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:41,352 INFO L225 Difference]: With dead ends: 6771 [2021-06-04 21:46:41,352 INFO L226 Difference]: Without dead ends: 6501 [2021-06-04 21:46:41,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:46:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-04 21:46:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4928. [2021-06-04 21:46:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:41,401 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:41,401 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:41,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:41,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:41,405 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] [2021-06-04 21:46:41,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:41,605 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash -777971123, now seen corresponding path program 278 times [2021-06-04 21:46:41,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:41,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704030436] [2021-06-04 21:46:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:41,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:41,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704030436] [2021-06-04 21:46:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704030436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:41,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16023279] [2021-06-04 21:46:41,861 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 [2021-06-04 21:46:41,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:42,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16023279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:42,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:42,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:42,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288689474] [2021-06-04 21:46:42,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:42,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:42,104 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:42,742 INFO L93 Difference]: Finished difference Result 6721 states and 17597 transitions. [2021-06-04 21:46:42,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:46:42,742 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 [2021-06-04 21:46:42,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:42,748 INFO L225 Difference]: With dead ends: 6721 [2021-06-04 21:46:42,749 INFO L226 Difference]: Without dead ends: 6451 [2021-06-04 21:46:42,749 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 697.3ms TimeCoverageRelationStatistics Valid=942, Invalid=2964, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:46:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-04 21:46:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4928. [2021-06-04 21:46:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:42,800 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:42,800 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:42,800 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) [2021-06-04 21:46:42,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:42,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:42,803 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] [2021-06-04 21:46:43,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:43,004 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1676494563, now seen corresponding path program 279 times [2021-06-04 21:46:43,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:43,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127228729] [2021-06-04 21:46:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:43,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:43,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127228729] [2021-06-04 21:46:43,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127228729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:43,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404248689] [2021-06-04 21:46:43,264 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 [2021-06-04 21:46:43,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:43,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:43,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-04 21:46:43,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:43,534 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:43,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404248689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:43,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:43,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:43,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026856008] [2021-06-04 21:46:43,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:43,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:43,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:43,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:43,535 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:44,251 INFO L93 Difference]: Finished difference Result 6671 states and 17497 transitions. [2021-06-04 21:46:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:46:44,252 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:44,258 INFO L225 Difference]: With dead ends: 6671 [2021-06-04 21:46:44,258 INFO L226 Difference]: Without dead ends: 6401 [2021-06-04 21:46:44,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 764.6ms TimeCoverageRelationStatistics Valid=952, Invalid=3208, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:46:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-04 21:46:44,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 4928. [2021-06-04 21:46:44,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:44,308 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:44,308 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:44,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:44,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:44,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:44,312 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] [2021-06-04 21:46:44,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-04 21:46:44,513 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:44,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:44,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1003519243, now seen corresponding path program 280 times [2021-06-04 21:46:44,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:44,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654042244] [2021-06-04 21:46:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:44,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654042244] [2021-06-04 21:46:44,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654042244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:44,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545571142] [2021-06-04 21:46:44,778 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 [2021-06-04 21:46:44,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:45,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545571142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:45,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:45,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:45,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937630308] [2021-06-04 21:46:45,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:45,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:45,032 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:45,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:45,742 INFO L93 Difference]: Finished difference Result 6621 states and 17397 transitions. [2021-06-04 21:46:45,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:46:45,743 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 [2021-06-04 21:46:45,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:45,749 INFO L225 Difference]: With dead ends: 6621 [2021-06-04 21:46:45,750 INFO L226 Difference]: Without dead ends: 6351 [2021-06-04 21:46:45,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 717.1ms TimeCoverageRelationStatistics Valid=990, Invalid=3170, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:46:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-04 21:46:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 4928. [2021-06-04 21:46:45,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:45,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:45,799 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:45,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:45,799 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:45,799 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) [2021-06-04 21:46:45,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:45,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:45,803 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] [2021-06-04 21:46:46,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-04 21:46:46,003 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 623075291, now seen corresponding path program 281 times [2021-06-04 21:46:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:46,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956375458] [2021-06-04 21:46:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:46,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956375458] [2021-06-04 21:46:46,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956375458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:46,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456653372] [2021-06-04 21:46:46,286 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 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 [2021-06-04 21:46:46,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:46,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:46,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:46,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456653372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:46,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:46,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:46,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129866994] [2021-06-04 21:46:46,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:46,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:46,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:46,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:46,547 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:47,344 INFO L93 Difference]: Finished difference Result 6571 states and 17297 transitions. [2021-06-04 21:46:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:46:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:47,352 INFO L225 Difference]: With dead ends: 6571 [2021-06-04 21:46:47,352 INFO L226 Difference]: Without dead ends: 6301 [2021-06-04 21:46:47,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 858.5ms TimeCoverageRelationStatistics Valid=1099, Invalid=3593, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:46:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-04 21:46:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 4928. [2021-06-04 21:46:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:47,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:47,408 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:47,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:47,408 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:47,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:47,408 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:47,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:47,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:47,412 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] [2021-06-04 21:46:47,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-04 21:46:47,617 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:47,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:47,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1247450441, now seen corresponding path program 282 times [2021-06-04 21:46:47,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:47,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775227927] [2021-06-04 21:46:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:47,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:47,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775227927] [2021-06-04 21:46:47,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775227927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:47,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558647305] [2021-06-04 21:46:47,854 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 [2021-06-04 21:46:47,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:47,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:47,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:48,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558647305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:48,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:48,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:48,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027413780] [2021-06-04 21:46:48,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:48,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:48,104 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:48,800 INFO L93 Difference]: Finished difference Result 6521 states and 17197 transitions. [2021-06-04 21:46:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:46:48,801 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 [2021-06-04 21:46:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:48,806 INFO L225 Difference]: With dead ends: 6521 [2021-06-04 21:46:48,806 INFO L226 Difference]: Without dead ends: 6251 [2021-06-04 21:46:48,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=1054, Invalid=3368, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:46:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-04 21:46:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 4928. [2021-06-04 21:46:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:48,853 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:48,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:48,853 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:48,853 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) [2021-06-04 21:46:48,853 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:48,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:48,857 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] [2021-06-04 21:46:49,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:49,057 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:49,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:49,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2056502297, now seen corresponding path program 283 times [2021-06-04 21:46:49,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:49,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522273276] [2021-06-04 21:46:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:49,305 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:49,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522273276] [2021-06-04 21:46:49,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522273276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:49,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160303663] [2021-06-04 21:46:49,306 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 [2021-06-04 21:46:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:49,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:49,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160303663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:49,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:49,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:49,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055202927] [2021-06-04 21:46:49,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:49,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:49,557 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:50,385 INFO L93 Difference]: Finished difference Result 6471 states and 17097 transitions. [2021-06-04 21:46:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:46:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:50,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:50,392 INFO L225 Difference]: With dead ends: 6471 [2021-06-04 21:46:50,392 INFO L226 Difference]: Without dead ends: 6201 [2021-06-04 21:46:50,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=1171, Invalid=3799, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:46:50,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-04 21:46:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 4928. [2021-06-04 21:46:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:50,442 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:50,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:50,442 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:50,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:50,442 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:50,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:50,446 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] [2021-06-04 21:46:50,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:50,647 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash 664552199, now seen corresponding path program 284 times [2021-06-04 21:46:50,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:50,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486681995] [2021-06-04 21:46:50,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:50,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486681995] [2021-06-04 21:46:50,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486681995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:50,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247964318] [2021-06-04 21:46:50,891 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 [2021-06-04 21:46:50,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:46:50,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:50,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:51,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247964318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:51,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:51,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:51,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630641401] [2021-06-04 21:46:51,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:51,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:51,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:51,160 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:51,881 INFO L93 Difference]: Finished difference Result 6421 states and 16997 transitions. [2021-06-04 21:46:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:46:51,881 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 [2021-06-04 21:46:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:51,888 INFO L225 Difference]: With dead ends: 6421 [2021-06-04 21:46:51,888 INFO L226 Difference]: Without dead ends: 6151 [2021-06-04 21:46:51,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=1134, Invalid=3558, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:46:51,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-04 21:46:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 4928. [2021-06-04 21:46:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:51,941 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:51,941 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:51,941 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) [2021-06-04 21:46:51,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:51,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:51,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:51,945 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] [2021-06-04 21:46:52,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:52,145 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:52,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:52,145 INFO L82 PathProgramCache]: Analyzing trace with hash 419474903, now seen corresponding path program 285 times [2021-06-04 21:46:52,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:52,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664506348] [2021-06-04 21:46:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:52,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664506348] [2021-06-04 21:46:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664506348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731143801] [2021-06-04 21:46:52,385 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 [2021-06-04 21:46:52,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:46:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:52,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-04 21:46:52,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:52,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731143801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:52,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:52,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:52,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671747968] [2021-06-04 21:46:52,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:52,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:52,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:52,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:52,646 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:53,504 INFO L93 Difference]: Finished difference Result 6371 states and 16897 transitions. [2021-06-04 21:46:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:46:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:53,509 INFO L225 Difference]: With dead ends: 6371 [2021-06-04 21:46:53,509 INFO L226 Difference]: Without dead ends: 6101 [2021-06-04 21:46:53,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 872.3ms TimeCoverageRelationStatistics Valid=1114, Invalid=3856, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:46:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2021-06-04 21:46:53,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 4928. [2021-06-04 21:46:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:53,555 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:53,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:53,555 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:53,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:53,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:53,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:53,558 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] [2021-06-04 21:46:53,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:53,759 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 42624581, now seen corresponding path program 286 times [2021-06-04 21:46:53,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:53,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682228231] [2021-06-04 21:46:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:53,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682228231] [2021-06-04 21:46:53,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682228231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:53,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995042934] [2021-06-04 21:46:53,992 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 [2021-06-04 21:46:54,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:46:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995042934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:54,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:54,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:54,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289708936] [2021-06-04 21:46:54,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:54,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:54,229 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:55,002 INFO L93 Difference]: Finished difference Result 6321 states and 16797 transitions. [2021-06-04 21:46:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:46:55,002 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 [2021-06-04 21:46:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:55,009 INFO L225 Difference]: With dead ends: 6321 [2021-06-04 21:46:55,009 INFO L226 Difference]: Without dead ends: 6051 [2021-06-04 21:46:55,010 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 790.3ms TimeCoverageRelationStatistics Valid=1230, Invalid=3740, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:46:55,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-06-04 21:46:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4928. [2021-06-04 21:46:55,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:55,060 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:55,060 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:55,060 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) [2021-06-04 21:46:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:55,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:55,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:55,064 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] [2021-06-04 21:46:55,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:55,264 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:55,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1369380117, now seen corresponding path program 287 times [2021-06-04 21:46:55,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:55,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328239705] [2021-06-04 21:46:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:55,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328239705] [2021-06-04 21:46:55,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328239705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:55,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534390584] [2021-06-04 21:46:55,499 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 [2021-06-04 21:46:55,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:46:55,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:55,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:55,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:55,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534390584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:55,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:55,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:55,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723458656] [2021-06-04 21:46:55,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:55,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:55,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:55,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:55,752 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:56,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:56,761 INFO L93 Difference]: Finished difference Result 6271 states and 16697 transitions. [2021-06-04 21:46:56,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:46:56,761 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:46:56,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:56,767 INFO L225 Difference]: With dead ends: 6271 [2021-06-04 21:46:56,767 INFO L226 Difference]: Without dead ends: 6001 [2021-06-04 21:46:56,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1002.9ms TimeCoverageRelationStatistics Valid=1363, Invalid=4187, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:46:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6001 states. [2021-06-04 21:46:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6001 to 4928. [2021-06-04 21:46:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:56,816 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:56,816 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:56,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:56,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:56,820 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] [2021-06-04 21:46:57,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:57,021 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:57,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:57,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1823596291, now seen corresponding path program 288 times [2021-06-04 21:46:57,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:57,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995155755] [2021-06-04 21:46:57,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:57,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:57,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995155755] [2021-06-04 21:46:57,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995155755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:57,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152929991] [2021-06-04 21:46:57,245 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 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 [2021-06-04 21:46:57,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:46:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:46:57,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:46:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:57,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152929991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:57,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:57,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:46:57,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055959321] [2021-06-04 21:46:57,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:46:57,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:46:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:46:57,499 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:46:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:46:58,339 INFO L93 Difference]: Finished difference Result 6221 states and 16597 transitions. [2021-06-04 21:46:58,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:46:58,339 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 [2021-06-04 21:46:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:46:58,343 INFO L225 Difference]: With dead ends: 6221 [2021-06-04 21:46:58,343 INFO L226 Difference]: Without dead ends: 5951 [2021-06-04 21:46:58,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 823.4ms TimeCoverageRelationStatistics Valid=1342, Invalid=3914, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:46:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-06-04 21:46:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 4928. [2021-06-04 21:46:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:46:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:46:58,392 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:46:58,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:46:58,392 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:46:58,392 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) [2021-06-04 21:46:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:46:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:46:58,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:46:58,396 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] [2021-06-04 21:46:58,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:46:58,597 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:46:58,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:46:58,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1472474669, now seen corresponding path program 289 times [2021-06-04 21:46:58,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:46:58,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721757364] [2021-06-04 21:46:58,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:46:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:58,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:46:58,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721757364] [2021-06-04 21:46:58,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721757364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:58,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054603597] [2021-06-04 21:46:58,828 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 [2021-06-04 21:46:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:46:58,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:46:58,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:46:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:46:59,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054603597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:46:59,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:46:59,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:46:59,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159399976] [2021-06-04 21:46:59,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:46:59,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:46:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:46:59,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:46:59,080 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:00,106 INFO L93 Difference]: Finished difference Result 6171 states and 16497 transitions. [2021-06-04 21:47:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:47:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:47:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:00,112 INFO L225 Difference]: With dead ends: 6171 [2021-06-04 21:47:00,112 INFO L226 Difference]: Without dead ends: 5901 [2021-06-04 21:47:00,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1014.9ms TimeCoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-04 21:47:00,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4928. [2021-06-04 21:47:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:47:00,160 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:47:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:00,160 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:47:00,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:47:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:00,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:00,163 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] [2021-06-04 21:47:00,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:00,364 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:00,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:00,364 INFO L82 PathProgramCache]: Analyzing trace with hash 943164737, now seen corresponding path program 290 times [2021-06-04 21:47:00,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:00,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868906249] [2021-06-04 21:47:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:00,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:00,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868906249] [2021-06-04 21:47:00,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868906249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:00,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150591522] [2021-06-04 21:47:00,590 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 [2021-06-04 21:47:00,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:00,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150591522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:00,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:00,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069890896] [2021-06-04 21:47:00,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:00,838 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:47:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:01,683 INFO L93 Difference]: Finished difference Result 6121 states and 16397 transitions. [2021-06-04 21:47:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:47:01,684 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 [2021-06-04 21:47:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:01,689 INFO L225 Difference]: With dead ends: 6121 [2021-06-04 21:47:01,689 INFO L226 Difference]: Without dead ends: 5851 [2021-06-04 21:47:01,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 830.6ms TimeCoverageRelationStatistics Valid=1470, Invalid=4080, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:47:01,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-06-04 21:47:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 4928. [2021-06-04 21:47:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:47:01,738 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:47:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:01,738 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:47:01,738 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) [2021-06-04 21:47:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:47:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:01,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:01,742 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] [2021-06-04 21:47:01,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-04 21:47:01,942 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:01,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:01,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1321483247, now seen corresponding path program 291 times [2021-06-04 21:47:01,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:01,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214128003] [2021-06-04 21:47:01,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:01,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:02,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214128003] [2021-06-04 21:47:02,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214128003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:02,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083192928] [2021-06-04 21:47:02,172 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 [2021-06-04 21:47:02,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:02,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:02,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:47:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:02,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083192928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:02,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:02,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:47:02,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221756148] [2021-06-04 21:47:02,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:02,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:02,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:02,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:02,426 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:03,429 INFO L93 Difference]: Finished difference Result 6071 states and 16297 transitions. [2021-06-04 21:47:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:47:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:47:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:03,435 INFO L225 Difference]: With dead ends: 6071 [2021-06-04 21:47:03,435 INFO L226 Difference]: Without dead ends: 5801 [2021-06-04 21:47:03,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 978.2ms TimeCoverageRelationStatistics Valid=1393, Invalid=4459, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-04 21:47:03,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4928. [2021-06-04 21:47:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:47:03,482 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:47:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:03,483 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:47:03,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:47:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:03,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:03,486 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] [2021-06-04 21:47:03,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:03,687 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:03,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:03,687 INFO L82 PathProgramCache]: Analyzing trace with hash -707243777, now seen corresponding path program 292 times [2021-06-04 21:47:03,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:03,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620129304] [2021-06-04 21:47:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:03,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620129304] [2021-06-04 21:47:03,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620129304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:03,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110830807] [2021-06-04 21:47:03,915 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 [2021-06-04 21:47:03,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:03,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:03,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:03,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110830807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857258409] [2021-06-04 21:47:04,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:04,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:04,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:04,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:04,151 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 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) [2021-06-04 21:47:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:05,047 INFO L93 Difference]: Finished difference Result 6021 states and 16197 transitions. [2021-06-04 21:47:05,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:47:05,047 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 [2021-06-04 21:47:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:05,053 INFO L225 Difference]: With dead ends: 6021 [2021-06-04 21:47:05,053 INFO L226 Difference]: Without dead ends: 5751 [2021-06-04 21:47:05,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 880.3ms TimeCoverageRelationStatistics Valid=1614, Invalid=4238, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-04 21:47:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4928. [2021-06-04 21:47:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.817738989242947) internal successors, (13883), 4927 states have internal predecessors, (13883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13883 transitions. [2021-06-04 21:47:05,105 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13883 transitions. Word has length 150 [2021-06-04 21:47:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:05,105 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13883 transitions. [2021-06-04 21:47:05,106 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) [2021-06-04 21:47:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13883 transitions. [2021-06-04 21:47:05,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:05,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:05,109 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] [2021-06-04 21:47:05,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-04 21:47:05,310 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:05,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1872481231, now seen corresponding path program 293 times [2021-06-04 21:47:05,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:05,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519020754] [2021-06-04 21:47:05,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:05,560 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:05,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519020754] [2021-06-04 21:47:05,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519020754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:05,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305696178] [2021-06-04 21:47:05,560 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 [2021-06-04 21:47:05,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:05,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:05,833 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:05,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305696178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:05,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:05,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-04 21:47:05,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090580211] [2021-06-04 21:47:05,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:05,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:05,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:05,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:05,834 INFO L87 Difference]: Start difference. First operand 4928 states and 13883 transitions. Second operand has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:07,121 INFO L93 Difference]: Finished difference Result 6479 states and 17463 transitions. [2021-06-04 21:47:07,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:47:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:47:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:07,128 INFO L225 Difference]: With dead ends: 6479 [2021-06-04 21:47:07,128 INFO L226 Difference]: Without dead ends: 5856 [2021-06-04 21:47:07,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1258.6ms TimeCoverageRelationStatistics Valid=1794, Invalid=5012, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:47:07,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2021-06-04 21:47:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 4838. [2021-06-04 21:47:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8215836262145957) internal successors, (13648), 4837 states have internal predecessors, (13648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13648 transitions. [2021-06-04 21:47:07,192 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13648 transitions. Word has length 150 [2021-06-04 21:47:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:07,192 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13648 transitions. [2021-06-04 21:47:07,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.967741935483871) internal successors, (154), 31 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13648 transitions. [2021-06-04 21:47:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:07,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:07,196 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] [2021-06-04 21:47:07,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-04 21:47:07,397 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:07,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:07,397 INFO L82 PathProgramCache]: Analyzing trace with hash 839833629, now seen corresponding path program 294 times [2021-06-04 21:47:07,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:07,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524780724] [2021-06-04 21:47:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:07,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:07,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524780724] [2021-06-04 21:47:07,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524780724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:07,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233004963] [2021-06-04 21:47:07,627 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 [2021-06-04 21:47:07,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:07,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:07,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233004963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:07,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:07,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:07,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273686483] [2021-06-04 21:47:07,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:07,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:07,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:07,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:07,864 INFO L87 Difference]: Start difference. First operand 4838 states and 13648 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) [2021-06-04 21:47:08,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:08,797 INFO L93 Difference]: Finished difference Result 6708 states and 18181 transitions. [2021-06-04 21:47:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:47:08,798 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 [2021-06-04 21:47:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:08,804 INFO L225 Difference]: With dead ends: 6708 [2021-06-04 21:47:08,804 INFO L226 Difference]: Without dead ends: 6438 [2021-06-04 21:47:08,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 925.7ms TimeCoverageRelationStatistics Valid=1775, Invalid=4387, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:47:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-06-04 21:47:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5018. [2021-06-04 21:47:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5017 states have (on average 2.8317719752840342) internal successors, (14207), 5017 states have internal predecessors, (14207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 14207 transitions. [2021-06-04 21:47:08,857 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 14207 transitions. Word has length 150 [2021-06-04 21:47:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:08,857 INFO L482 AbstractCegarLoop]: Abstraction has 5018 states and 14207 transitions. [2021-06-04 21:47:08,857 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) [2021-06-04 21:47:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 14207 transitions. [2021-06-04 21:47:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-04 21:47:08,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:08,860 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] [2021-06-04 21:47:09,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-04 21:47:09,061 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:09,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:09,061 INFO L82 PathProgramCache]: Analyzing trace with hash 862176879, now seen corresponding path program 295 times [2021-06-04 21:47:09,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:09,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725370398] [2021-06-04 21:47:09,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:09,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:09,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725370398] [2021-06-04 21:47:09,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725370398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:09,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466811680] [2021-06-04 21:47:09,288 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 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 [2021-06-04 21:47:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-04 21:47:09,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466811680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:09,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:09,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-04 21:47:09,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628139826] [2021-06-04 21:47:09,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:09,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:09,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:09,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:09,511 INFO L87 Difference]: Start difference. First operand 5018 states and 14207 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) [2021-06-04 21:47:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:10,671 INFO L93 Difference]: Finished difference Result 6195 states and 16881 transitions. [2021-06-04 21:47:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:47:10,671 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 [2021-06-04 21:47:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:10,675 INFO L225 Difference]: With dead ends: 6195 [2021-06-04 21:47:10,675 INFO L226 Difference]: Without dead ends: 5706 [2021-06-04 21:47:10,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1105.9ms TimeCoverageRelationStatistics Valid=1911, Invalid=4731, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:47:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5706 states. [2021-06-04 21:47:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5706 to 3313. [2021-06-04 21:47:10,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.7409420289855073) internal successors, (9078), 3312 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9078 transitions. [2021-06-04 21:47:10,712 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9078 transitions. Word has length 150 [2021-06-04 21:47:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:10,712 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9078 transitions. [2021-06-04 21:47:10,712 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) [2021-06-04 21:47:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9078 transitions. [2021-06-04 21:47:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:10,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:10,715 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] [2021-06-04 21:47:10,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:10,915 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash -652298224, now seen corresponding path program 296 times [2021-06-04 21:47:10,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:10,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132570056] [2021-06-04 21:47:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:11,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132570056] [2021-06-04 21:47:11,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132570056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:11,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408606649] [2021-06-04 21:47:11,211 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 [2021-06-04 21:47:11,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:11,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408606649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:11,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:11,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:11,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797446161] [2021-06-04 21:47:11,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:11,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:11,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:11,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:11,450 INFO L87 Difference]: Start difference. First operand 3313 states and 9078 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) [2021-06-04 21:47:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:11,979 INFO L93 Difference]: Finished difference Result 4931 states and 12517 transitions. [2021-06-04 21:47:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:47:11,980 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 [2021-06-04 21:47:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:11,984 INFO L225 Difference]: With dead ends: 4931 [2021-06-04 21:47:11,984 INFO L226 Difference]: Without dead ends: 4661 [2021-06-04 21:47:11,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:47:11,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-04 21:47:12,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3388. [2021-06-04 21:47:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.746678476527901) internal successors, (9303), 3387 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:12,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9303 transitions. [2021-06-04 21:47:12,018 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9303 transitions. Word has length 155 [2021-06-04 21:47:12,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:12,018 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9303 transitions. [2021-06-04 21:47:12,018 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) [2021-06-04 21:47:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9303 transitions. [2021-06-04 21:47:12,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:12,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:12,021 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] [2021-06-04 21:47:12,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-04 21:47:12,221 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 814385888, now seen corresponding path program 297 times [2021-06-04 21:47:12,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:12,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141886995] [2021-06-04 21:47:12,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:12,526 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:12,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:12,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141886995] [2021-06-04 21:47:12,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141886995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:12,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121010941] [2021-06-04 21:47:12,526 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 [2021-06-04 21:47:12,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:12,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:12,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:12,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121010941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:12,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:12,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:12,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765135346] [2021-06-04 21:47:12,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:12,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:12,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:12,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:12,788 INFO L87 Difference]: Start difference. First operand 3388 states and 9303 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) [2021-06-04 21:47:13,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:13,409 INFO L93 Difference]: Finished difference Result 5551 states and 13832 transitions. [2021-06-04 21:47:13,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:13,410 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 [2021-06-04 21:47:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:13,415 INFO L225 Difference]: With dead ends: 5551 [2021-06-04 21:47:13,415 INFO L226 Difference]: Without dead ends: 5281 [2021-06-04 21:47:13,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 719.4ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:47:13,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5281 states. [2021-06-04 21:47:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5281 to 3463. [2021-06-04 21:47:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.752166377816291) internal successors, (9528), 3462 states have internal predecessors, (9528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9528 transitions. [2021-06-04 21:47:13,454 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9528 transitions. Word has length 155 [2021-06-04 21:47:13,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:13,454 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9528 transitions. [2021-06-04 21:47:13,454 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) [2021-06-04 21:47:13,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9528 transitions. [2021-06-04 21:47:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:13,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:13,457 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] [2021-06-04 21:47:13,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:13,657 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 679164494, now seen corresponding path program 298 times [2021-06-04 21:47:13,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:13,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993936996] [2021-06-04 21:47:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:13,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993936996] [2021-06-04 21:47:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993936996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:13,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274500873] [2021-06-04 21:47:13,949 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 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 [2021-06-04 21:47:14,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:14,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274500873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:14,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:14,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:14,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774672676] [2021-06-04 21:47:14,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:14,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:14,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:14,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:14,186 INFO L87 Difference]: Start difference. First operand 3463 states and 9528 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) [2021-06-04 21:47:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:14,756 INFO L93 Difference]: Finished difference Result 5581 states and 13967 transitions. [2021-06-04 21:47:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:47:14,756 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 [2021-06-04 21:47:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:14,761 INFO L225 Difference]: With dead ends: 5581 [2021-06-04 21:47:14,761 INFO L226 Difference]: Without dead ends: 5311 [2021-06-04 21:47:14,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 668.1ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-04 21:47:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5311 states. [2021-06-04 21:47:14,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5311 to 3538. [2021-06-04 21:47:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.757421543681086) internal successors, (9753), 3537 states have internal predecessors, (9753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:14,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9753 transitions. [2021-06-04 21:47:14,805 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9753 transitions. Word has length 155 [2021-06-04 21:47:14,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:14,805 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9753 transitions. [2021-06-04 21:47:14,805 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) [2021-06-04 21:47:14,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9753 transitions. [2021-06-04 21:47:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:14,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:14,808 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] [2021-06-04 21:47:15,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:15,008 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -197570274, now seen corresponding path program 299 times [2021-06-04 21:47:15,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:15,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179454734] [2021-06-04 21:47:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:15,308 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:15,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179454734] [2021-06-04 21:47:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179454734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051324311] [2021-06-04 21:47:15,308 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 [2021-06-04 21:47:15,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:15,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:15,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:15,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:15,602 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:15,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051324311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:15,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:15,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:15,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432513406] [2021-06-04 21:47:15,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:15,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:15,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:15,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:15,603 INFO L87 Difference]: Start difference. First operand 3538 states and 9753 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) [2021-06-04 21:47:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:16,240 INFO L93 Difference]: Finished difference Result 5606 states and 14092 transitions. [2021-06-04 21:47:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:47:16,241 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 [2021-06-04 21:47:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:16,246 INFO L225 Difference]: With dead ends: 5606 [2021-06-04 21:47:16,246 INFO L226 Difference]: Without dead ends: 5336 [2021-06-04 21:47:16,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 754.5ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:47:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-04 21:47:16,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 3613. [2021-06-04 21:47:16,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.762458471760797) internal successors, (9978), 3612 states have internal predecessors, (9978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9978 transitions. [2021-06-04 21:47:16,287 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9978 transitions. Word has length 155 [2021-06-04 21:47:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:16,287 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9978 transitions. [2021-06-04 21:47:16,287 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) [2021-06-04 21:47:16,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9978 transitions. [2021-06-04 21:47:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:16,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:16,290 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] [2021-06-04 21:47:16,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:16,490 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:16,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:16,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1934896628, now seen corresponding path program 300 times [2021-06-04 21:47:16,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:16,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303994837] [2021-06-04 21:47:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:16,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:16,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303994837] [2021-06-04 21:47:16,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303994837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:16,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608792492] [2021-06-04 21:47:16,756 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 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 [2021-06-04 21:47:16,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:16,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608792492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:17,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:17,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:17,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864366624] [2021-06-04 21:47:17,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:17,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:17,001 INFO L87 Difference]: Start difference. First operand 3613 states and 9978 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) [2021-06-04 21:47:17,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:17,605 INFO L93 Difference]: Finished difference Result 5631 states and 14217 transitions. [2021-06-04 21:47:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:47:17,605 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 [2021-06-04 21:47:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:17,610 INFO L225 Difference]: With dead ends: 5631 [2021-06-04 21:47:17,610 INFO L226 Difference]: Without dead ends: 5361 [2021-06-04 21:47:17,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-04 21:47:17,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-04 21:47:17,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 3688. [2021-06-04 21:47:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7672904800650935) internal successors, (10203), 3687 states have internal predecessors, (10203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10203 transitions. [2021-06-04 21:47:17,653 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10203 transitions. Word has length 155 [2021-06-04 21:47:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10203 transitions. [2021-06-04 21:47:17,653 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) [2021-06-04 21:47:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10203 transitions. [2021-06-04 21:47:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:17,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:17,656 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] [2021-06-04 21:47:17,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-04 21:47:17,856 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -570348324, now seen corresponding path program 301 times [2021-06-04 21:47:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:17,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588467081] [2021-06-04 21:47:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:18,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:18,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588467081] [2021-06-04 21:47:18,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588467081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:18,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759192303] [2021-06-04 21:47:18,172 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 [2021-06-04 21:47:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:18,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:18,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759192303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:18,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:18,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:18,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301891081] [2021-06-04 21:47:18,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:18,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:18,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:18,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:18,435 INFO L87 Difference]: Start difference. First operand 3688 states and 10203 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) [2021-06-04 21:47:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:19,128 INFO L93 Difference]: Finished difference Result 5656 states and 14342 transitions. [2021-06-04 21:47:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:47:19,128 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 [2021-06-04 21:47:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:19,133 INFO L225 Difference]: With dead ends: 5656 [2021-06-04 21:47:19,133 INFO L226 Difference]: Without dead ends: 5386 [2021-06-04 21:47:19,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 799.3ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:47:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5386 states. [2021-06-04 21:47:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5386 to 3763. [2021-06-04 21:47:19,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.7719298245614037) internal successors, (10428), 3762 states have internal predecessors, (10428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:19,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10428 transitions. [2021-06-04 21:47:19,173 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10428 transitions. Word has length 155 [2021-06-04 21:47:19,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:19,174 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10428 transitions. [2021-06-04 21:47:19,174 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) [2021-06-04 21:47:19,174 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10428 transitions. [2021-06-04 21:47:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:19,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:19,177 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] [2021-06-04 21:47:19,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-04 21:47:19,377 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1447386954, now seen corresponding path program 302 times [2021-06-04 21:47:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147316894] [2021-06-04 21:47:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:19,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:19,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147316894] [2021-06-04 21:47:19,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147316894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:19,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404945626] [2021-06-04 21:47:19,645 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 [2021-06-04 21:47:19,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:19,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:19,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:19,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:19,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404945626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:19,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:19,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:19,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400561381] [2021-06-04 21:47:19,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:19,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:19,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:19,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:19,882 INFO L87 Difference]: Start difference. First operand 3763 states and 10428 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) [2021-06-04 21:47:20,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:20,573 INFO L93 Difference]: Finished difference Result 5681 states and 14467 transitions. [2021-06-04 21:47:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:47:20,573 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 [2021-06-04 21:47:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:20,578 INFO L225 Difference]: With dead ends: 5681 [2021-06-04 21:47:20,578 INFO L226 Difference]: Without dead ends: 5411 [2021-06-04 21:47:20,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 734.8ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:47:20,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-04 21:47:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 3838. [2021-06-04 21:47:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.776387802971071) internal successors, (10653), 3837 states have internal predecessors, (10653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10653 transitions. [2021-06-04 21:47:20,618 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10653 transitions. Word has length 155 [2021-06-04 21:47:20,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:20,618 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10653 transitions. [2021-06-04 21:47:20,618 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) [2021-06-04 21:47:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10653 transitions. [2021-06-04 21:47:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:20,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:20,622 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] [2021-06-04 21:47:20,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-04 21:47:20,829 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:20,829 INFO L82 PathProgramCache]: Analyzing trace with hash 548863514, now seen corresponding path program 303 times [2021-06-04 21:47:20,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:20,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635444514] [2021-06-04 21:47:20,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:21,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635444514] [2021-06-04 21:47:21,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635444514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:21,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437718312] [2021-06-04 21:47:21,104 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 [2021-06-04 21:47:21,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-04 21:47:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:21,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437718312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:21,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:21,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:21,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168371600] [2021-06-04 21:47:21,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:21,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:21,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:21,355 INFO L87 Difference]: Start difference. First operand 3838 states and 10653 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) [2021-06-04 21:47:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:22,144 INFO L93 Difference]: Finished difference Result 5706 states and 14592 transitions. [2021-06-04 21:47:22,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:47:22,144 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 [2021-06-04 21:47:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:22,150 INFO L225 Difference]: With dead ends: 5706 [2021-06-04 21:47:22,150 INFO L226 Difference]: Without dead ends: 5436 [2021-06-04 21:47:22,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 837.2ms TimeCoverageRelationStatistics Valid=1072, Invalid=3620, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:47:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-04 21:47:22,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3913. [2021-06-04 21:47:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7806748466257667) internal successors, (10878), 3912 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10878 transitions. [2021-06-04 21:47:22,192 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10878 transitions. Word has length 155 [2021-06-04 21:47:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:22,192 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10878 transitions. [2021-06-04 21:47:22,192 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) [2021-06-04 21:47:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10878 transitions. [2021-06-04 21:47:22,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:22,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:22,195 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] [2021-06-04 21:47:22,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-04 21:47:22,395 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:22,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1066089976, now seen corresponding path program 304 times [2021-06-04 21:47:22,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:22,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122839862] [2021-06-04 21:47:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:22,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:22,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122839862] [2021-06-04 21:47:22,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122839862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:22,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460854815] [2021-06-04 21:47:22,653 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 [2021-06-04 21:47:22,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:22,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:22,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:22,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460854815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:22,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:22,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:22,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386138999] [2021-06-04 21:47:22,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:22,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:22,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:22,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:22,903 INFO L87 Difference]: Start difference. First operand 3913 states and 10878 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) [2021-06-04 21:47:23,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:23,584 INFO L93 Difference]: Finished difference Result 5731 states and 14717 transitions. [2021-06-04 21:47:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:47:23,585 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 [2021-06-04 21:47:23,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:23,590 INFO L225 Difference]: With dead ends: 5731 [2021-06-04 21:47:23,590 INFO L226 Difference]: Without dead ends: 5461 [2021-06-04 21:47:23,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 730.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:47:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5461 states. [2021-06-04 21:47:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5461 to 3988. [2021-06-04 21:47:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7848006019563583) internal successors, (11103), 3987 states have internal predecessors, (11103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11103 transitions. [2021-06-04 21:47:23,632 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11103 transitions. Word has length 155 [2021-06-04 21:47:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:23,632 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11103 transitions. [2021-06-04 21:47:23,632 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) [2021-06-04 21:47:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11103 transitions. [2021-06-04 21:47:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:23,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:23,635 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] [2021-06-04 21:47:23,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-04 21:47:23,836 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:23,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:23,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1446533928, now seen corresponding path program 305 times [2021-06-04 21:47:23,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:23,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582328922] [2021-06-04 21:47:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:23,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:24,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582328922] [2021-06-04 21:47:24,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582328922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211494401] [2021-06-04 21:47:24,118 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 [2021-06-04 21:47:24,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:24,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:24,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211494401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:24,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:24,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:24,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814565175] [2021-06-04 21:47:24,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:24,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:24,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:24,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:24,394 INFO L87 Difference]: Start difference. First operand 3988 states and 11103 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) [2021-06-04 21:47:25,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:25,235 INFO L93 Difference]: Finished difference Result 5756 states and 14842 transitions. [2021-06-04 21:47:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:47:25,235 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 [2021-06-04 21:47:25,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:25,240 INFO L225 Difference]: With dead ends: 5756 [2021-06-04 21:47:25,240 INFO L226 Difference]: Without dead ends: 5486 [2021-06-04 21:47:25,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 886.3ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:47:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-04 21:47:25,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 4063. [2021-06-04 21:47:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.78877400295421) internal successors, (11328), 4062 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11328 transitions. [2021-06-04 21:47:25,300 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11328 transitions. Word has length 155 [2021-06-04 21:47:25,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:25,301 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11328 transitions. [2021-06-04 21:47:25,301 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) [2021-06-04 21:47:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11328 transitions. [2021-06-04 21:47:25,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:25,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:25,304 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] [2021-06-04 21:47:25,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-04 21:47:25,504 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:25,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:25,505 INFO L82 PathProgramCache]: Analyzing trace with hash -822158778, now seen corresponding path program 306 times [2021-06-04 21:47:25,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:25,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349908270] [2021-06-04 21:47:25,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:25,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:25,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349908270] [2021-06-04 21:47:25,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349908270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:25,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976973462] [2021-06-04 21:47:25,757 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 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 [2021-06-04 21:47:25,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:25,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:25,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:26,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976973462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:26,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:26,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:26,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36211405] [2021-06-04 21:47:26,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:26,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:26,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:26,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:26,003 INFO L87 Difference]: Start difference. First operand 4063 states and 11328 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) [2021-06-04 21:47:26,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:26,786 INFO L93 Difference]: Finished difference Result 5781 states and 14967 transitions. [2021-06-04 21:47:26,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:47:26,787 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 [2021-06-04 21:47:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:26,792 INFO L225 Difference]: With dead ends: 5781 [2021-06-04 21:47:26,792 INFO L226 Difference]: Without dead ends: 5511 [2021-06-04 21:47:26,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 777.8ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:47:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-04 21:47:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 4138. [2021-06-04 21:47:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.792603335750544) internal successors, (11553), 4137 states have internal predecessors, (11553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11553 transitions. [2021-06-04 21:47:26,836 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11553 transitions. Word has length 155 [2021-06-04 21:47:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:26,836 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11553 transitions. [2021-06-04 21:47:26,836 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) [2021-06-04 21:47:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11553 transitions. [2021-06-04 21:47:26,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:26,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:26,839 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] [2021-06-04 21:47:27,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-04 21:47:27,040 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:27,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:27,040 INFO L82 PathProgramCache]: Analyzing trace with hash -13106922, now seen corresponding path program 307 times [2021-06-04 21:47:27,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:27,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567254947] [2021-06-04 21:47:27,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:27,297 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:27,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567254947] [2021-06-04 21:47:27,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567254947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:27,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066893890] [2021-06-04 21:47:27,297 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 [2021-06-04 21:47:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:27,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066893890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:27,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:27,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:27,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403060406] [2021-06-04 21:47:27,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:27,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:27,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:27,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:27,545 INFO L87 Difference]: Start difference. First operand 4138 states and 11553 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) [2021-06-04 21:47:28,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:28,486 INFO L93 Difference]: Finished difference Result 5806 states and 15092 transitions. [2021-06-04 21:47:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:47:28,487 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 [2021-06-04 21:47:28,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:28,492 INFO L225 Difference]: With dead ends: 5806 [2021-06-04 21:47:28,492 INFO L226 Difference]: Without dead ends: 5536 [2021-06-04 21:47:28,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:47:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-04 21:47:28,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 4213. [2021-06-04 21:47:28,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7962962962962963) internal successors, (11778), 4212 states have internal predecessors, (11778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:28,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11778 transitions. [2021-06-04 21:47:28,542 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11778 transitions. Word has length 155 [2021-06-04 21:47:28,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:28,543 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11778 transitions. [2021-06-04 21:47:28,543 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) [2021-06-04 21:47:28,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11778 transitions. [2021-06-04 21:47:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:28,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:28,546 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] [2021-06-04 21:47:28,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:28,746 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1405057020, now seen corresponding path program 308 times [2021-06-04 21:47:28,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:28,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211628710] [2021-06-04 21:47:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:28,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211628710] [2021-06-04 21:47:28,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211628710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:28,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352003518] [2021-06-04 21:47:28,993 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 [2021-06-04 21:47:29,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:29,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:29,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:29,215 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352003518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:29,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:29,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:29,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042733565] [2021-06-04 21:47:29,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:29,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:29,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:29,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:29,216 INFO L87 Difference]: Start difference. First operand 4213 states and 11778 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) [2021-06-04 21:47:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:29,987 INFO L93 Difference]: Finished difference Result 5831 states and 15217 transitions. [2021-06-04 21:47:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:47:29,988 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 [2021-06-04 21:47:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:29,993 INFO L225 Difference]: With dead ends: 5831 [2021-06-04 21:47:29,993 INFO L226 Difference]: Without dead ends: 5561 [2021-06-04 21:47:29,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 775.9ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:47:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-04 21:47:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 4288. [2021-06-04 21:47:30,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.7998600419874036) internal successors, (12003), 4287 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:30,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 12003 transitions. [2021-06-04 21:47:30,039 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 12003 transitions. Word has length 155 [2021-06-04 21:47:30,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:30,039 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 12003 transitions. [2021-06-04 21:47:30,039 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) [2021-06-04 21:47:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 12003 transitions. [2021-06-04 21:47:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:30,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:30,043 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] [2021-06-04 21:47:30,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-04 21:47:30,243 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:30,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1650134316, now seen corresponding path program 309 times [2021-06-04 21:47:30,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:30,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116450271] [2021-06-04 21:47:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:30,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:30,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116450271] [2021-06-04 21:47:30,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116450271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:30,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936880036] [2021-06-04 21:47:30,524 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 [2021-06-04 21:47:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:30,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-04 21:47:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936880036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:30,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:30,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:30,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997798645] [2021-06-04 21:47:30,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:30,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:30,781 INFO L87 Difference]: Start difference. First operand 4288 states and 12003 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) [2021-06-04 21:47:31,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:31,728 INFO L93 Difference]: Finished difference Result 5856 states and 15342 transitions. [2021-06-04 21:47:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:47:31,728 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 [2021-06-04 21:47:31,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:31,733 INFO L225 Difference]: With dead ends: 5856 [2021-06-04 21:47:31,733 INFO L226 Difference]: Without dead ends: 5586 [2021-06-04 21:47:31,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 917.8ms TimeCoverageRelationStatistics Valid=1267, Invalid=4283, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:47:31,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-04 21:47:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 4363. [2021-06-04 21:47:31,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.8033012379642366) internal successors, (12228), 4362 states have internal predecessors, (12228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12228 transitions. [2021-06-04 21:47:31,778 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12228 transitions. Word has length 155 [2021-06-04 21:47:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:31,778 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12228 transitions. [2021-06-04 21:47:31,778 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) [2021-06-04 21:47:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12228 transitions. [2021-06-04 21:47:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:31,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:31,782 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] [2021-06-04 21:47:31,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:31,982 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:31,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2026984638, now seen corresponding path program 310 times [2021-06-04 21:47:31,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:31,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549111925] [2021-06-04 21:47:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:32,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549111925] [2021-06-04 21:47:32,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549111925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263412098] [2021-06-04 21:47:32,226 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 [2021-06-04 21:47:32,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:32,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263412098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:32,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:32,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100875566] [2021-06-04 21:47:32,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:32,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:32,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:32,460 INFO L87 Difference]: Start difference. First operand 4363 states and 12228 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) [2021-06-04 21:47:33,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:33,361 INFO L93 Difference]: Finished difference Result 5881 states and 15467 transitions. [2021-06-04 21:47:33,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:47:33,362 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 [2021-06-04 21:47:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:33,367 INFO L225 Difference]: With dead ends: 5881 [2021-06-04 21:47:33,367 INFO L226 Difference]: Without dead ends: 5611 [2021-06-04 21:47:33,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:47:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-04 21:47:33,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 4438. [2021-06-04 21:47:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.8066260987153484) internal successors, (12453), 4437 states have internal predecessors, (12453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12453 transitions. [2021-06-04 21:47:33,414 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12453 transitions. Word has length 155 [2021-06-04 21:47:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:33,415 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12453 transitions. [2021-06-04 21:47:33,415 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) [2021-06-04 21:47:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12453 transitions. [2021-06-04 21:47:33,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:33,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:33,418 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] [2021-06-04 21:47:33,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-04 21:47:33,619 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:33,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:33,619 INFO L82 PathProgramCache]: Analyzing trace with hash -700229102, now seen corresponding path program 311 times [2021-06-04 21:47:33,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:33,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603385836] [2021-06-04 21:47:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:33,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:33,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603385836] [2021-06-04 21:47:33,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603385836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:33,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559875351] [2021-06-04 21:47:33,866 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 [2021-06-04 21:47:33,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:33,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:33,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:33,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:34,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559875351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:34,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:34,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:34,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887686411] [2021-06-04 21:47:34,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:34,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:34,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:34,106 INFO L87 Difference]: Start difference. First operand 4438 states and 12453 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) [2021-06-04 21:47:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:35,128 INFO L93 Difference]: Finished difference Result 5906 states and 15592 transitions. [2021-06-04 21:47:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:47:35,129 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 [2021-06-04 21:47:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:35,134 INFO L225 Difference]: With dead ends: 5906 [2021-06-04 21:47:35,134 INFO L226 Difference]: Without dead ends: 5636 [2021-06-04 21:47:35,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 984.4ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:35,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-04 21:47:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4513. [2021-06-04 21:47:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.809840425531915) internal successors, (12678), 4512 states have internal predecessors, (12678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12678 transitions. [2021-06-04 21:47:35,198 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12678 transitions. Word has length 155 [2021-06-04 21:47:35,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:35,198 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12678 transitions. [2021-06-04 21:47:35,198 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) [2021-06-04 21:47:35,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12678 transitions. [2021-06-04 21:47:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:35,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:35,202 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] [2021-06-04 21:47:35,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:35,402 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:35,403 INFO L82 PathProgramCache]: Analyzing trace with hash -246012928, now seen corresponding path program 312 times [2021-06-04 21:47:35,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:35,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514732411] [2021-06-04 21:47:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:35,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:35,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514732411] [2021-06-04 21:47:35,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514732411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:35,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288678671] [2021-06-04 21:47:35,651 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 [2021-06-04 21:47:35,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:35,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:35,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:47:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:35,882 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:35,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288678671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:35,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:35,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:35,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487849189] [2021-06-04 21:47:35,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:35,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:35,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:35,883 INFO L87 Difference]: Start difference. First operand 4513 states and 12678 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) [2021-06-04 21:47:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:36,753 INFO L93 Difference]: Finished difference Result 5931 states and 15717 transitions. [2021-06-04 21:47:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:47:36,753 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 [2021-06-04 21:47:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:36,759 INFO L225 Difference]: With dead ends: 5931 [2021-06-04 21:47:36,759 INFO L226 Difference]: Without dead ends: 5661 [2021-06-04 21:47:36,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 845.0ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:47:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-04 21:47:36,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4588. [2021-06-04 21:47:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.8129496402877696) internal successors, (12903), 4587 states have internal predecessors, (12903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:36,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12903 transitions. [2021-06-04 21:47:36,814 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12903 transitions. Word has length 155 [2021-06-04 21:47:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:36,814 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12903 transitions. [2021-06-04 21:47:36,814 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) [2021-06-04 21:47:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12903 transitions. [2021-06-04 21:47:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:36,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:36,818 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] [2021-06-04 21:47:37,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:37,018 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash 752883408, now seen corresponding path program 313 times [2021-06-04 21:47:37,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:37,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246351330] [2021-06-04 21:47:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:37,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:37,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246351330] [2021-06-04 21:47:37,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246351330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:37,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998458491] [2021-06-04 21:47:37,299 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 [2021-06-04 21:47:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:37,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:37,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998458491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:37,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:37,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107882587] [2021-06-04 21:47:37,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:37,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:37,539 INFO L87 Difference]: Start difference. First operand 4588 states and 12903 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) [2021-06-04 21:47:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:38,666 INFO L93 Difference]: Finished difference Result 5956 states and 15842 transitions. [2021-06-04 21:47:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:47:38,666 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 [2021-06-04 21:47:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:38,673 INFO L225 Difference]: With dead ends: 5956 [2021-06-04 21:47:38,673 INFO L226 Difference]: Without dead ends: 5686 [2021-06-04 21:47:38,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1092.5ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:47:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-04 21:47:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4663. [2021-06-04 21:47:38,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.815958815958816) internal successors, (13128), 4662 states have internal predecessors, (13128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:38,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13128 transitions. [2021-06-04 21:47:38,726 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13128 transitions. Word has length 155 [2021-06-04 21:47:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:38,726 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13128 transitions. [2021-06-04 21:47:38,726 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) [2021-06-04 21:47:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13128 transitions. [2021-06-04 21:47:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:38,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:38,729 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] [2021-06-04 21:47:38,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-04 21:47:38,930 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1126444482, now seen corresponding path program 314 times [2021-06-04 21:47:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900087698] [2021-06-04 21:47:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:39,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:39,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900087698] [2021-06-04 21:47:39,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900087698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:39,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018550608] [2021-06-04 21:47:39,200 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 [2021-06-04 21:47:39,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:39,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:39,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:39,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018550608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:39,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:39,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615417934] [2021-06-04 21:47:39,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:39,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:39,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:39,424 INFO L87 Difference]: Start difference. First operand 4663 states and 13128 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) [2021-06-04 21:47:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:40,345 INFO L93 Difference]: Finished difference Result 5981 states and 15967 transitions. [2021-06-04 21:47:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:47:40,346 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 [2021-06-04 21:47:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:40,350 INFO L225 Difference]: With dead ends: 5981 [2021-06-04 21:47:40,350 INFO L226 Difference]: Without dead ends: 5711 [2021-06-04 21:47:40,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 915.2ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:47:40,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-04 21:47:40,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4738. [2021-06-04 21:47:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.818872704243192) internal successors, (13353), 4737 states have internal predecessors, (13353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:40,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13353 transitions. [2021-06-04 21:47:40,399 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13353 transitions. Word has length 155 [2021-06-04 21:47:40,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:40,400 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13353 transitions. [2021-06-04 21:47:40,400 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) [2021-06-04 21:47:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13353 transitions. [2021-06-04 21:47:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:40,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:40,403 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] [2021-06-04 21:47:40,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-04 21:47:40,604 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash 903874830, now seen corresponding path program 315 times [2021-06-04 21:47:40,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:40,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746103154] [2021-06-04 21:47:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:40,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:40,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746103154] [2021-06-04 21:47:40,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746103154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:40,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915495432] [2021-06-04 21:47:40,851 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 [2021-06-04 21:47:40,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-04 21:47:40,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:40,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:47:40,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:41,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915495432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:41,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:41,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025144778] [2021-06-04 21:47:41,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:41,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:41,103 INFO L87 Difference]: Start difference. First operand 4738 states and 13353 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) [2021-06-04 21:47:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:42,175 INFO L93 Difference]: Finished difference Result 6006 states and 16092 transitions. [2021-06-04 21:47:42,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:47:42,176 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 [2021-06-04 21:47:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:42,181 INFO L225 Difference]: With dead ends: 6006 [2021-06-04 21:47:42,182 INFO L226 Difference]: Without dead ends: 5736 [2021-06-04 21:47:42,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1043.2ms TimeCoverageRelationStatistics Valid=1579, Invalid=4901, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:47:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-04 21:47:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4813. [2021-06-04 21:47:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.821695760598504) internal successors, (13578), 4812 states have internal predecessors, (13578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:42,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13578 transitions. [2021-06-04 21:47:42,234 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13578 transitions. Word has length 155 [2021-06-04 21:47:42,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:42,234 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13578 transitions. [2021-06-04 21:47:42,234 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) [2021-06-04 21:47:42,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13578 transitions. [2021-06-04 21:47:42,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:42,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:42,238 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] [2021-06-04 21:47:42,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-04 21:47:42,438 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:42,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:42,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1518114300, now seen corresponding path program 316 times [2021-06-04 21:47:42,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:42,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330181197] [2021-06-04 21:47:42,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:42,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:42,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330181197] [2021-06-04 21:47:42,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330181197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:42,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063991225] [2021-06-04 21:47:42,703 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 [2021-06-04 21:47:42,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:42,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:42,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063991225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:42,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:42,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:42,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88996262] [2021-06-04 21:47:42,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:42,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:42,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:42,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:42,925 INFO L87 Difference]: Start difference. First operand 4813 states and 13578 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) [2021-06-04 21:47:43,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:43,857 INFO L93 Difference]: Finished difference Result 6031 states and 16217 transitions. [2021-06-04 21:47:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:47:43,857 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 [2021-06-04 21:47:43,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:43,863 INFO L225 Difference]: With dead ends: 6031 [2021-06-04 21:47:43,863 INFO L226 Difference]: Without dead ends: 5761 [2021-06-04 21:47:43,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 940.8ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:47:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-04 21:47:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4888. [2021-06-04 21:47:43,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.824432166973603) internal successors, (13803), 4887 states have internal predecessors, (13803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13803 transitions. [2021-06-04 21:47:43,917 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13803 transitions. Word has length 155 [2021-06-04 21:47:43,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:43,917 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13803 transitions. [2021-06-04 21:47:43,917 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) [2021-06-04 21:47:43,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13803 transitions. [2021-06-04 21:47:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:43,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:43,921 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] [2021-06-04 21:47:44,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-04 21:47:44,121 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:44,122 INFO L82 PathProgramCache]: Analyzing trace with hash -197127988, now seen corresponding path program 317 times [2021-06-04 21:47:44,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:44,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343770964] [2021-06-04 21:47:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:44,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:44,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343770964] [2021-06-04 21:47:44,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343770964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:44,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63732337] [2021-06-04 21:47:44,366 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 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 [2021-06-04 21:47:44,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-04 21:47:44,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:44,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:44,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:44,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63732337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:44,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:44,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:44,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104384097] [2021-06-04 21:47:44,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:44,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:44,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:44,607 INFO L87 Difference]: Start difference. First operand 4888 states and 13803 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) [2021-06-04 21:47:45,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:45,764 INFO L93 Difference]: Finished difference Result 6116 states and 16507 transitions. [2021-06-04 21:47:45,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:47:45,764 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 [2021-06-04 21:47:45,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:45,770 INFO L225 Difference]: With dead ends: 6116 [2021-06-04 21:47:45,770 INFO L226 Difference]: Without dead ends: 5846 [2021-06-04 21:47:45,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1115.3ms TimeCoverageRelationStatistics Valid=1877, Invalid=4929, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:47:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5846 states. [2021-06-04 21:47:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5846 to 4963. [2021-06-04 21:47:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.8311164852881903) internal successors, (14048), 4962 states have internal predecessors, (14048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 14048 transitions. [2021-06-04 21:47:45,822 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 14048 transitions. Word has length 155 [2021-06-04 21:47:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:45,822 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 14048 transitions. [2021-06-04 21:47:45,822 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) [2021-06-04 21:47:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 14048 transitions. [2021-06-04 21:47:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:45,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:45,826 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] [2021-06-04 21:47:46,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:46,026 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1229775590, now seen corresponding path program 318 times [2021-06-04 21:47:46,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:46,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362647464] [2021-06-04 21:47:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:46,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:46,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362647464] [2021-06-04 21:47:46,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362647464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:46,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004262529] [2021-06-04 21:47:46,278 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 [2021-06-04 21:47:46,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-04 21:47:46,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:46,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:46,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:46,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004262529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:46,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:46,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-04 21:47:46,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908401827] [2021-06-04 21:47:46,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-04 21:47:46,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-04 21:47:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-04 21:47:46,507 INFO L87 Difference]: Start difference. First operand 4963 states and 14048 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) [2021-06-04 21:47:47,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:47,495 INFO L93 Difference]: Finished difference Result 6858 states and 18631 transitions. [2021-06-04 21:47:47,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:47:47,495 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 [2021-06-04 21:47:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:47,500 INFO L225 Difference]: With dead ends: 6858 [2021-06-04 21:47:47,500 INFO L226 Difference]: Without dead ends: 6588 [2021-06-04 21:47:47,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 953.9ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:47:47,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6588 states. [2021-06-04 21:47:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6588 to 5143. [2021-06-04 21:47:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5143 states, 5142 states have (on average 2.8407234539089847) internal successors, (14607), 5142 states have internal predecessors, (14607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5143 states to 5143 states and 14607 transitions. [2021-06-04 21:47:47,549 INFO L78 Accepts]: Start accepts. Automaton has 5143 states and 14607 transitions. Word has length 155 [2021-06-04 21:47:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 5143 states and 14607 transitions. [2021-06-04 21:47:47,549 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) [2021-06-04 21:47:47,550 INFO L276 IsEmpty]: Start isEmpty. Operand 5143 states and 14607 transitions. [2021-06-04 21:47:47,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-04 21:47:47,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:47,553 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] [2021-06-04 21:47:47,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-04 21:47:47,754 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1207432340, now seen corresponding path program 319 times [2021-06-04 21:47:47,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:47,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483057024] [2021-06-04 21:47:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:47,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:47,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483057024] [2021-06-04 21:47:47,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483057024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:47,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061384940] [2021-06-04 21:47:47,998 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 [2021-06-04 21:47:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:48,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-04 21:47:48,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061384940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:48,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-04 21:47:48,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622489446] [2021-06-04 21:47:48,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:48,234 INFO L87 Difference]: Start difference. First operand 5143 states and 14607 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) [2021-06-04 21:47:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:49,398 INFO L93 Difference]: Finished difference Result 6320 states and 17281 transitions. [2021-06-04 21:47:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:47:49,398 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 [2021-06-04 21:47:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:49,403 INFO L225 Difference]: With dead ends: 6320 [2021-06-04 21:47:49,403 INFO L226 Difference]: Without dead ends: 5831 [2021-06-04 21:47:49,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1138.1ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:47:49,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2021-06-04 21:47:49,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 3234. [2021-06-04 21:47:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3234 states, 3233 states have (on average 2.74234457160532) internal successors, (8866), 3233 states have internal predecessors, (8866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3234 states to 3234 states and 8866 transitions. [2021-06-04 21:47:49,440 INFO L78 Accepts]: Start accepts. Automaton has 3234 states and 8866 transitions. Word has length 155 [2021-06-04 21:47:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 3234 states and 8866 transitions. [2021-06-04 21:47:49,441 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) [2021-06-04 21:47:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3234 states and 8866 transitions. [2021-06-04 21:47:49,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:49,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:49,443 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] [2021-06-04 21:47:49,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:49,643 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:49,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:49,643 INFO L82 PathProgramCache]: Analyzing trace with hash -998997856, now seen corresponding path program 320 times [2021-06-04 21:47:49,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:49,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555299503] [2021-06-04 21:47:49,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:49,971 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:49,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:49,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555299503] [2021-06-04 21:47:49,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555299503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:49,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078312] [2021-06-04 21:47:49,972 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 [2021-06-04 21:47:50,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:50,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:50,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:47:50,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:50,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:50,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:50,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-04 21:47:50,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209082511] [2021-06-04 21:47:50,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:47:50,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:50,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:47:50,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:47:50,267 INFO L87 Difference]: Start difference. First operand 3234 states and 8866 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) [2021-06-04 21:47:50,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:50,910 INFO L93 Difference]: Finished difference Result 4524 states and 11766 transitions. [2021-06-04 21:47:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:50,910 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 [2021-06-04 21:47:50,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:50,915 INFO L225 Difference]: With dead ends: 4524 [2021-06-04 21:47:50,915 INFO L226 Difference]: Without dead ends: 4190 [2021-06-04 21:47:50,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 797.1ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:47:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4190 states. [2021-06-04 21:47:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4190 to 3319. [2021-06-04 21:47:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 2.7233273056057867) internal successors, (9036), 3318 states have internal predecessors, (9036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:47:50,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 9036 transitions. [2021-06-04 21:47:50,946 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 9036 transitions. Word has length 160 [2021-06-04 21:47:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:50,946 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 9036 transitions. [2021-06-04 21:47:50,946 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) [2021-06-04 21:47:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 9036 transitions. [2021-06-04 21:47:50,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:50,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:50,948 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] [2021-06-04 21:47:51,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-04 21:47:51,149 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:51,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:51,149 INFO L82 PathProgramCache]: Analyzing trace with hash 595396196, now seen corresponding path program 321 times [2021-06-04 21:47:51,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:51,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272452873] [2021-06-04 21:47:51,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:51,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:51,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272452873] [2021-06-04 21:47:51,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272452873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:51,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709219082] [2021-06-04 21:47:51,469 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 [2021-06-04 21:47:51,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:47:51,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:51,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709219082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:51,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:51,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:47:51,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769907655] [2021-06-04 21:47:51,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:51,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:51,724 INFO L87 Difference]: Start difference. First operand 3319 states and 9036 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) [2021-06-04 21:47:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:52,250 INFO L93 Difference]: Finished difference Result 5746 states and 14147 transitions. [2021-06-04 21:47:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-04 21:47:52,251 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 [2021-06-04 21:47:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:52,256 INFO L225 Difference]: With dead ends: 5746 [2021-06-04 21:47:52,256 INFO L226 Difference]: Without dead ends: 5476 [2021-06-04 21:47:52,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 676.7ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-04 21:47:52,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-04 21:47:52,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3463. [2021-06-04 21:47:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7305025996533794) internal successors, (9453), 3462 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) [2021-06-04 21:47:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9453 transitions. [2021-06-04 21:47:52,312 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9453 transitions. Word has length 160 [2021-06-04 21:47:52,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:52,312 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9453 transitions. [2021-06-04 21:47:52,312 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) [2021-06-04 21:47:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9453 transitions. [2021-06-04 21:47:52,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:52,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:52,315 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] [2021-06-04 21:47:52,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:52,516 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:52,516 INFO L82 PathProgramCache]: Analyzing trace with hash 94082356, now seen corresponding path program 322 times [2021-06-04 21:47:52,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:52,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784038198] [2021-06-04 21:47:52,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:52,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784038198] [2021-06-04 21:47:52,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784038198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:52,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140051859] [2021-06-04 21:47:52,852 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 [2021-06-04 21:47:52,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:47:52,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:52,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:52,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:53,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140051859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:53,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:53,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:47:53,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149323571] [2021-06-04 21:47:53,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:47:53,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:47:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:47:53,119 INFO L87 Difference]: Start difference. First operand 3463 states and 9453 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) [2021-06-04 21:47:53,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:53,717 INFO L93 Difference]: Finished difference Result 5706 states and 14142 transitions. [2021-06-04 21:47:53,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:47:53,718 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 [2021-06-04 21:47:53,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:53,723 INFO L225 Difference]: With dead ends: 5706 [2021-06-04 21:47:53,723 INFO L226 Difference]: Without dead ends: 5436 [2021-06-04 21:47:53,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 750.9ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:47:53,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5436 states. [2021-06-04 21:47:53,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5436 to 3538. [2021-06-04 21:47:53,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.736217133163698) internal successors, (9678), 3537 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) [2021-06-04 21:47:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9678 transitions. [2021-06-04 21:47:53,761 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9678 transitions. Word has length 160 [2021-06-04 21:47:53,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:53,761 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9678 transitions. [2021-06-04 21:47:53,761 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) [2021-06-04 21:47:53,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9678 transitions. [2021-06-04 21:47:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:53,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:53,764 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] [2021-06-04 21:47:53,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-04 21:47:53,964 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:53,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 570577698, now seen corresponding path program 323 times [2021-06-04 21:47:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:53,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798784639] [2021-06-04 21:47:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:54,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:54,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798784639] [2021-06-04 21:47:54,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798784639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:54,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833208608] [2021-06-04 21:47:54,276 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 [2021-06-04 21:47:54,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:47:54,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:54,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:54,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833208608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:54,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:54,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:47:54,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949100260] [2021-06-04 21:47:54,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:54,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:54,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:54,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:54,520 INFO L87 Difference]: Start difference. First operand 3538 states and 9678 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) [2021-06-04 21:47:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:55,087 INFO L93 Difference]: Finished difference Result 5756 states and 14317 transitions. [2021-06-04 21:47:55,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-04 21:47:55,087 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 [2021-06-04 21:47:55,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:55,092 INFO L225 Difference]: With dead ends: 5756 [2021-06-04 21:47:55,092 INFO L226 Difference]: Without dead ends: 5486 [2021-06-04 21:47:55,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-04 21:47:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5486 states. [2021-06-04 21:47:55,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5486 to 3613. [2021-06-04 21:47:55,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.7416943521594686) internal successors, (9903), 3612 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) [2021-06-04 21:47:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 9903 transitions. [2021-06-04 21:47:55,127 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 9903 transitions. Word has length 160 [2021-06-04 21:47:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:55,128 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 9903 transitions. [2021-06-04 21:47:55,128 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) [2021-06-04 21:47:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 9903 transitions. [2021-06-04 21:47:55,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:55,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:55,131 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] [2021-06-04 21:47:55,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-04 21:47:55,331 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2037261810, now seen corresponding path program 324 times [2021-06-04 21:47:55,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:55,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278452351] [2021-06-04 21:47:55,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:55,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:55,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278452351] [2021-06-04 21:47:55,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278452351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:55,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408858371] [2021-06-04 21:47:55,652 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 [2021-06-04 21:47:55,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:47:55,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:55,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408858371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:55,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:55,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:47:55,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248153776] [2021-06-04 21:47:55,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:47:55,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:55,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:47:55,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:47:55,930 INFO L87 Difference]: Start difference. First operand 3613 states and 9903 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) [2021-06-04 21:47:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:56,635 INFO L93 Difference]: Finished difference Result 5781 states and 14442 transitions. [2021-06-04 21:47:56,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:47:56,636 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 [2021-06-04 21:47:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:56,641 INFO L225 Difference]: With dead ends: 5781 [2021-06-04 21:47:56,641 INFO L226 Difference]: Without dead ends: 5511 [2021-06-04 21:47:56,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 799.7ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:47:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-06-04 21:47:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3688. [2021-06-04 21:47:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.7469487388120424) internal successors, (10128), 3687 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) [2021-06-04 21:47:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10128 transitions. [2021-06-04 21:47:56,681 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10128 transitions. Word has length 160 [2021-06-04 21:47:56,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:56,681 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10128 transitions. [2021-06-04 21:47:56,681 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) [2021-06-04 21:47:56,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10128 transitions. [2021-06-04 21:47:56,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:56,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:56,684 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] [2021-06-04 21:47:56,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:47:56,885 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1902040416, now seen corresponding path program 325 times [2021-06-04 21:47:56,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:56,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051827611] [2021-06-04 21:47:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051827611] [2021-06-04 21:47:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051827611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918149669] [2021-06-04 21:47:57,178 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 [2021-06-04 21:47:57,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:57,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:57,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:57,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918149669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:57,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:57,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:47:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807551942] [2021-06-04 21:47:57,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:47:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:57,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:47:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:47:57,441 INFO L87 Difference]: Start difference. First operand 3688 states and 10128 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) [2021-06-04 21:47:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:58,041 INFO L93 Difference]: Finished difference Result 5806 states and 14567 transitions. [2021-06-04 21:47:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:47:58,041 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 [2021-06-04 21:47:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:58,046 INFO L225 Difference]: With dead ends: 5806 [2021-06-04 21:47:58,046 INFO L226 Difference]: Without dead ends: 5536 [2021-06-04 21:47:58,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 707.7ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:47:58,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5536 states. [2021-06-04 21:47:58,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5536 to 3763. [2021-06-04 21:47:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.751993620414673) internal successors, (10353), 3762 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) [2021-06-04 21:47:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10353 transitions. [2021-06-04 21:47:58,085 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10353 transitions. Word has length 160 [2021-06-04 21:47:58,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:58,085 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10353 transitions. [2021-06-04 21:47:58,085 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) [2021-06-04 21:47:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10353 transitions. [2021-06-04 21:47:58,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:58,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:58,088 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] [2021-06-04 21:47:58,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-04 21:47:58,289 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1025305648, now seen corresponding path program 326 times [2021-06-04 21:47:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200104971] [2021-06-04 21:47:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:47:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:58,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:47:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200104971] [2021-06-04 21:47:58,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200104971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682158054] [2021-06-04 21:47:58,614 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 [2021-06-04 21:47:58,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:47:58,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:47:58,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:47:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:47:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:47:58,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682158054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:47:58,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:47:58,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:47:58,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309486077] [2021-06-04 21:47:58,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:47:58,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:47:58,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:47:58,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:47:58,875 INFO L87 Difference]: Start difference. First operand 3763 states and 10353 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) [2021-06-04 21:47:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:47:59,639 INFO L93 Difference]: Finished difference Result 5831 states and 14692 transitions. [2021-06-04 21:47:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:47:59,640 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 [2021-06-04 21:47:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:47:59,644 INFO L225 Difference]: With dead ends: 5831 [2021-06-04 21:47:59,644 INFO L226 Difference]: Without dead ends: 5561 [2021-06-04 21:47:59,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 857.4ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:47:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5561 states. [2021-06-04 21:47:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5561 to 3838. [2021-06-04 21:47:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.7568412822517594) internal successors, (10578), 3837 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) [2021-06-04 21:47:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10578 transitions. [2021-06-04 21:47:59,681 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10578 transitions. Word has length 160 [2021-06-04 21:47:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:47:59,681 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10578 transitions. [2021-06-04 21:47:59,681 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) [2021-06-04 21:47:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10578 transitions. [2021-06-04 21:47:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:47:59,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:47:59,684 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] [2021-06-04 21:47:59,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-04 21:47:59,884 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:47:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:47:59,884 INFO L82 PathProgramCache]: Analyzing trace with hash -712020706, now seen corresponding path program 327 times [2021-06-04 21:47:59,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:47:59,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562955993] [2021-06-04 21:47:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:47:59,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:00,170 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:00,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:00,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562955993] [2021-06-04 21:48:00,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562955993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:00,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069585569] [2021-06-04 21:48:00,170 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 [2021-06-04 21:48:00,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:00,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-04 21:48:00,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:00,412 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:00,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069585569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:00,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:00,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:00,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067001526] [2021-06-04 21:48:00,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:00,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:00,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:00,413 INFO L87 Difference]: Start difference. First operand 3838 states and 10578 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) [2021-06-04 21:48:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:01,093 INFO L93 Difference]: Finished difference Result 5856 states and 14817 transitions. [2021-06-04 21:48:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:48:01,094 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 [2021-06-04 21:48:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:01,099 INFO L225 Difference]: With dead ends: 5856 [2021-06-04 21:48:01,099 INFO L226 Difference]: Without dead ends: 5586 [2021-06-04 21:48:01,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 732.1ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:48:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5586 states. [2021-06-04 21:48:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5586 to 3913. [2021-06-04 21:48:01,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.7615030674846626) internal successors, (10803), 3912 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) [2021-06-04 21:48:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10803 transitions. [2021-06-04 21:48:01,141 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10803 transitions. Word has length 160 [2021-06-04 21:48:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:01,141 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10803 transitions. [2021-06-04 21:48:01,141 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) [2021-06-04 21:48:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10803 transitions. [2021-06-04 21:48:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:01,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:01,144 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] [2021-06-04 21:48:01,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-04 21:48:01,344 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 652527598, now seen corresponding path program 328 times [2021-06-04 21:48:01,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:01,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167019803] [2021-06-04 21:48:01,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:01,643 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:01,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167019803] [2021-06-04 21:48:01,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167019803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129440343] [2021-06-04 21:48:01,643 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 [2021-06-04 21:48:01,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:01,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:01,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:01,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:01,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129440343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:01,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:01,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:01,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213693188] [2021-06-04 21:48:01,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:01,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:01,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:01,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:01,898 INFO L87 Difference]: Start difference. First operand 3913 states and 10803 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) [2021-06-04 21:48:02,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:02,725 INFO L93 Difference]: Finished difference Result 5881 states and 14942 transitions. [2021-06-04 21:48:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:48:02,725 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 [2021-06-04 21:48:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:02,731 INFO L225 Difference]: With dead ends: 5881 [2021-06-04 21:48:02,731 INFO L226 Difference]: Without dead ends: 5611 [2021-06-04 21:48:02,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 882.3ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:48:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2021-06-04 21:48:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 3988. [2021-06-04 21:48:02,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3987 states have (on average 2.7659894657637323) internal successors, (11028), 3987 states have internal predecessors, (11028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11028 transitions. [2021-06-04 21:48:02,776 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11028 transitions. Word has length 160 [2021-06-04 21:48:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:02,776 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11028 transitions. [2021-06-04 21:48:02,776 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) [2021-06-04 21:48:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11028 transitions. [2021-06-04 21:48:02,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:02,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:02,779 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] [2021-06-04 21:48:02,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-04 21:48:02,980 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:02,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1624704420, now seen corresponding path program 329 times [2021-06-04 21:48:02,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:02,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997222632] [2021-06-04 21:48:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:03,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997222632] [2021-06-04 21:48:03,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997222632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:03,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339850495] [2021-06-04 21:48:03,259 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 [2021-06-04 21:48:03,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:03,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:03,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:03,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:03,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339850495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:03,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:03,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:03,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334001878] [2021-06-04 21:48:03,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:03,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:03,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:03,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:03,500 INFO L87 Difference]: Start difference. First operand 3988 states and 11028 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) [2021-06-04 21:48:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:04,181 INFO L93 Difference]: Finished difference Result 5906 states and 15067 transitions. [2021-06-04 21:48:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:48:04,182 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 [2021-06-04 21:48:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:04,187 INFO L225 Difference]: With dead ends: 5906 [2021-06-04 21:48:04,187 INFO L226 Difference]: Without dead ends: 5636 [2021-06-04 21:48:04,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 757.3ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:48:04,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5636 states. [2021-06-04 21:48:04,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5636 to 4063. [2021-06-04 21:48:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4063 states, 4062 states have (on average 2.7703101920236337) internal successors, (11253), 4062 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11253 transitions. [2021-06-04 21:48:04,232 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11253 transitions. Word has length 160 [2021-06-04 21:48:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:04,232 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11253 transitions. [2021-06-04 21:48:04,232 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) [2021-06-04 21:48:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11253 transitions. [2021-06-04 21:48:04,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:04,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:04,235 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] [2021-06-04 21:48:04,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-04 21:48:04,436 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1771739436, now seen corresponding path program 330 times [2021-06-04 21:48:04,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:04,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926547583] [2021-06-04 21:48:04,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:04,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:04,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926547583] [2021-06-04 21:48:04,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926547583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:04,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330705731] [2021-06-04 21:48:04,742 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 [2021-06-04 21:48:04,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:04,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:05,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330705731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:05,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:05,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:05,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232605387] [2021-06-04 21:48:05,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:05,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:05,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:05,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:05,012 INFO L87 Difference]: Start difference. First operand 4063 states and 11253 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) [2021-06-04 21:48:05,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:05,901 INFO L93 Difference]: Finished difference Result 5931 states and 15192 transitions. [2021-06-04 21:48:05,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:48:05,902 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 [2021-06-04 21:48:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:05,907 INFO L225 Difference]: With dead ends: 5931 [2021-06-04 21:48:05,907 INFO L226 Difference]: Without dead ends: 5661 [2021-06-04 21:48:05,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 918.4ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:48:05,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-04 21:48:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4138. [2021-06-04 21:48:05,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.774474256707759) internal successors, (11478), 4137 states have internal predecessors, (11478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11478 transitions. [2021-06-04 21:48:05,951 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11478 transitions. Word has length 160 [2021-06-04 21:48:05,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:05,952 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11478 transitions. [2021-06-04 21:48:05,952 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) [2021-06-04 21:48:05,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11478 transitions. [2021-06-04 21:48:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:05,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:05,955 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] [2021-06-04 21:48:06,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:06,156 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:06,156 INFO L82 PathProgramCache]: Analyzing trace with hash 156785946, now seen corresponding path program 331 times [2021-06-04 21:48:06,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:06,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835417116] [2021-06-04 21:48:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:06,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:06,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835417116] [2021-06-04 21:48:06,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835417116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:06,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140098032] [2021-06-04 21:48:06,450 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 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 [2021-06-04 21:48:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:06,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:06,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140098032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:06,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:06,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:06,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275518949] [2021-06-04 21:48:06,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:06,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:06,689 INFO L87 Difference]: Start difference. First operand 4138 states and 11478 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) [2021-06-04 21:48:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:07,498 INFO L93 Difference]: Finished difference Result 5956 states and 15317 transitions. [2021-06-04 21:48:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:48:07,498 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 [2021-06-04 21:48:07,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:07,504 INFO L225 Difference]: With dead ends: 5956 [2021-06-04 21:48:07,504 INFO L226 Difference]: Without dead ends: 5686 [2021-06-04 21:48:07,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 820.3ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:48:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-04 21:48:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 4213. [2021-06-04 21:48:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.7784900284900287) internal successors, (11703), 4212 states have internal predecessors, (11703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11703 transitions. [2021-06-04 21:48:07,552 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11703 transitions. Word has length 160 [2021-06-04 21:48:07,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:07,552 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11703 transitions. [2021-06-04 21:48:07,552 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) [2021-06-04 21:48:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11703 transitions. [2021-06-04 21:48:07,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:07,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:07,555 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] [2021-06-04 21:48:07,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:07,756 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:07,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:07,756 INFO L82 PathProgramCache]: Analyzing trace with hash -223658006, now seen corresponding path program 332 times [2021-06-04 21:48:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:07,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045193612] [2021-06-04 21:48:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:08,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045193612] [2021-06-04 21:48:08,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045193612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:08,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628572135] [2021-06-04 21:48:08,052 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 [2021-06-04 21:48:08,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:08,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:08,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:08,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628572135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:08,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:08,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:08,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434238072] [2021-06-04 21:48:08,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:08,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:08,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:08,309 INFO L87 Difference]: Start difference. First operand 4213 states and 11703 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) [2021-06-04 21:48:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:09,254 INFO L93 Difference]: Finished difference Result 5981 states and 15442 transitions. [2021-06-04 21:48:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:48:09,255 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 [2021-06-04 21:48:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:09,260 INFO L225 Difference]: With dead ends: 5981 [2021-06-04 21:48:09,260 INFO L226 Difference]: Without dead ends: 5711 [2021-06-04 21:48:09,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:48:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-04 21:48:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4288. [2021-06-04 21:48:09,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4288 states, 4287 states have (on average 2.782365290412876) internal successors, (11928), 4287 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4288 states to 4288 states and 11928 transitions. [2021-06-04 21:48:09,319 INFO L78 Accepts]: Start accepts. Automaton has 4288 states and 11928 transitions. Word has length 160 [2021-06-04 21:48:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:09,319 INFO L482 AbstractCegarLoop]: Abstraction has 4288 states and 11928 transitions. [2021-06-04 21:48:09,320 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) [2021-06-04 21:48:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 4288 states and 11928 transitions. [2021-06-04 21:48:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:09,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:09,323 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] [2021-06-04 21:48:09,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:09,524 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:09,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:09,524 INFO L82 PathProgramCache]: Analyzing trace with hash 400717144, now seen corresponding path program 333 times [2021-06-04 21:48:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:09,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791155071] [2021-06-04 21:48:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:09,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791155071] [2021-06-04 21:48:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791155071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309749255] [2021-06-04 21:48:09,789 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 [2021-06-04 21:48:09,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-04 21:48:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:10,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309749255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:10,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:10,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:10,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254148614] [2021-06-04 21:48:10,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:10,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:10,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:10,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:10,028 INFO L87 Difference]: Start difference. First operand 4288 states and 11928 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) [2021-06-04 21:48:10,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:10,824 INFO L93 Difference]: Finished difference Result 6006 states and 15567 transitions. [2021-06-04 21:48:10,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:48:10,824 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 [2021-06-04 21:48:10,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:10,830 INFO L225 Difference]: With dead ends: 6006 [2021-06-04 21:48:10,830 INFO L226 Difference]: Without dead ends: 5736 [2021-06-04 21:48:10,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 809.0ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:48:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-04 21:48:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 4363. [2021-06-04 21:48:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 4362 states have (on average 2.7861072902338377) internal successors, (12153), 4362 states have internal predecessors, (12153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 12153 transitions. [2021-06-04 21:48:10,875 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 12153 transitions. Word has length 160 [2021-06-04 21:48:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:10,875 INFO L482 AbstractCegarLoop]: Abstraction has 4363 states and 12153 transitions. [2021-06-04 21:48:10,875 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) [2021-06-04 21:48:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 12153 transitions. [2021-06-04 21:48:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:10,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:10,879 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] [2021-06-04 21:48:11,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:11,079 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1209769000, now seen corresponding path program 334 times [2021-06-04 21:48:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:11,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115937338] [2021-06-04 21:48:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:11,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:11,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115937338] [2021-06-04 21:48:11,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115937338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:11,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436283666] [2021-06-04 21:48:11,355 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 [2021-06-04 21:48:11,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:11,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:11,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436283666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:11,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:11,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716287942] [2021-06-04 21:48:11,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:11,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:11,613 INFO L87 Difference]: Start difference. First operand 4363 states and 12153 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) [2021-06-04 21:48:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:12,593 INFO L93 Difference]: Finished difference Result 6031 states and 15692 transitions. [2021-06-04 21:48:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:48:12,594 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 [2021-06-04 21:48:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:12,599 INFO L225 Difference]: With dead ends: 6031 [2021-06-04 21:48:12,599 INFO L226 Difference]: Without dead ends: 5761 [2021-06-04 21:48:12,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:48:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-04 21:48:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4438. [2021-06-04 21:48:12,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 4437 states have (on average 2.7897227856659907) internal successors, (12378), 4437 states have internal predecessors, (12378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 12378 transitions. [2021-06-04 21:48:12,652 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 12378 transitions. Word has length 160 [2021-06-04 21:48:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:12,652 INFO L482 AbstractCegarLoop]: Abstraction has 4438 states and 12378 transitions. [2021-06-04 21:48:12,653 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) [2021-06-04 21:48:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 12378 transitions. [2021-06-04 21:48:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:12,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:12,656 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] [2021-06-04 21:48:12,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-04 21:48:12,856 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash -182181098, now seen corresponding path program 335 times [2021-06-04 21:48:12,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:12,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325158983] [2021-06-04 21:48:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:13,121 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:13,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325158983] [2021-06-04 21:48:13,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325158983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:13,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863057857] [2021-06-04 21:48:13,122 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 [2021-06-04 21:48:13,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:13,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:13,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:13,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:13,359 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:13,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863057857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:13,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:13,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:13,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72165958] [2021-06-04 21:48:13,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:13,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:13,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:13,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:13,360 INFO L87 Difference]: Start difference. First operand 4438 states and 12378 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) [2021-06-04 21:48:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:14,243 INFO L93 Difference]: Finished difference Result 6056 states and 15817 transitions. [2021-06-04 21:48:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:48:14,244 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 [2021-06-04 21:48:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:14,248 INFO L225 Difference]: With dead ends: 6056 [2021-06-04 21:48:14,248 INFO L226 Difference]: Without dead ends: 5786 [2021-06-04 21:48:14,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 879.1ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:48:14,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-04 21:48:14,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4513. [2021-06-04 21:48:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4513 states, 4512 states have (on average 2.793218085106383) internal successors, (12603), 4512 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 12603 transitions. [2021-06-04 21:48:14,299 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 12603 transitions. Word has length 160 [2021-06-04 21:48:14,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:14,299 INFO L482 AbstractCegarLoop]: Abstraction has 4513 states and 12603 transitions. [2021-06-04 21:48:14,299 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) [2021-06-04 21:48:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 12603 transitions. [2021-06-04 21:48:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:14,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:14,303 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] [2021-06-04 21:48:14,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-04 21:48:14,517 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash -427258394, now seen corresponding path program 336 times [2021-06-04 21:48:14,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:14,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225727287] [2021-06-04 21:48:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:14,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225727287] [2021-06-04 21:48:14,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225727287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:14,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265390384] [2021-06-04 21:48:14,800 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 [2021-06-04 21:48:14,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-04 21:48:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:15,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265390384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:15,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:15,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:15,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566379987] [2021-06-04 21:48:15,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:15,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:15,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:15,080 INFO L87 Difference]: Start difference. First operand 4513 states and 12603 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) [2021-06-04 21:48:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:16,075 INFO L93 Difference]: Finished difference Result 6081 states and 15942 transitions. [2021-06-04 21:48:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:48:16,075 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 [2021-06-04 21:48:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:16,081 INFO L225 Difference]: With dead ends: 6081 [2021-06-04 21:48:16,081 INFO L226 Difference]: Without dead ends: 5811 [2021-06-04 21:48:16,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 982.7ms TimeCoverageRelationStatistics Valid=1280, Invalid=4420, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:48:16,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-04 21:48:16,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4588. [2021-06-04 21:48:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4588 states, 4587 states have (on average 2.7965990843688684) internal successors, (12828), 4587 states have internal predecessors, (12828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:16,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4588 states to 4588 states and 12828 transitions. [2021-06-04 21:48:16,128 INFO L78 Accepts]: Start accepts. Automaton has 4588 states and 12828 transitions. Word has length 160 [2021-06-04 21:48:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:16,129 INFO L482 AbstractCegarLoop]: Abstraction has 4588 states and 12828 transitions. [2021-06-04 21:48:16,129 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) [2021-06-04 21:48:16,129 INFO L276 IsEmpty]: Start isEmpty. Operand 4588 states and 12828 transitions. [2021-06-04 21:48:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:16,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:16,132 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] [2021-06-04 21:48:16,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-04 21:48:16,332 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash -804108716, now seen corresponding path program 337 times [2021-06-04 21:48:16,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:16,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744031794] [2021-06-04 21:48:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:16,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744031794] [2021-06-04 21:48:16,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744031794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:16,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899190632] [2021-06-04 21:48:16,589 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 [2021-06-04 21:48:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:16,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:16,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:16,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899190632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:16,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:16,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:16,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901526570] [2021-06-04 21:48:16,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:16,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:16,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:16,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:16,840 INFO L87 Difference]: Start difference. First operand 4588 states and 12828 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) [2021-06-04 21:48:17,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:17,712 INFO L93 Difference]: Finished difference Result 6106 states and 16067 transitions. [2021-06-04 21:48:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:48:17,712 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 [2021-06-04 21:48:17,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:17,718 INFO L225 Difference]: With dead ends: 6106 [2021-06-04 21:48:17,718 INFO L226 Difference]: Without dead ends: 5836 [2021-06-04 21:48:17,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 861.9ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:48:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-04 21:48:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4663. [2021-06-04 21:48:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.7998712998713) internal successors, (13053), 4662 states have internal predecessors, (13053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:17,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13053 transitions. [2021-06-04 21:48:17,767 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13053 transitions. Word has length 160 [2021-06-04 21:48:17,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:17,767 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13053 transitions. [2021-06-04 21:48:17,767 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) [2021-06-04 21:48:17,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13053 transitions. [2021-06-04 21:48:17,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:17,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:17,771 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] [2021-06-04 21:48:17,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-04 21:48:17,971 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:17,972 INFO L82 PathProgramCache]: Analyzing trace with hash 522646820, now seen corresponding path program 338 times [2021-06-04 21:48:17,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:17,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234655006] [2021-06-04 21:48:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:18,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234655006] [2021-06-04 21:48:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234655006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654849890] [2021-06-04 21:48:18,236 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 [2021-06-04 21:48:18,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:18,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:18,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:18,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654849890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:18,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:18,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:18,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119808856] [2021-06-04 21:48:18,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:18,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:18,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:18,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:18,483 INFO L87 Difference]: Start difference. First operand 4663 states and 13053 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) [2021-06-04 21:48:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:19,558 INFO L93 Difference]: Finished difference Result 6131 states and 16192 transitions. [2021-06-04 21:48:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:48:19,558 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 [2021-06-04 21:48:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:19,565 INFO L225 Difference]: With dead ends: 6131 [2021-06-04 21:48:19,565 INFO L226 Difference]: Without dead ends: 5861 [2021-06-04 21:48:19,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1076.2ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:48:19,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-04 21:48:19,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4738. [2021-06-04 21:48:19,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4738 states, 4737 states have (on average 2.803039898670044) internal successors, (13278), 4737 states have internal predecessors, (13278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4738 states to 4738 states and 13278 transitions. [2021-06-04 21:48:19,616 INFO L78 Accepts]: Start accepts. Automaton has 4738 states and 13278 transitions. Word has length 160 [2021-06-04 21:48:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:19,616 INFO L482 AbstractCegarLoop]: Abstraction has 4738 states and 13278 transitions. [2021-06-04 21:48:19,616 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) [2021-06-04 21:48:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4738 states and 13278 transitions. [2021-06-04 21:48:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:19,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:19,620 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] [2021-06-04 21:48:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:19,820 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash 976862994, now seen corresponding path program 339 times [2021-06-04 21:48:19,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:19,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935254017] [2021-06-04 21:48:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:20,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:20,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935254017] [2021-06-04 21:48:20,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935254017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:20,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092981181] [2021-06-04 21:48:20,075 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 [2021-06-04 21:48:20,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:20,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:48:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:20,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092981181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:20,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:20,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:20,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844845071] [2021-06-04 21:48:20,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:20,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:20,311 INFO L87 Difference]: Start difference. First operand 4738 states and 13278 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) [2021-06-04 21:48:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:21,221 INFO L93 Difference]: Finished difference Result 6156 states and 16317 transitions. [2021-06-04 21:48:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:48:21,221 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 [2021-06-04 21:48:21,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:21,226 INFO L225 Difference]: With dead ends: 6156 [2021-06-04 21:48:21,227 INFO L226 Difference]: Without dead ends: 5886 [2021-06-04 21:48:21,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:48:21,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-04 21:48:21,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4813. [2021-06-04 21:48:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4813 states, 4812 states have (on average 2.8061097256857854) internal successors, (13503), 4812 states have internal predecessors, (13503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:21,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4813 states to 4813 states and 13503 transitions. [2021-06-04 21:48:21,300 INFO L78 Accepts]: Start accepts. Automaton has 4813 states and 13503 transitions. Word has length 160 [2021-06-04 21:48:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:21,300 INFO L482 AbstractCegarLoop]: Abstraction has 4813 states and 13503 transitions. [2021-06-04 21:48:21,300 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) [2021-06-04 21:48:21,300 INFO L276 IsEmpty]: Start isEmpty. Operand 4813 states and 13503 transitions. [2021-06-04 21:48:21,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:21,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:21,303 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] [2021-06-04 21:48:21,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-04 21:48:21,504 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:21,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1975759330, now seen corresponding path program 340 times [2021-06-04 21:48:21,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:21,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834441842] [2021-06-04 21:48:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:21,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834441842] [2021-06-04 21:48:21,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834441842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:21,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529445681] [2021-06-04 21:48:21,763 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 [2021-06-04 21:48:21,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:21,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:22,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529445681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:22,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:22,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:22,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397858762] [2021-06-04 21:48:22,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:22,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:22,009 INFO L87 Difference]: Start difference. First operand 4813 states and 13503 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) [2021-06-04 21:48:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:23,203 INFO L93 Difference]: Finished difference Result 6181 states and 16442 transitions. [2021-06-04 21:48:23,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:48:23,203 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 [2021-06-04 21:48:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:23,209 INFO L225 Difference]: With dead ends: 6181 [2021-06-04 21:48:23,209 INFO L226 Difference]: Without dead ends: 5911 [2021-06-04 21:48:23,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1142.9ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:48:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-04 21:48:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4888. [2021-06-04 21:48:23,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4888 states, 4887 states have (on average 2.809085328422345) internal successors, (13728), 4887 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4888 states to 4888 states and 13728 transitions. [2021-06-04 21:48:23,269 INFO L78 Accepts]: Start accepts. Automaton has 4888 states and 13728 transitions. Word has length 160 [2021-06-04 21:48:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:23,269 INFO L482 AbstractCegarLoop]: Abstraction has 4888 states and 13728 transitions. [2021-06-04 21:48:23,269 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) [2021-06-04 21:48:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 4888 states and 13728 transitions. [2021-06-04 21:48:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:23,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:23,273 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] [2021-06-04 21:48:23,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:23,474 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 96431440, now seen corresponding path program 341 times [2021-06-04 21:48:23,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:23,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304482932] [2021-06-04 21:48:23,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:23,732 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:23,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:23,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304482932] [2021-06-04 21:48:23,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304482932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:23,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731895201] [2021-06-04 21:48:23,732 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 [2021-06-04 21:48:23,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:23,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:23,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731895201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:23,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:23,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:23,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678349032] [2021-06-04 21:48:23,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:23,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:23,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:23,985 INFO L87 Difference]: Start difference. First operand 4888 states and 13728 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) [2021-06-04 21:48:24,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:24,987 INFO L93 Difference]: Finished difference Result 6206 states and 16567 transitions. [2021-06-04 21:48:24,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:48:24,987 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 [2021-06-04 21:48:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:24,993 INFO L225 Difference]: With dead ends: 6206 [2021-06-04 21:48:24,993 INFO L226 Difference]: Without dead ends: 5936 [2021-06-04 21:48:24,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 940.4ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:48:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-04 21:48:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4963. [2021-06-04 21:48:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4963 states, 4962 states have (on average 2.811970979443773) internal successors, (13953), 4962 states have internal predecessors, (13953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4963 states to 4963 states and 13953 transitions. [2021-06-04 21:48:25,055 INFO L78 Accepts]: Start accepts. Automaton has 4963 states and 13953 transitions. Word has length 160 [2021-06-04 21:48:25,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:25,055 INFO L482 AbstractCegarLoop]: Abstraction has 4963 states and 13953 transitions. [2021-06-04 21:48:25,055 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) [2021-06-04 21:48:25,055 INFO L276 IsEmpty]: Start isEmpty. Operand 4963 states and 13953 transitions. [2021-06-04 21:48:25,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:25,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:25,059 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] [2021-06-04 21:48:25,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-04 21:48:25,273 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2126750752, now seen corresponding path program 342 times [2021-06-04 21:48:25,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:25,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392329368] [2021-06-04 21:48:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:25,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392329368] [2021-06-04 21:48:25,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392329368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:25,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147970772] [2021-06-04 21:48:25,523 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 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 [2021-06-04 21:48:25,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:25,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:48:25,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:25,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147970772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:25,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:25,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:25,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885394119] [2021-06-04 21:48:25,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:25,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:25,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:25,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:25,775 INFO L87 Difference]: Start difference. First operand 4963 states and 13953 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) [2021-06-04 21:48:26,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:26,976 INFO L93 Difference]: Finished difference Result 6231 states and 16692 transitions. [2021-06-04 21:48:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:48:26,977 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 [2021-06-04 21:48:26,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:26,981 INFO L225 Difference]: With dead ends: 6231 [2021-06-04 21:48:26,982 INFO L226 Difference]: Without dead ends: 5961 [2021-06-04 21:48:26,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1079.8ms TimeCoverageRelationStatistics Valid=1595, Invalid=5047, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:48:26,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-04 21:48:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 5038. [2021-06-04 21:48:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5038 states, 5037 states have (on average 2.8147706968433592) internal successors, (14178), 5037 states have internal predecessors, (14178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5038 states to 5038 states and 14178 transitions. [2021-06-04 21:48:27,039 INFO L78 Accepts]: Start accepts. Automaton has 5038 states and 14178 transitions. Word has length 160 [2021-06-04 21:48:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:27,039 INFO L482 AbstractCegarLoop]: Abstraction has 5038 states and 14178 transitions. [2021-06-04 21:48:27,039 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) [2021-06-04 21:48:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 5038 states and 14178 transitions. [2021-06-04 21:48:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:27,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:27,043 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] [2021-06-04 21:48:27,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:27,244 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1553977074, now seen corresponding path program 343 times [2021-06-04 21:48:27,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:27,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798261867] [2021-06-04 21:48:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:27,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798261867] [2021-06-04 21:48:27,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798261867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:27,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308986336] [2021-06-04 21:48:27,500 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 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 [2021-06-04 21:48:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:27,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:27,719 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:27,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308986336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:27,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:27,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:27,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007656559] [2021-06-04 21:48:27,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:27,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:27,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:27,720 INFO L87 Difference]: Start difference. First operand 5038 states and 14178 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) [2021-06-04 21:48:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:28,789 INFO L93 Difference]: Finished difference Result 6256 states and 16817 transitions. [2021-06-04 21:48:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:48:28,789 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 [2021-06-04 21:48:28,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:28,794 INFO L225 Difference]: With dead ends: 6256 [2021-06-04 21:48:28,794 INFO L226 Difference]: Without dead ends: 5986 [2021-06-04 21:48:28,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 976.0ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:48:28,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-04 21:48:28,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 5113. [2021-06-04 21:48:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5113 states, 5112 states have (on average 2.817488262910798) internal successors, (14403), 5112 states have internal predecessors, (14403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:48:28,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 14403 transitions. [2021-06-04 21:48:28,845 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 14403 transitions. Word has length 160 [2021-06-04 21:48:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:28,846 INFO L482 AbstractCegarLoop]: Abstraction has 5113 states and 14403 transitions. [2021-06-04 21:48:28,846 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) [2021-06-04 21:48:28,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 14403 transitions. [2021-06-04 21:48:28,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:28,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:28,850 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] [2021-06-04 21:48:29,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:29,050 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:29,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:29,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1025747934, now seen corresponding path program 344 times [2021-06-04 21:48:29,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:29,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263544618] [2021-06-04 21:48:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:29,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263544618] [2021-06-04 21:48:29,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263544618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:29,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516290511] [2021-06-04 21:48:29,304 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 [2021-06-04 21:48:29,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516290511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:29,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:29,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55034530] [2021-06-04 21:48:29,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:29,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:29,547 INFO L87 Difference]: Start difference. First operand 5113 states and 14403 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) [2021-06-04 21:48:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:30,832 INFO L93 Difference]: Finished difference Result 6341 states and 17107 transitions. [2021-06-04 21:48:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:48:30,833 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 [2021-06-04 21:48:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:30,839 INFO L225 Difference]: With dead ends: 6341 [2021-06-04 21:48:30,839 INFO L226 Difference]: Without dead ends: 6071 [2021-06-04 21:48:30,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1918 ImplicationChecksByTransitivity, 1214.4ms TimeCoverageRelationStatistics Valid=2024, Invalid=5286, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:48:30,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6071 states. [2021-06-04 21:48:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6071 to 5188. [2021-06-04 21:48:30,883 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) [2021-06-04 21:48:30,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-04 21:48:30,889 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-04 21:48:30,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:30,889 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-04 21:48:30,890 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) [2021-06-04 21:48:30,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-04 21:48:30,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:30,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:30,893 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] [2021-06-04 21:48:31,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:31,094 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:31,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash -6899668, now seen corresponding path program 345 times [2021-06-04 21:48:31,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:31,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908213175] [2021-06-04 21:48:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:31,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:31,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908213175] [2021-06-04 21:48:31,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908213175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:31,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191742808] [2021-06-04 21:48:31,372 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 [2021-06-04 21:48:31,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:31,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:31,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:31,613 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:31,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191742808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:31,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:31,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-04 21:48:31,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118955400] [2021-06-04 21:48:31,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-04 21:48:31,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:31,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-04 21:48:31,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-04 21:48:31,614 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) [2021-06-04 21:48:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:32,706 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-04 21:48:32,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:48:32,706 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 [2021-06-04 21:48:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:32,713 INFO L225 Difference]: With dead ends: 7108 [2021-06-04 21:48:32,713 INFO L226 Difference]: Without dead ends: 6838 [2021-06-04 21:48:32,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:48:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-04 21:48:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-04 21:48:32,762 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) [2021-06-04 21:48:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-04 21:48:32,769 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-04 21:48:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:32,769 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-04 21:48:32,769 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) [2021-06-04 21:48:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-04 21:48:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-04 21:48:32,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:32,773 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] [2021-06-04 21:48:32,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-04 21:48:32,973 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:32,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:32,974 INFO L82 PathProgramCache]: Analyzing trace with hash 15443582, now seen corresponding path program 346 times [2021-06-04 21:48:32,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:32,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148669776] [2021-06-04 21:48:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:33,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:33,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148669776] [2021-06-04 21:48:33,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148669776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:33,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463375860] [2021-06-04 21:48:33,232 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 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 [2021-06-04 21:48:33,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:33,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-04 21:48:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:33,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463375860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:33,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:33,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-04 21:48:33,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838329652] [2021-06-04 21:48:33,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:33,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:33,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:33,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:33,503 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) [2021-06-04 21:48:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:34,812 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-04 21:48:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:48:34,812 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 [2021-06-04 21:48:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:34,818 INFO L225 Difference]: With dead ends: 6595 [2021-06-04 21:48:34,818 INFO L226 Difference]: Without dead ends: 6106 [2021-06-04 21:48:34,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1253.1ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:48:34,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-04 21:48:34,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-04 21:48:34,854 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) [2021-06-04 21:48:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-04 21:48:34,858 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-04 21:48:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:34,858 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-04 21:48:34,858 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) [2021-06-04 21:48:34,858 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-04 21:48:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:34,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:34,861 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] [2021-06-04 21:48:35,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-04 21:48:35,062 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:35,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:35,062 INFO L82 PathProgramCache]: Analyzing trace with hash 278983457, now seen corresponding path program 347 times [2021-06-04 21:48:35,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:35,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286938770] [2021-06-04 21:48:35,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:35,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:35,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286938770] [2021-06-04 21:48:35,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286938770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:35,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013143407] [2021-06-04 21:48:35,386 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 [2021-06-04 21:48:35,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:35,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:35,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013143407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:35,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:35,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:35,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441582156] [2021-06-04 21:48:35,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:35,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:35,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:35,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:35,645 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) [2021-06-04 21:48:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:36,320 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-04 21:48:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:48:36,320 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 [2021-06-04 21:48:36,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:36,325 INFO L225 Difference]: With dead ends: 5231 [2021-06-04 21:48:36,325 INFO L226 Difference]: Without dead ends: 4961 [2021-06-04 21:48:36,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 729.9ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:48:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-04 21:48:36,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-04 21:48:36,355 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) [2021-06-04 21:48:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-04 21:48:36,359 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-04 21:48:36,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:36,359 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-04 21:48:36,359 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) [2021-06-04 21:48:36,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-04 21:48:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:36,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:36,362 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] [2021-06-04 21:48:36,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-04 21:48:36,562 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash -222330383, now seen corresponding path program 348 times [2021-06-04 21:48:36,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:36,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678360343] [2021-06-04 21:48:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:36,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678360343] [2021-06-04 21:48:36,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678360343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:36,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864125964] [2021-06-04 21:48:36,923 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 [2021-06-04 21:48:37,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:37,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:37,221 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:37,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864125964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:37,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:37,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:37,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554815991] [2021-06-04 21:48:37,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:37,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:37,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:37,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:37,222 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) [2021-06-04 21:48:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:37,919 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-04 21:48:37,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:48:37,920 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 [2021-06-04 21:48:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:37,926 INFO L225 Difference]: With dead ends: 5901 [2021-06-04 21:48:37,926 INFO L226 Difference]: Without dead ends: 5631 [2021-06-04 21:48:37,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 827.0ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:48:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-04 21:48:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-04 21:48:37,965 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) [2021-06-04 21:48:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-04 21:48:37,969 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-04 21:48:37,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:37,969 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-04 21:48:37,969 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) [2021-06-04 21:48:37,969 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-04 21:48:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:37,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:37,972 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] [2021-06-04 21:48:38,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:38,183 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:38,184 INFO L82 PathProgramCache]: Analyzing trace with hash 254164959, now seen corresponding path program 349 times [2021-06-04 21:48:38,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:38,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523507088] [2021-06-04 21:48:38,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:38,518 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:38,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:38,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523507088] [2021-06-04 21:48:38,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523507088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:38,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541485303] [2021-06-04 21:48:38,518 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 [2021-06-04 21:48:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:38,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541485303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:38,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:38,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:38,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730808373] [2021-06-04 21:48:38,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:38,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:38,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:38,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:38,765 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) [2021-06-04 21:48:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:39,427 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-04 21:48:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:48:39,428 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 [2021-06-04 21:48:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:39,433 INFO L225 Difference]: With dead ends: 5931 [2021-06-04 21:48:39,433 INFO L226 Difference]: Without dead ends: 5661 [2021-06-04 21:48:39,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 765.7ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-04 21:48:39,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-04 21:48:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-04 21:48:39,468 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) [2021-06-04 21:48:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-04 21:48:39,473 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-04 21:48:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:39,473 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-04 21:48:39,473 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) [2021-06-04 21:48:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-04 21:48:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:39,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:39,476 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] [2021-06-04 21:48:39,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-04 21:48:39,676 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:39,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:39,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1720849071, now seen corresponding path program 350 times [2021-06-04 21:48:39,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:39,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143883766] [2021-06-04 21:48:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:40,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143883766] [2021-06-04 21:48:40,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143883766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:40,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744110100] [2021-06-04 21:48:40,010 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 [2021-06-04 21:48:40,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:40,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:40,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:40,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:40,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744110100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:40,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:40,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:40,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770066849] [2021-06-04 21:48:40,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:40,296 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) [2021-06-04 21:48:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:41,052 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-04 21:48:41,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:48:41,052 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 [2021-06-04 21:48:41,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:41,056 INFO L225 Difference]: With dead ends: 5956 [2021-06-04 21:48:41,056 INFO L226 Difference]: Without dead ends: 5686 [2021-06-04 21:48:41,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 843.3ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:48:41,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-04 21:48:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-04 21:48:41,090 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) [2021-06-04 21:48:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-04 21:48:41,094 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-04 21:48:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:41,094 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-04 21:48:41,094 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) [2021-06-04 21:48:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-04 21:48:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:41,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:41,097 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] [2021-06-04 21:48:41,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:41,298 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:41,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1585627677, now seen corresponding path program 351 times [2021-06-04 21:48:41,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:41,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381098342] [2021-06-04 21:48:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:41,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:41,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381098342] [2021-06-04 21:48:41,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381098342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:41,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299162617] [2021-06-04 21:48:41,601 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 [2021-06-04 21:48:41,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:41,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-04 21:48:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:41,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299162617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:41,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:41,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:41,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572018428] [2021-06-04 21:48:41,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:41,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:41,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:41,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:41,849 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) [2021-06-04 21:48:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:42,524 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-04 21:48:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:48:42,524 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 [2021-06-04 21:48:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:42,529 INFO L225 Difference]: With dead ends: 5981 [2021-06-04 21:48:42,529 INFO L226 Difference]: Without dead ends: 5711 [2021-06-04 21:48:42,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 758.8ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:48:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-04 21:48:42,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-04 21:48:42,566 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) [2021-06-04 21:48:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-04 21:48:42,570 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-04 21:48:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:42,570 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-04 21:48:42,570 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) [2021-06-04 21:48:42,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-04 21:48:42,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:42,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:42,573 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] [2021-06-04 21:48:42,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-04 21:48:42,773 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:42,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 708892909, now seen corresponding path program 352 times [2021-06-04 21:48:42,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:42,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479309117] [2021-06-04 21:48:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:43,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479309117] [2021-06-04 21:48:43,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479309117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:43,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133019421] [2021-06-04 21:48:43,090 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 [2021-06-04 21:48:43,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:43,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:43,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:43,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133019421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:43,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:43,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:43,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77385193] [2021-06-04 21:48:43,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:43,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:43,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:43,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:43,375 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) [2021-06-04 21:48:44,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:44,163 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-04 21:48:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:48:44,163 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 [2021-06-04 21:48:44,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:44,169 INFO L225 Difference]: With dead ends: 6006 [2021-06-04 21:48:44,169 INFO L226 Difference]: Without dead ends: 5736 [2021-06-04 21:48:44,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:48:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-04 21:48:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-04 21:48:44,205 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) [2021-06-04 21:48:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-04 21:48:44,210 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-04 21:48:44,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:44,210 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-04 21:48:44,210 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) [2021-06-04 21:48:44,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-04 21:48:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:44,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:44,213 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] [2021-06-04 21:48:44,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:44,413 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:44,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1028433445, now seen corresponding path program 353 times [2021-06-04 21:48:44,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:44,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016673515] [2021-06-04 21:48:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:44,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:44,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016673515] [2021-06-04 21:48:44,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016673515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:44,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071752150] [2021-06-04 21:48:44,724 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 [2021-06-04 21:48:44,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:44,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:44,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:44,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:44,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071752150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:44,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:44,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:44,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914675034] [2021-06-04 21:48:44,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:44,972 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) [2021-06-04 21:48:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:45,736 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-04 21:48:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:48:45,737 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 [2021-06-04 21:48:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:45,741 INFO L225 Difference]: With dead ends: 6031 [2021-06-04 21:48:45,741 INFO L226 Difference]: Without dead ends: 5761 [2021-06-04 21:48:45,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 834.7ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:48:45,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-04 21:48:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-04 21:48:45,778 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) [2021-06-04 21:48:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-04 21:48:45,784 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-04 21:48:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:45,784 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-04 21:48:45,784 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) [2021-06-04 21:48:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-04 21:48:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:45,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:45,787 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] [2021-06-04 21:48:45,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:45,988 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:45,988 INFO L82 PathProgramCache]: Analyzing trace with hash 336114859, now seen corresponding path program 354 times [2021-06-04 21:48:45,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:45,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102790226] [2021-06-04 21:48:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102790226] [2021-06-04 21:48:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102790226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441834966] [2021-06-04 21:48:46,297 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 [2021-06-04 21:48:46,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:46,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:46,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441834966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:46,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:46,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:46,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617641322] [2021-06-04 21:48:46,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:46,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:46,581 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) [2021-06-04 21:48:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:47,421 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-04 21:48:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:48:47,421 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 [2021-06-04 21:48:47,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:47,427 INFO L225 Difference]: With dead ends: 6056 [2021-06-04 21:48:47,427 INFO L226 Difference]: Without dead ends: 5786 [2021-06-04 21:48:47,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 896.8ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:48:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-04 21:48:47,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-04 21:48:47,464 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) [2021-06-04 21:48:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-04 21:48:47,469 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-04 21:48:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:47,469 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-04 21:48:47,469 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) [2021-06-04 21:48:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-04 21:48:47,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:47,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:47,472 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] [2021-06-04 21:48:47,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:47,673 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1941117159, now seen corresponding path program 355 times [2021-06-04 21:48:47,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:47,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735680848] [2021-06-04 21:48:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:47,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:47,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735680848] [2021-06-04 21:48:47,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735680848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:47,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126339015] [2021-06-04 21:48:47,962 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 [2021-06-04 21:48:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:48,224 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:48,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126339015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:48,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:48,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:48,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149988793] [2021-06-04 21:48:48,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:48,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:48,225 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) [2021-06-04 21:48:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:48,964 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-04 21:48:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:48:48,965 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 [2021-06-04 21:48:48,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:48,970 INFO L225 Difference]: With dead ends: 6081 [2021-06-04 21:48:48,970 INFO L226 Difference]: Without dead ends: 5811 [2021-06-04 21:48:48,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 812.8ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:48:48,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-04 21:48:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-04 21:48:49,009 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) [2021-06-04 21:48:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-04 21:48:49,013 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-04 21:48:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:49,013 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-04 21:48:49,013 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) [2021-06-04 21:48:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-04 21:48:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:49,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:49,017 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] [2021-06-04 21:48:49,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-04 21:48:49,217 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1455326697, now seen corresponding path program 356 times [2021-06-04 21:48:49,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:49,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714144487] [2021-06-04 21:48:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:49,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:49,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714144487] [2021-06-04 21:48:49,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714144487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:49,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928354296] [2021-06-04 21:48:49,524 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 [2021-06-04 21:48:49,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:49,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:49,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:49,779 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:49,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928354296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:49,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:49,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:49,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390881274] [2021-06-04 21:48:49,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:49,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:49,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:49,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:49,780 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) [2021-06-04 21:48:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:50,682 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-04 21:48:50,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:48:50,682 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 [2021-06-04 21:48:50,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:50,687 INFO L225 Difference]: With dead ends: 6106 [2021-06-04 21:48:50,687 INFO L226 Difference]: Without dead ends: 5836 [2021-06-04 21:48:50,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 943.3ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:48:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-04 21:48:50,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-04 21:48:50,724 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) [2021-06-04 21:48:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-04 21:48:50,729 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-04 21:48:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:50,729 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-04 21:48:50,729 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) [2021-06-04 21:48:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-04 21:48:50,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:50,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:50,732 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] [2021-06-04 21:48:50,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:50,933 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -159626793, now seen corresponding path program 357 times [2021-06-04 21:48:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:50,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961772374] [2021-06-04 21:48:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:51,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961772374] [2021-06-04 21:48:51,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961772374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:51,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755504298] [2021-06-04 21:48:51,215 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 [2021-06-04 21:48:51,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:48:51,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-04 21:48:51,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755504298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:51,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:51,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:51,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665083581] [2021-06-04 21:48:51,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:51,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:51,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:51,462 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) [2021-06-04 21:48:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:52,285 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-04 21:48:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:48:52,285 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 [2021-06-04 21:48:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:52,291 INFO L225 Difference]: With dead ends: 6131 [2021-06-04 21:48:52,291 INFO L226 Difference]: Without dead ends: 5861 [2021-06-04 21:48:52,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:48:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-04 21:48:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-04 21:48:52,343 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) [2021-06-04 21:48:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-04 21:48:52,350 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-04 21:48:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:52,350 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-04 21:48:52,350 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) [2021-06-04 21:48:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-04 21:48:52,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:52,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:52,354 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] [2021-06-04 21:48:52,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-04 21:48:52,554 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:52,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:52,555 INFO L82 PathProgramCache]: Analyzing trace with hash -540070745, now seen corresponding path program 358 times [2021-06-04 21:48:52,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:52,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333826142] [2021-06-04 21:48:52,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:52,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333826142] [2021-06-04 21:48:52,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333826142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:52,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265137464] [2021-06-04 21:48:52,865 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 [2021-06-04 21:48:52,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:48:52,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:52,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265137464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:53,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:53,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:53,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115764950] [2021-06-04 21:48:53,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:53,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:53,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:53,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:53,136 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) [2021-06-04 21:48:54,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:54,050 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-04 21:48:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:48:54,050 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 [2021-06-04 21:48:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:54,056 INFO L225 Difference]: With dead ends: 6156 [2021-06-04 21:48:54,056 INFO L226 Difference]: Without dead ends: 5886 [2021-06-04 21:48:54,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 986.2ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:48:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-04 21:48:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-04 21:48:54,100 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) [2021-06-04 21:48:54,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-04 21:48:54,105 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-04 21:48:54,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:54,105 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-04 21:48:54,105 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) [2021-06-04 21:48:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-04 21:48:54,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:54,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:54,108 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] [2021-06-04 21:48:54,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-04 21:48:54,309 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:54,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:54,309 INFO L82 PathProgramCache]: Analyzing trace with hash 84304405, now seen corresponding path program 359 times [2021-06-04 21:48:54,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:54,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054327655] [2021-06-04 21:48:54,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:54,585 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:54,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:54,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054327655] [2021-06-04 21:48:54,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054327655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:54,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709602807] [2021-06-04 21:48:54,586 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 [2021-06-04 21:48:54,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:48:54,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:54,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:54,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709602807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:54,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:54,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:54,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837928133] [2021-06-04 21:48:54,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:54,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:54,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:54,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:54,834 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) [2021-06-04 21:48:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:55,720 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-04 21:48:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:48:55,720 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 [2021-06-04 21:48:55,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:55,725 INFO L225 Difference]: With dead ends: 6181 [2021-06-04 21:48:55,725 INFO L226 Difference]: Without dead ends: 5911 [2021-06-04 21:48:55,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:48:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-04 21:48:55,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-04 21:48:55,769 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) [2021-06-04 21:48:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-04 21:48:55,774 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-04 21:48:55,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:55,774 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-04 21:48:55,775 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) [2021-06-04 21:48:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-04 21:48:55,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:55,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:55,778 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] [2021-06-04 21:48:55,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-04 21:48:55,985 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash 893356261, now seen corresponding path program 360 times [2021-06-04 21:48:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:55,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787060785] [2021-06-04 21:48:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:56,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:56,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787060785] [2021-06-04 21:48:56,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787060785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:56,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577898457] [2021-06-04 21:48:56,282 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 [2021-06-04 21:48:56,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:48:56,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577898457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:56,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:56,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:48:56,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520983688] [2021-06-04 21:48:56,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:48:56,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:56,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:48:56,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:48:56,552 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) [2021-06-04 21:48:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:57,553 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-04 21:48:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:48:57,553 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 [2021-06-04 21:48:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:57,558 INFO L225 Difference]: With dead ends: 6206 [2021-06-04 21:48:57,558 INFO L226 Difference]: Without dead ends: 5936 [2021-06-04 21:48:57,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1035.6ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:48:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-04 21:48:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-04 21:48:57,618 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) [2021-06-04 21:48:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-04 21:48:57,623 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-04 21:48:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:57,623 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-04 21:48:57,623 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) [2021-06-04 21:48:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-04 21:48:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:57,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:57,627 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] [2021-06-04 21:48:57,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-04 21:48:57,827 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:57,828 INFO L82 PathProgramCache]: Analyzing trace with hash -498593837, now seen corresponding path program 361 times [2021-06-04 21:48:57,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:57,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811753564] [2021-06-04 21:48:57,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:58,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811753564] [2021-06-04 21:48:58,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811753564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:58,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537333750] [2021-06-04 21:48:58,103 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 [2021-06-04 21:48:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:58,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:58,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:48:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:58,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537333750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:58,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:48:58,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:48:58,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236933172] [2021-06-04 21:48:58,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:48:58,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:48:58,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:48:58,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:48:58,340 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) [2021-06-04 21:48:59,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:48:59,202 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-04 21:48:59,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:48:59,202 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 [2021-06-04 21:48:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:48:59,207 INFO L225 Difference]: With dead ends: 6231 [2021-06-04 21:48:59,207 INFO L226 Difference]: Without dead ends: 5961 [2021-06-04 21:48:59,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 891.4ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:48:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-04 21:48:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-04 21:48:59,252 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) [2021-06-04 21:48:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-04 21:48:59,257 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-04 21:48:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:48:59,257 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-04 21:48:59,257 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) [2021-06-04 21:48:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-04 21:48:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:48:59,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:48:59,261 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] [2021-06-04 21:48:59,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:48:59,462 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:48:59,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:48:59,462 INFO L82 PathProgramCache]: Analyzing trace with hash -743671133, now seen corresponding path program 362 times [2021-06-04 21:48:59,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:48:59,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452579563] [2021-06-04 21:48:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:48:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:48:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:48:59,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:48:59,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452579563] [2021-06-04 21:48:59,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452579563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:48:59,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670282889] [2021-06-04 21:48:59,745 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 [2021-06-04 21:48:59,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:48:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:48:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:48:59,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670282889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:00,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:00,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:00,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416341253] [2021-06-04 21:49:00,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:00,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:00,019 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) [2021-06-04 21:49:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:01,051 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-04 21:49:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:49:01,051 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 [2021-06-04 21:49:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:01,057 INFO L225 Difference]: With dead ends: 6256 [2021-06-04 21:49:01,057 INFO L226 Difference]: Without dead ends: 5986 [2021-06-04 21:49:01,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1053.8ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:49:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-04 21:49:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-04 21:49:01,102 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) [2021-06-04 21:49:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-04 21:49:01,108 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-04 21:49:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:01,108 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-04 21:49:01,108 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) [2021-06-04 21:49:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-04 21:49:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:01,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:01,111 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] [2021-06-04 21:49:01,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-04 21:49:01,312 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1120521455, now seen corresponding path program 363 times [2021-06-04 21:49:01,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:01,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127887909] [2021-06-04 21:49:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:01,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:01,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127887909] [2021-06-04 21:49:01,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127887909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:01,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825175982] [2021-06-04 21:49:01,582 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 [2021-06-04 21:49:01,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:49:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-04 21:49:01,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825175982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:01,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:01,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443062978] [2021-06-04 21:49:01,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:01,825 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) [2021-06-04 21:49:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:02,755 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-04 21:49:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:49:02,756 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 [2021-06-04 21:49:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:02,760 INFO L225 Difference]: With dead ends: 6281 [2021-06-04 21:49:02,760 INFO L226 Difference]: Without dead ends: 6011 [2021-06-04 21:49:02,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 945.2ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:49:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-04 21:49:02,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-04 21:49:02,807 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) [2021-06-04 21:49:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-04 21:49:02,812 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-04 21:49:02,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:02,813 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-04 21:49:02,813 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) [2021-06-04 21:49:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-04 21:49:02,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:02,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:02,816 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] [2021-06-04 21:49:03,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:03,017 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:03,017 INFO L82 PathProgramCache]: Analyzing trace with hash 206234081, now seen corresponding path program 364 times [2021-06-04 21:49:03,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:03,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175474192] [2021-06-04 21:49:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:03,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175474192] [2021-06-04 21:49:03,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175474192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328323787] [2021-06-04 21:49:03,293 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 [2021-06-04 21:49:03,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:03,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:03,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:03,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328323787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:03,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:03,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:03,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991450515] [2021-06-04 21:49:03,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:03,562 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) [2021-06-04 21:49:04,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:04,659 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-04 21:49:04,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:49:04,659 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 [2021-06-04 21:49:04,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:04,664 INFO L225 Difference]: With dead ends: 6306 [2021-06-04 21:49:04,664 INFO L226 Difference]: Without dead ends: 6036 [2021-06-04 21:49:04,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1098.6ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:49:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-04 21:49:04,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-04 21:49:04,728 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) [2021-06-04 21:49:04,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-04 21:49:04,734 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-04 21:49:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:04,734 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-04 21:49:04,734 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) [2021-06-04 21:49:04,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-04 21:49:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:04,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:04,737 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] [2021-06-04 21:49:04,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:04,938 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash 660450255, now seen corresponding path program 365 times [2021-06-04 21:49:04,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:04,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380396163] [2021-06-04 21:49:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:05,213 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:05,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380396163] [2021-06-04 21:49:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380396163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:05,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081050369] [2021-06-04 21:49:05,214 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 [2021-06-04 21:49:05,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:49:05,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:05,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:05,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:05,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081050369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:05,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:05,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:05,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134885360] [2021-06-04 21:49:05,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:05,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:05,465 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) [2021-06-04 21:49:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:06,422 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-04 21:49:06,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:49:06,422 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 [2021-06-04 21:49:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:06,428 INFO L225 Difference]: With dead ends: 6331 [2021-06-04 21:49:06,428 INFO L226 Difference]: Without dead ends: 6061 [2021-06-04 21:49:06,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 964.0ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:49:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-04 21:49:06,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-04 21:49:06,476 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) [2021-06-04 21:49:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-04 21:49:06,482 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-04 21:49:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:06,482 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-04 21:49:06,482 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) [2021-06-04 21:49:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-04 21:49:06,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:06,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:06,486 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] [2021-06-04 21:49:06,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:06,686 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:06,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1659346591, now seen corresponding path program 366 times [2021-06-04 21:49:06,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:06,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271619297] [2021-06-04 21:49:06,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:06,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271619297] [2021-06-04 21:49:06,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271619297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:06,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419509566] [2021-06-04 21:49:06,997 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 [2021-06-04 21:49:07,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:49:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2021-06-04 21:49:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:07,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419509566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:07,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:07,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:07,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089906453] [2021-06-04 21:49:07,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:07,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:07,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:07,291 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) [2021-06-04 21:49:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:08,410 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-04 21:49:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:49:08,411 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 [2021-06-04 21:49:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:08,416 INFO L225 Difference]: With dead ends: 6356 [2021-06-04 21:49:08,416 INFO L226 Difference]: Without dead ends: 6086 [2021-06-04 21:49:08,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1144.3ms TimeCoverageRelationStatistics Valid=1703, Invalid=5437, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:49:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-04 21:49:08,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-04 21:49:08,464 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) [2021-06-04 21:49:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-04 21:49:08,470 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-04 21:49:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:08,470 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-04 21:49:08,470 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) [2021-06-04 21:49:08,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-04 21:49:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:08,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:08,474 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] [2021-06-04 21:49:08,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:08,674 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -219981299, now seen corresponding path program 367 times [2021-06-04 21:49:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513547549] [2021-06-04 21:49:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:08,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:08,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513547549] [2021-06-04 21:49:08,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513547549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:08,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493793006] [2021-06-04 21:49:08,961 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 [2021-06-04 21:49:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:09,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:09,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493793006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:09,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:09,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670181427] [2021-06-04 21:49:09,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:09,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:09,192 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) [2021-06-04 21:49:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:10,201 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-04 21:49:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:49:10,202 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 [2021-06-04 21:49:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:10,207 INFO L225 Difference]: With dead ends: 6381 [2021-06-04 21:49:10,207 INFO L226 Difference]: Without dead ends: 6111 [2021-06-04 21:49:10,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1020.5ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:49:10,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-04 21:49:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-04 21:49:10,258 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) [2021-06-04 21:49:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-04 21:49:10,264 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-04 21:49:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:10,264 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-04 21:49:10,264 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) [2021-06-04 21:49:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-04 21:49:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:10,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:10,268 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] [2021-06-04 21:49:10,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-04 21:49:10,468 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1810338013, now seen corresponding path program 368 times [2021-06-04 21:49:10,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:10,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860190512] [2021-06-04 21:49:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:10,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:10,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:10,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860190512] [2021-06-04 21:49:10,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860190512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:10,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936419873] [2021-06-04 21:49:10,742 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 [2021-06-04 21:49:10,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:10,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936419873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:10,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:10,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:10,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7555035] [2021-06-04 21:49:10,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:10,995 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) [2021-06-04 21:49:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:12,225 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-04 21:49:12,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:49:12,225 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 [2021-06-04 21:49:12,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:12,231 INFO L225 Difference]: With dead ends: 6406 [2021-06-04 21:49:12,231 INFO L226 Difference]: Without dead ends: 6136 [2021-06-04 21:49:12,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1209.6ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:49:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-04 21:49:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-04 21:49:12,289 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) [2021-06-04 21:49:12,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-04 21:49:12,298 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-04 21:49:12,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:12,298 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-04 21:49:12,298 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) [2021-06-04 21:49:12,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-04 21:49:12,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:12,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:12,302 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] [2021-06-04 21:49:12,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-04 21:49:12,509 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:12,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1870389813, now seen corresponding path program 369 times [2021-06-04 21:49:12,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:12,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016782747] [2021-06-04 21:49:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:12,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:12,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016782747] [2021-06-04 21:49:12,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016782747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:12,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017894808] [2021-06-04 21:49:12,788 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 [2021-06-04 21:49:12,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-04 21:49:12,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:12,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:49:12,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:13,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017894808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:13,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:13,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:13,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496051964] [2021-06-04 21:49:13,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:13,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:13,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:13,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:13,038 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) [2021-06-04 21:49:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:14,108 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-04 21:49:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:49:14,108 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 [2021-06-04 21:49:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:14,114 INFO L225 Difference]: With dead ends: 6431 [2021-06-04 21:49:14,114 INFO L226 Difference]: Without dead ends: 6161 [2021-06-04 21:49:14,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1055.1ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:49:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-04 21:49:14,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-04 21:49:14,165 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) [2021-06-04 21:49:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-04 21:49:14,173 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-04 21:49:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:14,173 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-04 21:49:14,173 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) [2021-06-04 21:49:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-04 21:49:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:14,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:14,178 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] [2021-06-04 21:49:14,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-04 21:49:14,397 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash 709335195, now seen corresponding path program 370 times [2021-06-04 21:49:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:14,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960108251] [2021-06-04 21:49:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:14,695 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:14,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960108251] [2021-06-04 21:49:14,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960108251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:14,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203963695] [2021-06-04 21:49:14,695 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 [2021-06-04 21:49:14,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:14,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:14,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:14,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203963695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:14,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:14,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:14,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532184311] [2021-06-04 21:49:14,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:14,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:14,941 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) [2021-06-04 21:49:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:16,216 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-04 21:49:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:49:16,217 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 [2021-06-04 21:49:16,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:16,223 INFO L225 Difference]: With dead ends: 6516 [2021-06-04 21:49:16,223 INFO L226 Difference]: Without dead ends: 6246 [2021-06-04 21:49:16,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1272.8ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:49:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-04 21:49:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-04 21:49:16,275 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) [2021-06-04 21:49:16,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-04 21:49:16,281 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-04 21:49:16,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:16,282 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-04 21:49:16,282 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) [2021-06-04 21:49:16,282 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-04 21:49:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:16,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:16,286 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] [2021-06-04 21:49:16,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-04 21:49:16,486 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:16,486 INFO L82 PathProgramCache]: Analyzing trace with hash -323312407, now seen corresponding path program 371 times [2021-06-04 21:49:16,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:16,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931537483] [2021-06-04 21:49:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:16,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:16,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931537483] [2021-06-04 21:49:16,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931537483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:16,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779298289] [2021-06-04 21:49:16,759 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 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 [2021-06-04 21:49:16,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-04 21:49:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:16,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-04 21:49:16,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:17,013 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:17,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779298289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:17,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:17,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-04 21:49:17,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327687382] [2021-06-04 21:49:17,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-04 21:49:17,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:17,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-04 21:49:17,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-04 21:49:17,014 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) [2021-06-04 21:49:18,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:18,133 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-04 21:49:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:49:18,134 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 [2021-06-04 21:49:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:18,141 INFO L225 Difference]: With dead ends: 7258 [2021-06-04 21:49:18,141 INFO L226 Difference]: Without dead ends: 6988 [2021-06-04 21:49:18,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1082.3ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:49:18,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-04 21:49:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-04 21:49:18,193 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) [2021-06-04 21:49:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-04 21:49:18,199 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-04 21:49:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:18,200 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-04 21:49:18,200 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) [2021-06-04 21:49:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-04 21:49:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-04 21:49:18,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:18,203 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] [2021-06-04 21:49:18,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:18,404 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash -300969157, now seen corresponding path program 372 times [2021-06-04 21:49:18,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:18,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369034989] [2021-06-04 21:49:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:18,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:18,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:18,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369034989] [2021-06-04 21:49:18,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369034989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:18,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239052399] [2021-06-04 21:49:18,678 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 [2021-06-04 21:49:18,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-04 21:49:18,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:18,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:18,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239052399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:18,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:18,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-04 21:49:18,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323838452] [2021-06-04 21:49:18,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:18,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:18,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:18,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:18,937 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) [2021-06-04 21:49:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:20,172 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-04 21:49:20,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:49:20,172 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 [2021-06-04 21:49:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:20,178 INFO L225 Difference]: With dead ends: 6720 [2021-06-04 21:49:20,178 INFO L226 Difference]: Without dead ends: 6231 [2021-06-04 21:49:20,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 1223.5ms TimeCoverageRelationStatistics Valid=2129, Invalid=6061, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:49:20,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-04 21:49:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-04 21:49:20,218 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) [2021-06-04 21:49:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-04 21:49:20,222 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-04 21:49:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:20,222 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-04 21:49:20,222 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) [2021-06-04 21:49:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-04 21:49:20,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:20,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:20,225 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] [2021-06-04 21:49:20,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-04 21:49:20,425 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:20,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:20,426 INFO L82 PathProgramCache]: Analyzing trace with hash 33638321, now seen corresponding path program 373 times [2021-06-04 21:49:20,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:20,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217848912] [2021-06-04 21:49:20,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:20,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217848912] [2021-06-04 21:49:20,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217848912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:20,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927973099] [2021-06-04 21:49:20,779 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 [2021-06-04 21:49:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:20,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:49:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:21,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927973099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:21,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:21,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:49:21,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601095596] [2021-06-04 21:49:21,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:49:21,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:21,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:49:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:49:21,081 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) [2021-06-04 21:49:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:21,758 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-04 21:49:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:49:21,758 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 [2021-06-04 21:49:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:21,762 INFO L225 Difference]: With dead ends: 4774 [2021-06-04 21:49:21,763 INFO L226 Difference]: Without dead ends: 4440 [2021-06-04 21:49:21,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:21,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-04 21:49:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-04 21:49:21,805 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) [2021-06-04 21:49:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-04 21:49:21,808 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-04 21:49:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:21,808 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-04 21:49:21,809 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) [2021-06-04 21:49:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-04 21:49:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:21,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:21,811 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] [2021-06-04 21:49:22,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:22,013 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 117467253, now seen corresponding path program 374 times [2021-06-04 21:49:22,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:22,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896055544] [2021-06-04 21:49:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:22,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896055544] [2021-06-04 21:49:22,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896055544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:22,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908889669] [2021-06-04 21:49:22,383 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 [2021-06-04 21:49:22,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:22,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:22,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:22,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:22,636 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:22,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908889669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:22,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:22,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:22,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365372781] [2021-06-04 21:49:22,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:22,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:22,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:22,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:22,637 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) [2021-06-04 21:49:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:23,241 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-04 21:49:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-04 21:49:23,242 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 [2021-06-04 21:49:23,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:23,247 INFO L225 Difference]: With dead ends: 6096 [2021-06-04 21:49:23,247 INFO L226 Difference]: Without dead ends: 5826 [2021-06-04 21:49:23,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-04 21:49:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-04 21:49:23,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-04 21:49:23,281 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) [2021-06-04 21:49:23,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-04 21:49:23,285 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-04 21:49:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:23,285 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-04 21:49:23,285 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) [2021-06-04 21:49:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-04 21:49:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:23,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:23,288 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] [2021-06-04 21:49:23,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:23,488 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash 815182661, now seen corresponding path program 375 times [2021-06-04 21:49:23,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:23,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437685935] [2021-06-04 21:49:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:23,864 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:23,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437685935] [2021-06-04 21:49:23,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437685935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:23,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549330289] [2021-06-04 21:49:23,864 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 [2021-06-04 21:49:23,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:23,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:23,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549330289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:24,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:24,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539453762] [2021-06-04 21:49:24,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:24,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:24,151 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) [2021-06-04 21:49:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:24,834 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-04 21:49:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:49:24,835 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 [2021-06-04 21:49:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:24,840 INFO L225 Difference]: With dead ends: 6056 [2021-06-04 21:49:24,841 INFO L226 Difference]: Without dead ends: 5786 [2021-06-04 21:49:24,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:49:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-04 21:49:24,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-04 21:49:24,876 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) [2021-06-04 21:49:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-04 21:49:24,881 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-04 21:49:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:24,881 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-04 21:49:24,881 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) [2021-06-04 21:49:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-04 21:49:24,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:24,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:24,884 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] [2021-06-04 21:49:25,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:25,084 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -904699981, now seen corresponding path program 376 times [2021-06-04 21:49:25,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:25,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969338841] [2021-06-04 21:49:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969338841] [2021-06-04 21:49:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969338841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493220909] [2021-06-04 21:49:25,424 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 [2021-06-04 21:49:25,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:25,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493220909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:25,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:25,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:25,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152855810] [2021-06-04 21:49:25,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:25,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:25,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:25,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:25,683 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) [2021-06-04 21:49:26,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:26,379 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-04 21:49:26,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-04 21:49:26,380 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 [2021-06-04 21:49:26,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:26,386 INFO L225 Difference]: With dead ends: 6106 [2021-06-04 21:49:26,386 INFO L226 Difference]: Without dead ends: 5836 [2021-06-04 21:49:26,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-04 21:49:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-04 21:49:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-04 21:49:26,427 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) [2021-06-04 21:49:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-04 21:49:26,432 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-04 21:49:26,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:26,432 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-04 21:49:26,432 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) [2021-06-04 21:49:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-04 21:49:26,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:26,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:26,435 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] [2021-06-04 21:49:26,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:26,636 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:26,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1406013821, now seen corresponding path program 377 times [2021-06-04 21:49:26,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:26,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977386368] [2021-06-04 21:49:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:26,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:27,012 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:27,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:27,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977386368] [2021-06-04 21:49:27,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977386368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:27,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597501312] [2021-06-04 21:49:27,013 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 [2021-06-04 21:49:27,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:27,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:27,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:27,290 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:27,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597501312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:27,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:27,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:27,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742526894] [2021-06-04 21:49:27,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:27,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:27,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:27,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:27,292 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) [2021-06-04 21:49:28,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:28,041 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-04 21:49:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:49:28,041 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 [2021-06-04 21:49:28,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:28,047 INFO L225 Difference]: With dead ends: 6131 [2021-06-04 21:49:28,047 INFO L226 Difference]: Without dead ends: 5861 [2021-06-04 21:49:28,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 873.2ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:28,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-04 21:49:28,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-04 21:49:28,083 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) [2021-06-04 21:49:28,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-04 21:49:28,088 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-04 21:49:28,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:28,088 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-04 21:49:28,088 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) [2021-06-04 21:49:28,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-04 21:49:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:28,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:28,091 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] [2021-06-04 21:49:28,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:28,291 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:28,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:28,292 INFO L82 PathProgramCache]: Analyzing trace with hash -929518479, now seen corresponding path program 378 times [2021-06-04 21:49:28,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:28,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530187119] [2021-06-04 21:49:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:28,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530187119] [2021-06-04 21:49:28,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530187119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711934497] [2021-06-04 21:49:28,631 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 [2021-06-04 21:49:28,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:49:28,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:28,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:28,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:28,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711934497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:28,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:28,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:28,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226131211] [2021-06-04 21:49:28,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:28,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:28,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:28,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:28,891 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) [2021-06-04 21:49:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:29,591 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-04 21:49:29,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:49:29,591 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 [2021-06-04 21:49:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:29,596 INFO L225 Difference]: With dead ends: 6156 [2021-06-04 21:49:29,596 INFO L226 Difference]: Without dead ends: 5886 [2021-06-04 21:49:29,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-04 21:49:29,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-04 21:49:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-04 21:49:29,632 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) [2021-06-04 21:49:29,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-04 21:49:29,637 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-04 21:49:29,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:29,637 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-04 21:49:29,637 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) [2021-06-04 21:49:29,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-04 21:49:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:29,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:29,640 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] [2021-06-04 21:49:29,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-04 21:49:29,840 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:29,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 537165633, now seen corresponding path program 379 times [2021-06-04 21:49:29,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:29,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246199256] [2021-06-04 21:49:29,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:30,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:30,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246199256] [2021-06-04 21:49:30,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246199256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:30,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277091351] [2021-06-04 21:49:30,181 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 [2021-06-04 21:49:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:30,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:30,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:30,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277091351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:30,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:30,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:30,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030876395] [2021-06-04 21:49:30,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:30,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:30,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:30,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:30,450 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) [2021-06-04 21:49:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:31,236 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-04 21:49:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:49:31,236 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 [2021-06-04 21:49:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:31,242 INFO L225 Difference]: With dead ends: 6181 [2021-06-04 21:49:31,242 INFO L226 Difference]: Without dead ends: 5911 [2021-06-04 21:49:31,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 905.8ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:49:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-04 21:49:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-04 21:49:31,284 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) [2021-06-04 21:49:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-04 21:49:31,311 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-04 21:49:31,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:31,312 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-04 21:49:31,312 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) [2021-06-04 21:49:31,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-04 21:49:31,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:31,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:31,315 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] [2021-06-04 21:49:31,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-04 21:49:31,515 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:31,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:31,516 INFO L82 PathProgramCache]: Analyzing trace with hash 401944239, now seen corresponding path program 380 times [2021-06-04 21:49:31,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:31,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922512681] [2021-06-04 21:49:31,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:31,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:31,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922512681] [2021-06-04 21:49:31,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922512681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:31,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019178905] [2021-06-04 21:49:31,834 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 [2021-06-04 21:49:31,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:31,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:31,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:31,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:32,087 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019178905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:32,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:32,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:32,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423823618] [2021-06-04 21:49:32,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:32,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:32,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:32,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:32,088 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) [2021-06-04 21:49:32,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:32,868 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-04 21:49:32,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:49:32,868 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 [2021-06-04 21:49:32,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:32,873 INFO L225 Difference]: With dead ends: 6206 [2021-06-04 21:49:32,873 INFO L226 Difference]: Without dead ends: 5936 [2021-06-04 21:49:32,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 835.8ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-04 21:49:32,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-04 21:49:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-04 21:49:32,911 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) [2021-06-04 21:49:32,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-04 21:49:32,916 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-04 21:49:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-04 21:49:32,916 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) [2021-06-04 21:49:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-04 21:49:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:32,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:32,919 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] [2021-06-04 21:49:33,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-04 21:49:33,120 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:33,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:33,120 INFO L82 PathProgramCache]: Analyzing trace with hash -474790529, now seen corresponding path program 381 times [2021-06-04 21:49:33,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:33,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307993252] [2021-06-04 21:49:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:33,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:33,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307993252] [2021-06-04 21:49:33,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307993252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:33,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155554340] [2021-06-04 21:49:33,473 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 [2021-06-04 21:49:33,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:33,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-04 21:49:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:33,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155554340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:33,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:33,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:33,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019220587] [2021-06-04 21:49:33,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:33,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:33,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:33,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:33,751 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) [2021-06-04 21:49:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:34,607 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-04 21:49:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:49:34,607 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 [2021-06-04 21:49:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:34,612 INFO L225 Difference]: With dead ends: 6231 [2021-06-04 21:49:34,612 INFO L226 Difference]: Without dead ends: 5961 [2021-06-04 21:49:34,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 928.7ms TimeCoverageRelationStatistics Valid=1180, Invalid=3932, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:49:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-04 21:49:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-04 21:49:34,651 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) [2021-06-04 21:49:34,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-04 21:49:34,655 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-04 21:49:34,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:34,655 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-04 21:49:34,655 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) [2021-06-04 21:49:34,656 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-04 21:49:34,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:34,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:34,659 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] [2021-06-04 21:49:34,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-04 21:49:34,860 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:34,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:34,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2082850413, now seen corresponding path program 382 times [2021-06-04 21:49:34,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:34,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771407694] [2021-06-04 21:49:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:35,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:35,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771407694] [2021-06-04 21:49:35,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771407694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:35,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38707842] [2021-06-04 21:49:35,175 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 [2021-06-04 21:49:35,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:35,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:35,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38707842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:35,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:35,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912091771] [2021-06-04 21:49:35,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:35,426 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) [2021-06-04 21:49:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:36,258 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-04 21:49:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:49:36,258 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 [2021-06-04 21:49:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:36,262 INFO L225 Difference]: With dead ends: 6256 [2021-06-04 21:49:36,262 INFO L226 Difference]: Without dead ends: 5986 [2021-06-04 21:49:36,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:49:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-04 21:49:36,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-04 21:49:36,301 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) [2021-06-04 21:49:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-04 21:49:36,305 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-04 21:49:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:36,305 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-04 21:49:36,306 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) [2021-06-04 21:49:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-04 21:49:36,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:36,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:36,309 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] [2021-06-04 21:49:36,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:36,509 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:36,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:36,509 INFO L82 PathProgramCache]: Analyzing trace with hash -847568579, now seen corresponding path program 383 times [2021-06-04 21:49:36,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:36,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498170870] [2021-06-04 21:49:36,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:36,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498170870] [2021-06-04 21:49:36,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498170870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:36,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050926128] [2021-06-04 21:49:36,841 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 [2021-06-04 21:49:36,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:36,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:36,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:36,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050926128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:37,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980905124] [2021-06-04 21:49:37,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:37,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:37,150 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) [2021-06-04 21:49:38,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:38,040 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-04 21:49:38,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:49:38,040 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 [2021-06-04 21:49:38,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:38,046 INFO L225 Difference]: With dead ends: 6281 [2021-06-04 21:49:38,046 INFO L226 Difference]: Without dead ends: 6011 [2021-06-04 21:49:38,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 994.8ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:49:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-04 21:49:38,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-04 21:49:38,090 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) [2021-06-04 21:49:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-04 21:49:38,095 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-04 21:49:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:38,095 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-04 21:49:38,095 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) [2021-06-04 21:49:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-04 21:49:38,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:38,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:38,098 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] [2021-06-04 21:49:38,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:38,299 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:38,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:38,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1170166699, now seen corresponding path program 384 times [2021-06-04 21:49:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:38,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919052705] [2021-06-04 21:49:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:38,600 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:38,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:38,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919052705] [2021-06-04 21:49:38,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919052705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:38,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985982461] [2021-06-04 21:49:38,601 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 [2021-06-04 21:49:38,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:49:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:38,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:38,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985982461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:38,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:38,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:38,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718998401] [2021-06-04 21:49:38,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:38,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:38,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:38,899 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) [2021-06-04 21:49:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:39,702 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-04 21:49:39,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:49:39,702 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 [2021-06-04 21:49:39,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:39,708 INFO L225 Difference]: With dead ends: 6306 [2021-06-04 21:49:39,708 INFO L226 Difference]: Without dead ends: 6036 [2021-06-04 21:49:39,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 860.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:49:39,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-04 21:49:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-04 21:49:39,752 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) [2021-06-04 21:49:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-04 21:49:39,757 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-04 21:49:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:39,757 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-04 21:49:39,757 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) [2021-06-04 21:49:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-04 21:49:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:39,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:39,760 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] [2021-06-04 21:49:39,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-04 21:49:39,961 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash 271643259, now seen corresponding path program 385 times [2021-06-04 21:49:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:39,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974593068] [2021-06-04 21:49:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:40,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:40,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974593068] [2021-06-04 21:49:40,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974593068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:40,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435810180] [2021-06-04 21:49:40,276 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 [2021-06-04 21:49:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:40,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:40,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435810180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:40,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:40,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:40,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116549799] [2021-06-04 21:49:40,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:40,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:40,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:40,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:40,526 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) [2021-06-04 21:49:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:41,520 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-04 21:49:41,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:49:41,520 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 [2021-06-04 21:49:41,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:41,525 INFO L225 Difference]: With dead ends: 6331 [2021-06-04 21:49:41,525 INFO L226 Difference]: Without dead ends: 6061 [2021-06-04 21:49:41,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1040.0ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:49:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-04 21:49:41,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-04 21:49:41,566 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) [2021-06-04 21:49:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-04 21:49:41,571 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-04 21:49:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:41,571 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-04 21:49:41,572 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) [2021-06-04 21:49:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-04 21:49:41,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:41,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:41,575 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] [2021-06-04 21:49:41,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:41,775 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1343310231, now seen corresponding path program 386 times [2021-06-04 21:49:41,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:41,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064771842] [2021-06-04 21:49:41,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:42,074 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:42,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064771842] [2021-06-04 21:49:42,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064771842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:42,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122793308] [2021-06-04 21:49:42,074 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 [2021-06-04 21:49:42,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:42,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:42,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:42,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122793308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:42,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:42,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:42,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143364225] [2021-06-04 21:49:42,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:42,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:42,333 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) [2021-06-04 21:49:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:43,173 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-04 21:49:43,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:49:43,173 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 [2021-06-04 21:49:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:43,178 INFO L225 Difference]: With dead ends: 6356 [2021-06-04 21:49:43,179 INFO L226 Difference]: Without dead ends: 6086 [2021-06-04 21:49:43,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 890.5ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:49:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-04 21:49:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-04 21:49:43,222 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) [2021-06-04 21:49:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-04 21:49:43,228 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-04 21:49:43,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:43,228 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-04 21:49:43,228 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) [2021-06-04 21:49:43,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-04 21:49:43,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:43,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:43,231 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] [2021-06-04 21:49:43,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-04 21:49:43,432 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:43,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1723754183, now seen corresponding path program 387 times [2021-06-04 21:49:43,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:43,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797525397] [2021-06-04 21:49:43,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:43,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:43,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797525397] [2021-06-04 21:49:43,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797525397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:43,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626772547] [2021-06-04 21:49:43,760 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 [2021-06-04 21:49:43,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-04 21:49:43,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626772547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:44,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:44,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:44,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575477635] [2021-06-04 21:49:44,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:44,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:44,028 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) [2021-06-04 21:49:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:44,989 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-04 21:49:44,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:49:44,989 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 [2021-06-04 21:49:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:44,995 INFO L225 Difference]: With dead ends: 6381 [2021-06-04 21:49:44,995 INFO L226 Difference]: Without dead ends: 6111 [2021-06-04 21:49:44,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1005.0ms TimeCoverageRelationStatistics Valid=1333, Invalid=4673, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:49:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-04 21:49:45,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-04 21:49:45,042 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) [2021-06-04 21:49:45,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-04 21:49:45,047 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-04 21:49:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:45,047 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-04 21:49:45,047 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) [2021-06-04 21:49:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-04 21:49:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:45,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:45,051 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] [2021-06-04 21:49:45,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:45,251 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1099379033, now seen corresponding path program 388 times [2021-06-04 21:49:45,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:45,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496594872] [2021-06-04 21:49:45,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:45,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496594872] [2021-06-04 21:49:45,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496594872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:45,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440748615] [2021-06-04 21:49:45,561 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 [2021-06-04 21:49:45,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:45,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:45,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440748615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:45,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:45,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:45,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882682103] [2021-06-04 21:49:45,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:45,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:45,835 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) [2021-06-04 21:49:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:46,727 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-04 21:49:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:49:46,728 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 [2021-06-04 21:49:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:46,733 INFO L225 Difference]: With dead ends: 6406 [2021-06-04 21:49:46,733 INFO L226 Difference]: Without dead ends: 6136 [2021-06-04 21:49:46,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 941.9ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:49:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-04 21:49:46,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-04 21:49:46,778 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) [2021-06-04 21:49:46,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-04 21:49:46,784 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-04 21:49:46,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:46,784 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-04 21:49:46,784 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) [2021-06-04 21:49:46,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-04 21:49:46,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:46,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:46,788 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] [2021-06-04 21:49:46,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:46,988 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:46,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:46,988 INFO L82 PathProgramCache]: Analyzing trace with hash -290327177, now seen corresponding path program 389 times [2021-06-04 21:49:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:46,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089536893] [2021-06-04 21:49:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:47,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089536893] [2021-06-04 21:49:47,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089536893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:47,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657586172] [2021-06-04 21:49:47,289 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 [2021-06-04 21:49:47,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:47,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:47,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657586172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:47,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:47,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:47,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618524807] [2021-06-04 21:49:47,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:47,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:47,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:47,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:47,555 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) [2021-06-04 21:49:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:48,701 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-04 21:49:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:49:48,702 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 [2021-06-04 21:49:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:48,707 INFO L225 Difference]: With dead ends: 6431 [2021-06-04 21:49:48,707 INFO L226 Difference]: Without dead ends: 6161 [2021-06-04 21:49:48,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1145.4ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:49:48,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-04 21:49:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-04 21:49:48,750 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) [2021-06-04 21:49:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-04 21:49:48,756 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-04 21:49:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:48,756 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-04 21:49:48,756 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) [2021-06-04 21:49:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-04 21:49:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:48,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:48,759 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] [2021-06-04 21:49:48,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:48,960 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:48,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1682277275, now seen corresponding path program 390 times [2021-06-04 21:49:48,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:48,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842992776] [2021-06-04 21:49:48,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:49,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:49,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842992776] [2021-06-04 21:49:49,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842992776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:49,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147226652] [2021-06-04 21:49:49,248 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 [2021-06-04 21:49:49,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:49:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:49,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:49,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147226652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:49,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:49,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:49,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751140762] [2021-06-04 21:49:49,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:49,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:49,507 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) [2021-06-04 21:49:50,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:50,439 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-04 21:49:50,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:49:50,440 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 [2021-06-04 21:49:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:50,446 INFO L225 Difference]: With dead ends: 6456 [2021-06-04 21:49:50,446 INFO L226 Difference]: Without dead ends: 6186 [2021-06-04 21:49:50,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 960.3ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:49:50,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-04 21:49:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-04 21:49:50,514 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) [2021-06-04 21:49:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-04 21:49:50,519 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-04 21:49:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:50,520 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-04 21:49:50,520 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) [2021-06-04 21:49:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-04 21:49:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:50,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:50,523 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] [2021-06-04 21:49:50,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-04 21:49:50,733 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1927354571, now seen corresponding path program 391 times [2021-06-04 21:49:50,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:50,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432088460] [2021-06-04 21:49:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:51,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432088460] [2021-06-04 21:49:51,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432088460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:51,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019181352] [2021-06-04 21:49:51,031 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 [2021-06-04 21:49:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:51,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019181352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:51,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:51,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:51,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353388448] [2021-06-04 21:49:51,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:51,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:51,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:51,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:51,293 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) [2021-06-04 21:49:52,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:52,456 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-04 21:49:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:49:52,456 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 [2021-06-04 21:49:52,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:52,462 INFO L225 Difference]: With dead ends: 6481 [2021-06-04 21:49:52,462 INFO L226 Difference]: Without dead ends: 6211 [2021-06-04 21:49:52,463 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1166.2ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:49:52,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-04 21:49:52,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-04 21:49:52,512 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) [2021-06-04 21:49:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-04 21:49:52,518 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-04 21:49:52,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:52,518 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-04 21:49:52,518 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) [2021-06-04 21:49:52,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-04 21:49:52,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:52,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:52,522 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] [2021-06-04 21:49:52,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:52,723 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1990762403, now seen corresponding path program 392 times [2021-06-04 21:49:52,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:52,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652395311] [2021-06-04 21:49:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:53,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652395311] [2021-06-04 21:49:53,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652395311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:53,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284055445] [2021-06-04 21:49:53,009 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 [2021-06-04 21:49:53,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:49:53,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:53,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:53,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284055445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:53,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:53,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:53,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398540696] [2021-06-04 21:49:53,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:53,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:53,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:53,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:53,276 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) [2021-06-04 21:49:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:54,298 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-04 21:49:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:49:54,299 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 [2021-06-04 21:49:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:54,305 INFO L225 Difference]: With dead ends: 6506 [2021-06-04 21:49:54,305 INFO L226 Difference]: Without dead ends: 6236 [2021-06-04 21:49:54,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1012.6ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:49:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-04 21:49:54,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-04 21:49:54,354 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) [2021-06-04 21:49:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-04 21:49:54,360 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-04 21:49:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:54,360 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-04 21:49:54,360 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) [2021-06-04 21:49:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-04 21:49:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:54,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:54,364 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] [2021-06-04 21:49:54,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-04 21:49:54,565 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:54,565 INFO L82 PathProgramCache]: Analyzing trace with hash -977449357, now seen corresponding path program 393 times [2021-06-04 21:49:54,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:54,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77028496] [2021-06-04 21:49:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:54,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77028496] [2021-06-04 21:49:54,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77028496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:54,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346415081] [2021-06-04 21:49:54,861 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 [2021-06-04 21:49:54,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:49:54,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:54,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-04 21:49:54,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:55,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346415081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:55,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:55,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:55,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341839736] [2021-06-04 21:49:55,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:55,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:55,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:55,137 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) [2021-06-04 21:49:56,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:56,331 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-04 21:49:56,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:49:56,331 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 [2021-06-04 21:49:56,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:56,338 INFO L225 Difference]: With dead ends: 6531 [2021-06-04 21:49:56,338 INFO L226 Difference]: Without dead ends: 6261 [2021-06-04 21:49:56,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 1155.1ms TimeCoverageRelationStatistics Valid=1603, Invalid=5369, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:49:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-04 21:49:56,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-04 21:49:56,394 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) [2021-06-04 21:49:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-04 21:49:56,401 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-04 21:49:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:56,401 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-04 21:49:56,401 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) [2021-06-04 21:49:56,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-04 21:49:56,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:56,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:56,405 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] [2021-06-04 21:49:56,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-04 21:49:56,605 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:56,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:56,606 INFO L82 PathProgramCache]: Analyzing trace with hash -523233183, now seen corresponding path program 394 times [2021-06-04 21:49:56,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:56,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544215430] [2021-06-04 21:49:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:56,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544215430] [2021-06-04 21:49:56,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544215430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:56,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694464779] [2021-06-04 21:49:56,891 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 [2021-06-04 21:49:56,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:49:56,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:56,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:56,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:57,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694464779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:57,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:57,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:49:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022183398] [2021-06-04 21:49:57,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:49:57,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:49:57,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:49:57,144 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) [2021-06-04 21:49:58,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:49:58,210 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-04 21:49:58,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:49:58,210 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 [2021-06-04 21:49:58,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:49:58,216 INFO L225 Difference]: With dead ends: 6556 [2021-06-04 21:49:58,216 INFO L226 Difference]: Without dead ends: 6286 [2021-06-04 21:49:58,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1060.5ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:49:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-04 21:49:58,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-04 21:49:58,263 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) [2021-06-04 21:49:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-04 21:49:58,269 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-04 21:49:58,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:49:58,269 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-04 21:49:58,270 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) [2021-06-04 21:49:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-04 21:49:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:49:58,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:49:58,273 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] [2021-06-04 21:49:58,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:49:58,474 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:49:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:49:58,474 INFO L82 PathProgramCache]: Analyzing trace with hash 475663153, now seen corresponding path program 395 times [2021-06-04 21:49:58,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:49:58,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779446723] [2021-06-04 21:49:58,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:49:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:49:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:58,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:49:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779446723] [2021-06-04 21:49:58,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779446723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:58,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320593899] [2021-06-04 21:49:58,765 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 [2021-06-04 21:49:58,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:49:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:49:58,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:49:58,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:49:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:49:59,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320593899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:49:59,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:49:59,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:49:59,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782571414] [2021-06-04 21:49:59,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:49:59,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:49:59,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:49:59,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:49:59,021 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) [2021-06-04 21:50:00,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:00,316 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-04 21:50:00,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:50:00,317 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 [2021-06-04 21:50:00,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:00,322 INFO L225 Difference]: With dead ends: 6581 [2021-06-04 21:50:00,322 INFO L226 Difference]: Without dead ends: 6311 [2021-06-04 21:50:00,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1259.2ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:00,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-04 21:50:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-04 21:50:00,368 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) [2021-06-04 21:50:00,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-04 21:50:00,374 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-04 21:50:00,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:00,374 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-04 21:50:00,374 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) [2021-06-04 21:50:00,374 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-04 21:50:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:00,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:00,378 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] [2021-06-04 21:50:00,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-04 21:50:00,578 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:00,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:00,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1403664737, now seen corresponding path program 396 times [2021-06-04 21:50:00,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:00,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883231553] [2021-06-04 21:50:00,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:00,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883231553] [2021-06-04 21:50:00,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883231553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:00,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699677360] [2021-06-04 21:50:00,863 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 [2021-06-04 21:50:00,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:00,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:00,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:50:00,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:01,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699677360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:01,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:01,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:01,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573718286] [2021-06-04 21:50:01,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:01,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:01,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:01,115 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) [2021-06-04 21:50:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:02,227 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-04 21:50:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:50:02,228 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 [2021-06-04 21:50:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:02,234 INFO L225 Difference]: With dead ends: 6606 [2021-06-04 21:50:02,235 INFO L226 Difference]: Without dead ends: 6336 [2021-06-04 21:50:02,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1087.7ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:50:02,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-04 21:50:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-04 21:50:02,292 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) [2021-06-04 21:50:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-04 21:50:02,299 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-04 21:50:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:02,299 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-04 21:50:02,299 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) [2021-06-04 21:50:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-04 21:50:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:02,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:02,304 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] [2021-06-04 21:50:02,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-04 21:50:02,504 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash 626654575, now seen corresponding path program 397 times [2021-06-04 21:50:02,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:02,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580528312] [2021-06-04 21:50:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:02,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580528312] [2021-06-04 21:50:02,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580528312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:02,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495893359] [2021-06-04 21:50:02,855 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 [2021-06-04 21:50:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:03,113 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:03,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495893359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:03,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:03,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:03,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485228185] [2021-06-04 21:50:03,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:03,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:03,114 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) [2021-06-04 21:50:04,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:04,567 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-04 21:50:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:50:04,567 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 [2021-06-04 21:50:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:04,574 INFO L225 Difference]: With dead ends: 6631 [2021-06-04 21:50:04,574 INFO L226 Difference]: Without dead ends: 6361 [2021-06-04 21:50:04,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1429.0ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-04 21:50:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-04 21:50:04,632 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) [2021-06-04 21:50:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-04 21:50:04,639 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-04 21:50:04,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:04,639 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-04 21:50:04,639 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) [2021-06-04 21:50:04,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-04 21:50:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:04,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:04,643 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] [2021-06-04 21:50:04,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:04,844 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1240894045, now seen corresponding path program 398 times [2021-06-04 21:50:04,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:04,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747747414] [2021-06-04 21:50:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:05,135 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:05,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:05,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747747414] [2021-06-04 21:50:05,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747747414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:05,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252953221] [2021-06-04 21:50:05,135 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 [2021-06-04 21:50:05,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:05,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:05,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:05,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252953221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:05,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:05,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808575849] [2021-06-04 21:50:05,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:05,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:05,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:05,397 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) [2021-06-04 21:50:06,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:06,709 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-04 21:50:06,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:50:06,709 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 [2021-06-04 21:50:06,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:06,716 INFO L225 Difference]: With dead ends: 6656 [2021-06-04 21:50:06,716 INFO L226 Difference]: Without dead ends: 6386 [2021-06-04 21:50:06,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1207.6ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-04 21:50:06,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-04 21:50:06,778 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) [2021-06-04 21:50:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-04 21:50:06,786 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-04 21:50:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:06,786 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-04 21:50:06,786 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) [2021-06-04 21:50:06,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-04 21:50:06,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:06,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:06,791 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] [2021-06-04 21:50:06,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:06,991 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:06,992 INFO L82 PathProgramCache]: Analyzing trace with hash -474348243, now seen corresponding path program 399 times [2021-06-04 21:50:06,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:06,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334944402] [2021-06-04 21:50:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:07,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334944402] [2021-06-04 21:50:07,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334944402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:07,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724575197] [2021-06-04 21:50:07,292 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 [2021-06-04 21:50:07,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:07,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:50:07,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:07,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724575197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:07,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:07,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-04 21:50:07,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972782577] [2021-06-04 21:50:07,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-04 21:50:07,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:07,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-04 21:50:07,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-04 21:50:07,558 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) [2021-06-04 21:50:08,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:08,890 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-04 21:50:08,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:50:08,890 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 [2021-06-04 21:50:08,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:08,898 INFO L225 Difference]: With dead ends: 6741 [2021-06-04 21:50:08,898 INFO L226 Difference]: Without dead ends: 6471 [2021-06-04 21:50:08,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 1295.1ms TimeCoverageRelationStatistics Valid=1990, Invalid=6020, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:08,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-04 21:50:08,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-04 21:50:08,956 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) [2021-06-04 21:50:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-04 21:50:08,963 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-04 21:50:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:08,963 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-04 21:50:08,963 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) [2021-06-04 21:50:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-04 21:50:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:08,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:08,968 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] [2021-06-04 21:50:09,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:09,174 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1506995845, now seen corresponding path program 400 times [2021-06-04 21:50:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:09,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072695086] [2021-06-04 21:50:09,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:09,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072695086] [2021-06-04 21:50:09,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072695086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:09,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310931701] [2021-06-04 21:50:09,484 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 [2021-06-04 21:50:09,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:09,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:09,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:09,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:09,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310931701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:09,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:09,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-04 21:50:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49161471] [2021-06-04 21:50:09,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-04 21:50:09,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-04 21:50:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-04 21:50:09,739 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) [2021-06-04 21:50:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:10,912 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-04 21:50:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:50:10,912 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 [2021-06-04 21:50:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:10,920 INFO L225 Difference]: With dead ends: 7508 [2021-06-04 21:50:10,920 INFO L226 Difference]: Without dead ends: 7238 [2021-06-04 21:50:10,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1182.1ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-04 21:50:10,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-04 21:50:10,976 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) [2021-06-04 21:50:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-04 21:50:10,983 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-04 21:50:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:10,983 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-04 21:50:10,983 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) [2021-06-04 21:50:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-04 21:50:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-04 21:50:10,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:10,987 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] [2021-06-04 21:50:11,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:11,188 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1484652595, now seen corresponding path program 401 times [2021-06-04 21:50:11,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:11,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882909074] [2021-06-04 21:50:11,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:11,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:11,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:11,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882909074] [2021-06-04 21:50:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882909074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:11,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976073982] [2021-06-04 21:50:11,564 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 [2021-06-04 21:50:11,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:11,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-04 21:50:11,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:11,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976073982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:11,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:11,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-06-04 21:50:11,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112935573] [2021-06-04 21:50:11,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:11,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:11,848 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:13,686 INFO L93 Difference]: Finished difference Result 7451 states and 20241 transitions. [2021-06-04 21:50:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-04 21:50:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:13,694 INFO L225 Difference]: With dead ends: 7451 [2021-06-04 21:50:13,694 INFO L226 Difference]: Without dead ends: 6876 [2021-06-04 21:50:13,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 1817.6ms TimeCoverageRelationStatistics Valid=2617, Invalid=6889, Unknown=0, NotChecked=0, Total=9506 [2021-06-04 21:50:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-04 21:50:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-04 21:50:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:13,756 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 170 [2021-06-04 21:50:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:13,756 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:13,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 4.942857142857143) internal successors, (173), 35 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:13,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:13,761 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] [2021-06-04 21:50:13,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:13,961 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:13,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:13,961 INFO L82 PathProgramCache]: Analyzing trace with hash -435860238, now seen corresponding path program 402 times [2021-06-04 21:50:13,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:13,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588952964] [2021-06-04 21:50:13,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:14,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:14,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588952964] [2021-06-04 21:50:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588952964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:14,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921169327] [2021-06-04 21:50:14,364 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 [2021-06-04 21:50:14,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:14,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:14,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:14,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:14,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921169327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:14,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:14,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:14,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537823378] [2021-06-04 21:50:14,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:14,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:14,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:14,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:14,678 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:15,447 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-04 21:50:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:50:15,447 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 [2021-06-04 21:50:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:15,455 INFO L225 Difference]: With dead ends: 7496 [2021-06-04 21:50:15,456 INFO L226 Difference]: Without dead ends: 7226 [2021-06-04 21:50:15,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 934.4ms TimeCoverageRelationStatistics Valid=1270, Invalid=3422, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:50:15,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-04 21:50:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-04 21:50:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:15,562 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:15,562 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:15,562 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) [2021-06-04 21:50:15,562 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:15,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:15,566 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] [2021-06-04 21:50:15,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-04 21:50:15,767 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:15,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:15,767 INFO L82 PathProgramCache]: Analyzing trace with hash 261855170, now seen corresponding path program 403 times [2021-06-04 21:50:15,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:15,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914595559] [2021-06-04 21:50:15,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:16,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:16,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914595559] [2021-06-04 21:50:16,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914595559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:16,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766442642] [2021-06-04 21:50:16,155 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 [2021-06-04 21:50:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:16,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:16,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766442642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:16,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:16,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:16,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859198779] [2021-06-04 21:50:16,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:16,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:16,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:16,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:16,458 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:17,253 INFO L93 Difference]: Finished difference Result 8141 states and 21187 transitions. [2021-06-04 21:50:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:50:17,253 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:17,262 INFO L225 Difference]: With dead ends: 8141 [2021-06-04 21:50:17,262 INFO L226 Difference]: Without dead ends: 7871 [2021-06-04 21:50:17,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 980.0ms TimeCoverageRelationStatistics Valid=1340, Invalid=3772, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:50:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-06-04 21:50:17,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5753. [2021-06-04 21:50:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:17,329 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:17,329 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:17,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:17,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:17,334 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] [2021-06-04 21:50:17,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-04 21:50:17,535 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1458027472, now seen corresponding path program 404 times [2021-06-04 21:50:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:17,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286031761] [2021-06-04 21:50:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:17,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286031761] [2021-06-04 21:50:17,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286031761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:17,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994401438] [2021-06-04 21:50:17,899 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 [2021-06-04 21:50:17,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:17,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:17,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:18,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994401438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:18,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:18,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:18,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693651805] [2021-06-04 21:50:18,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:18,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:18,209 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:18,928 INFO L93 Difference]: Finished difference Result 8096 states and 21097 transitions. [2021-06-04 21:50:18,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:50:18,928 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 [2021-06-04 21:50:18,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:18,937 INFO L225 Difference]: With dead ends: 8096 [2021-06-04 21:50:18,937 INFO L226 Difference]: Without dead ends: 7826 [2021-06-04 21:50:18,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 860.6ms TimeCoverageRelationStatistics Valid=1328, Invalid=3784, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:50:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-04 21:50:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 5753. [2021-06-04 21:50:18,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:18,999 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:19,000 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:19,000 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) [2021-06-04 21:50:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:19,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:19,004 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] [2021-06-04 21:50:19,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:19,204 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1959341312, now seen corresponding path program 405 times [2021-06-04 21:50:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:19,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818179185] [2021-06-04 21:50:19,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:19,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:19,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818179185] [2021-06-04 21:50:19,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818179185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:19,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671126686] [2021-06-04 21:50:19,655 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 [2021-06-04 21:50:19,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:19,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:19,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:19,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:19,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671126686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:19,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:19,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:19,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714276113] [2021-06-04 21:50:19,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:19,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:19,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:19,970 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:20,785 INFO L93 Difference]: Finished difference Result 8046 states and 20997 transitions. [2021-06-04 21:50:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:50:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:20,792 INFO L225 Difference]: With dead ends: 8046 [2021-06-04 21:50:20,792 INFO L226 Difference]: Without dead ends: 7776 [2021-06-04 21:50:20,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=1351, Invalid=4051, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:50:20,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-04 21:50:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 5753. [2021-06-04 21:50:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:20,850 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:20,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:20,850 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:20,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:20,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:20,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:20,855 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] [2021-06-04 21:50:21,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-04 21:50:21,069 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:21,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1482845970, now seen corresponding path program 406 times [2021-06-04 21:50:21,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:21,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760531194] [2021-06-04 21:50:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:21,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:21,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760531194] [2021-06-04 21:50:21,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760531194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:21,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081050302] [2021-06-04 21:50:21,415 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 [2021-06-04 21:50:21,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:21,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:21,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081050302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:21,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:21,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:21,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360425543] [2021-06-04 21:50:21,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:21,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:21,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:21,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:21,692 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:22,538 INFO L93 Difference]: Finished difference Result 7996 states and 20897 transitions. [2021-06-04 21:50:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:50:22,538 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 [2021-06-04 21:50:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:22,546 INFO L225 Difference]: With dead ends: 7996 [2021-06-04 21:50:22,546 INFO L226 Difference]: Without dead ends: 7726 [2021-06-04 21:50:22,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 896.2ms TimeCoverageRelationStatistics Valid=1353, Invalid=4049, Unknown=0, NotChecked=0, Total=5402 [2021-06-04 21:50:22,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-04 21:50:22,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 5753. [2021-06-04 21:50:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:22,608 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:22,608 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:22,608 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) [2021-06-04 21:50:22,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:22,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:22,613 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] [2021-06-04 21:50:22,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-04 21:50:22,813 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:22,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash -16161858, now seen corresponding path program 407 times [2021-06-04 21:50:22,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:22,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875091139] [2021-06-04 21:50:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:23,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:23,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875091139] [2021-06-04 21:50:23,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875091139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:23,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125083006] [2021-06-04 21:50:23,209 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 [2021-06-04 21:50:23,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:23,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:23,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:23,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125083006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:23,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:23,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:23,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127607030] [2021-06-04 21:50:23,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:23,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:23,511 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:24,384 INFO L93 Difference]: Finished difference Result 7946 states and 20797 transitions. [2021-06-04 21:50:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:50:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:24,392 INFO L225 Difference]: With dead ends: 7946 [2021-06-04 21:50:24,392 INFO L226 Difference]: Without dead ends: 7676 [2021-06-04 21:50:24,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=1378, Invalid=4322, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:50:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-04 21:50:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 5753. [2021-06-04 21:50:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:24,462 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:24,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:24,462 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:24,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:24,462 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:24,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:24,467 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] [2021-06-04 21:50:24,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-04 21:50:24,680 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:24,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:24,680 INFO L82 PathProgramCache]: Analyzing trace with hash -151383252, now seen corresponding path program 408 times [2021-06-04 21:50:24,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:24,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402459330] [2021-06-04 21:50:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:25,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402459330] [2021-06-04 21:50:25,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402459330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:25,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452774029] [2021-06-04 21:50:25,039 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 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 [2021-06-04 21:50:25,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:25,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:25,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:25,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:25,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452774029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:25,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:25,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:25,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052146353] [2021-06-04 21:50:25,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:25,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:25,358 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:26,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:26,172 INFO L93 Difference]: Finished difference Result 7896 states and 20697 transitions. [2021-06-04 21:50:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:50:26,172 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 [2021-06-04 21:50:26,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:26,180 INFO L225 Difference]: With dead ends: 7896 [2021-06-04 21:50:26,180 INFO L226 Difference]: Without dead ends: 7626 [2021-06-04 21:50:26,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 920.9ms TimeCoverageRelationStatistics Valid=1394, Invalid=4306, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:50:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-04 21:50:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 5753. [2021-06-04 21:50:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:26,251 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:26,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:26,251 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:26,251 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) [2021-06-04 21:50:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:26,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:26,256 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] [2021-06-04 21:50:26,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-04 21:50:26,456 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1028118020, now seen corresponding path program 409 times [2021-06-04 21:50:26,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:26,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496285228] [2021-06-04 21:50:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:26,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496285228] [2021-06-04 21:50:26,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496285228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:26,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375907232] [2021-06-04 21:50:26,815 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 [2021-06-04 21:50:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:26,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:26,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:27,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375907232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:27,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:27,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:27,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504497142] [2021-06-04 21:50:27,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:27,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:27,107 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:28,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:28,086 INFO L93 Difference]: Finished difference Result 7846 states and 20597 transitions. [2021-06-04 21:50:28,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:50:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:28,094 INFO L225 Difference]: With dead ends: 7846 [2021-06-04 21:50:28,094 INFO L226 Difference]: Without dead ends: 7576 [2021-06-04 21:50:28,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 1030.6ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:50:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-04 21:50:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 5753. [2021-06-04 21:50:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:28,157 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:28,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:28,157 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:28,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:28,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:28,162 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] [2021-06-04 21:50:28,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:28,363 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1529522922, now seen corresponding path program 410 times [2021-06-04 21:50:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:28,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485011819] [2021-06-04 21:50:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:28,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:28,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485011819] [2021-06-04 21:50:28,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485011819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:28,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780686138] [2021-06-04 21:50:28,727 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 [2021-06-04 21:50:28,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:29,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780686138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:29,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:29,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235488775] [2021-06-04 21:50:29,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:29,015 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:29,879 INFO L93 Difference]: Finished difference Result 7796 states and 20497 transitions. [2021-06-04 21:50:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:50:29,879 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 [2021-06-04 21:50:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:29,887 INFO L225 Difference]: With dead ends: 7796 [2021-06-04 21:50:29,887 INFO L226 Difference]: Without dead ends: 7526 [2021-06-04 21:50:29,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 971.0ms TimeCoverageRelationStatistics Valid=1451, Invalid=4555, Unknown=0, NotChecked=0, Total=6006 [2021-06-04 21:50:29,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-04 21:50:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 5753. [2021-06-04 21:50:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:29,964 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:29,964 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:29,964 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) [2021-06-04 21:50:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:29,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:29,968 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] [2021-06-04 21:50:30,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-04 21:50:30,169 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:30,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1400896070, now seen corresponding path program 411 times [2021-06-04 21:50:30,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:30,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599453669] [2021-06-04 21:50:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:30,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:30,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599453669] [2021-06-04 21:50:30,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599453669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:30,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264288043] [2021-06-04 21:50:30,523 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 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 [2021-06-04 21:50:30,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-04 21:50:30,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:30,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264288043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:30,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:30,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:30,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117570317] [2021-06-04 21:50:30,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:30,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:30,822 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:31,780 INFO L93 Difference]: Finished difference Result 7746 states and 20397 transitions. [2021-06-04 21:50:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:50:31,781 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:31,788 INFO L225 Difference]: With dead ends: 7746 [2021-06-04 21:50:31,788 INFO L226 Difference]: Without dead ends: 7476 [2021-06-04 21:50:31,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=1447, Invalid=4873, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:50:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-04 21:50:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 5753. [2021-06-04 21:50:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:31,847 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:31,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:31,847 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:31,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:31,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:31,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:31,851 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] [2021-06-04 21:50:32,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-04 21:50:32,052 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:32,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:32,052 INFO L82 PathProgramCache]: Analyzing trace with hash 616839208, now seen corresponding path program 412 times [2021-06-04 21:50:32,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:32,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070383562] [2021-06-04 21:50:32,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:32,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:32,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070383562] [2021-06-04 21:50:32,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070383562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:32,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760561186] [2021-06-04 21:50:32,406 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 [2021-06-04 21:50:32,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:32,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:32,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:32,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:32,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760561186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:32,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:32,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:32,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515663646] [2021-06-04 21:50:32,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:32,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:32,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:32,681 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:33,575 INFO L93 Difference]: Finished difference Result 7696 states and 20297 transitions. [2021-06-04 21:50:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:50:33,575 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 [2021-06-04 21:50:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:33,583 INFO L225 Difference]: With dead ends: 7696 [2021-06-04 21:50:33,583 INFO L226 Difference]: Without dead ends: 7426 [2021-06-04 21:50:33,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 986.0ms TimeCoverageRelationStatistics Valid=1524, Invalid=4796, Unknown=0, NotChecked=0, Total=6320 [2021-06-04 21:50:33,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-04 21:50:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 5753. [2021-06-04 21:50:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:33,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:33,644 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:33,644 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:33,644 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) [2021-06-04 21:50:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:33,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:33,648 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] [2021-06-04 21:50:33,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-04 21:50:33,849 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -281684232, now seen corresponding path program 413 times [2021-06-04 21:50:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:33,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649302736] [2021-06-04 21:50:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:34,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:34,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649302736] [2021-06-04 21:50:34,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649302736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:34,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284349852] [2021-06-04 21:50:34,177 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 [2021-06-04 21:50:34,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:34,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:34,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:34,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284349852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:34,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:34,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:34,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854019909] [2021-06-04 21:50:34,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:34,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:34,486 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:35,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:35,574 INFO L93 Difference]: Finished difference Result 7646 states and 20197 transitions. [2021-06-04 21:50:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:50:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:35,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:35,583 INFO L225 Difference]: With dead ends: 7646 [2021-06-04 21:50:35,583 INFO L226 Difference]: Without dead ends: 7376 [2021-06-04 21:50:35,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1556 ImplicationChecksByTransitivity, 1141.5ms TimeCoverageRelationStatistics Valid=1555, Invalid=5087, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:50:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-04 21:50:35,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 5753. [2021-06-04 21:50:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:35,651 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:35,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:35,651 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:35,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:35,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:35,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:35,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:35,656 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] [2021-06-04 21:50:35,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-04 21:50:35,857 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:35,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1896637722, now seen corresponding path program 414 times [2021-06-04 21:50:35,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:35,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338126148] [2021-06-04 21:50:35,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:36,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:36,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338126148] [2021-06-04 21:50:36,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338126148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:36,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470542044] [2021-06-04 21:50:36,188 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 [2021-06-04 21:50:36,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:36,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470542044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:36,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:36,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627997204] [2021-06-04 21:50:36,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:36,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:36,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:36,476 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:37,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:37,443 INFO L93 Difference]: Finished difference Result 7596 states and 20097 transitions. [2021-06-04 21:50:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:50:37,443 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 [2021-06-04 21:50:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:37,450 INFO L225 Difference]: With dead ends: 7596 [2021-06-04 21:50:37,450 INFO L226 Difference]: Without dead ends: 7326 [2021-06-04 21:50:37,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=1613, Invalid=5029, Unknown=0, NotChecked=0, Total=6642 [2021-06-04 21:50:37,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-04 21:50:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 5753. [2021-06-04 21:50:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:37,506 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:37,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:37,506 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:37,506 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) [2021-06-04 21:50:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:37,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:37,510 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] [2021-06-04 21:50:37,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:37,711 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:37,711 INFO L82 PathProgramCache]: Analyzing trace with hash 2017885622, now seen corresponding path program 415 times [2021-06-04 21:50:37,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:37,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621099684] [2021-06-04 21:50:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:38,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:38,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621099684] [2021-06-04 21:50:38,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621099684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:38,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790452671] [2021-06-04 21:50:38,039 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 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 [2021-06-04 21:50:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:38,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:38,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790452671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:38,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:38,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:38,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582877608] [2021-06-04 21:50:38,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:38,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:38,323 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:39,446 INFO L93 Difference]: Finished difference Result 7546 states and 19997 transitions. [2021-06-04 21:50:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:50:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:39,454 INFO L225 Difference]: With dead ends: 7546 [2021-06-04 21:50:39,454 INFO L226 Difference]: Without dead ends: 7276 [2021-06-04 21:50:39,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1169.4ms TimeCoverageRelationStatistics Valid=1646, Invalid=5326, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:50:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-04 21:50:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 5753. [2021-06-04 21:50:39,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:39,556 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:39,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:39,556 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:39,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:39,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:39,560 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] [2021-06-04 21:50:39,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-04 21:50:39,761 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1652706524, now seen corresponding path program 416 times [2021-06-04 21:50:39,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:39,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648622619] [2021-06-04 21:50:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:40,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:40,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648622619] [2021-06-04 21:50:40,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648622619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:40,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161481036] [2021-06-04 21:50:40,073 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 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 [2021-06-04 21:50:40,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:40,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:40,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:40,369 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:40,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161481036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:40,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:40,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:40,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121332378] [2021-06-04 21:50:40,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:40,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:40,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:40,370 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:41,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:41,365 INFO L93 Difference]: Finished difference Result 7496 states and 19897 transitions. [2021-06-04 21:50:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:50:41,365 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 [2021-06-04 21:50:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:41,374 INFO L225 Difference]: With dead ends: 7496 [2021-06-04 21:50:41,374 INFO L226 Difference]: Without dead ends: 7226 [2021-06-04 21:50:41,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 1023.0ms TimeCoverageRelationStatistics Valid=1718, Invalid=5254, Unknown=0, NotChecked=0, Total=6972 [2021-06-04 21:50:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-04 21:50:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 5753. [2021-06-04 21:50:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:41,438 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:41,438 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) [2021-06-04 21:50:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:41,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:41,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:41,443 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] [2021-06-04 21:50:41,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:41,643 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -843654668, now seen corresponding path program 417 times [2021-06-04 21:50:41,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:41,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593626650] [2021-06-04 21:50:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:41,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593626650] [2021-06-04 21:50:41,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593626650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:41,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783745325] [2021-06-04 21:50:41,973 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 [2021-06-04 21:50:42,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:42,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:42,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-04 21:50:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:42,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783745325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:42,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:42,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:42,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397228981] [2021-06-04 21:50:42,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:42,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:42,368 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:43,531 INFO L93 Difference]: Finished difference Result 7446 states and 19797 transitions. [2021-06-04 21:50:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:50:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:43,539 INFO L225 Difference]: With dead ends: 7446 [2021-06-04 21:50:43,539 INFO L226 Difference]: Without dead ends: 7176 [2021-06-04 21:50:43,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 1176.3ms TimeCoverageRelationStatistics Valid=1666, Invalid=5644, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:50:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-04 21:50:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5753. [2021-06-04 21:50:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:43,598 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:43,599 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:43,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:43,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:43,603 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] [2021-06-04 21:50:43,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-04 21:50:43,803 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2059362530, now seen corresponding path program 418 times [2021-06-04 21:50:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:43,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730236925] [2021-06-04 21:50:43,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:44,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730236925] [2021-06-04 21:50:44,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730236925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:44,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51651399] [2021-06-04 21:50:44,112 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 [2021-06-04 21:50:44,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:44,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51651399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:44,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:44,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:44,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880526011] [2021-06-04 21:50:44,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:44,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:44,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:44,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:44,380 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:45,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:45,411 INFO L93 Difference]: Finished difference Result 7396 states and 19697 transitions. [2021-06-04 21:50:45,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:50:45,412 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 [2021-06-04 21:50:45,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:45,419 INFO L225 Difference]: With dead ends: 7396 [2021-06-04 21:50:45,419 INFO L226 Difference]: Without dead ends: 7126 [2021-06-04 21:50:45,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1065.0ms TimeCoverageRelationStatistics Valid=1839, Invalid=5471, Unknown=0, NotChecked=0, Total=7310 [2021-06-04 21:50:45,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-04 21:50:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 5753. [2021-06-04 21:50:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:45,478 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:45,478 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:45,478 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) [2021-06-04 21:50:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:45,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:45,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:45,482 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] [2021-06-04 21:50:45,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:45,697 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1814285234, now seen corresponding path program 419 times [2021-06-04 21:50:45,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:45,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357903348] [2021-06-04 21:50:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:46,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:46,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357903348] [2021-06-04 21:50:46,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357903348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:46,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341571170] [2021-06-04 21:50:46,051 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 [2021-06-04 21:50:46,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:46,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:46,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:46,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:46,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341571170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:46,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:46,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:46,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834896988] [2021-06-04 21:50:46,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:46,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:46,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:46,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:46,340 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:47,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:47,567 INFO L93 Difference]: Finished difference Result 7346 states and 19597 transitions. [2021-06-04 21:50:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:50:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:47,574 INFO L225 Difference]: With dead ends: 7346 [2021-06-04 21:50:47,574 INFO L226 Difference]: Without dead ends: 7076 [2021-06-04 21:50:47,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1281.5ms TimeCoverageRelationStatistics Valid=1876, Invalid=5780, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7076 states. [2021-06-04 21:50:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7076 to 5753. [2021-06-04 21:50:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:47,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:47,630 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:47,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:47,630 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:47,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:47,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:47,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:47,634 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] [2021-06-04 21:50:47,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:47,834 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:47,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1437434912, now seen corresponding path program 420 times [2021-06-04 21:50:47,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:47,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379574250] [2021-06-04 21:50:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379574250] [2021-06-04 21:50:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379574250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215755872] [2021-06-04 21:50:48,146 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 [2021-06-04 21:50:48,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:50:48,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:48,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-04 21:50:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215755872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673650520] [2021-06-04 21:50:48,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:48,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:48,422 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:49,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:49,508 INFO L93 Difference]: Finished difference Result 7296 states and 19497 transitions. [2021-06-04 21:50:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:50:49,508 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 [2021-06-04 21:50:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:49,514 INFO L225 Difference]: With dead ends: 7296 [2021-06-04 21:50:49,514 INFO L226 Difference]: Without dead ends: 7026 [2021-06-04 21:50:49,515 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1099.1ms TimeCoverageRelationStatistics Valid=1976, Invalid=5680, Unknown=0, NotChecked=0, Total=7656 [2021-06-04 21:50:49,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-04 21:50:49,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5753. [2021-06-04 21:50:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:49,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:49,573 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:49,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:49,573 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:49,573 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) [2021-06-04 21:50:49,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:49,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:49,578 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] [2021-06-04 21:50:49,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:49,778 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:49,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:49,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1530776848, now seen corresponding path program 421 times [2021-06-04 21:50:49,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:49,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71286468] [2021-06-04 21:50:49,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:50,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:50,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71286468] [2021-06-04 21:50:50,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71286468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:50,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963833711] [2021-06-04 21:50:50,119 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 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 [2021-06-04 21:50:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:50,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:50,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963833711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:50,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:50,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:50,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258180064] [2021-06-04 21:50:50,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:50,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:50,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:50,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:50,396 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:51,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:51,664 INFO L93 Difference]: Finished difference Result 7246 states and 19397 transitions. [2021-06-04 21:50:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:50:51,665 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:51,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:51,672 INFO L225 Difference]: With dead ends: 7246 [2021-06-04 21:50:51,672 INFO L226 Difference]: Without dead ends: 6976 [2021-06-04 21:50:51,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 1294.6ms TimeCoverageRelationStatistics Valid=2015, Invalid=5995, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-04 21:50:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5753. [2021-06-04 21:50:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:51,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:51,735 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:51,735 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:51,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:51,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:51,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:51,764 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] [2021-06-04 21:50:51,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:51,965 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:51,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:51,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1076560674, now seen corresponding path program 422 times [2021-06-04 21:50:51,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:51,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601222548] [2021-06-04 21:50:51,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:52,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601222548] [2021-06-04 21:50:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601222548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285277916] [2021-06-04 21:50:52,270 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 [2021-06-04 21:50:52,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:50:52,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:52,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:52,532 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:52,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285277916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:52,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:52,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:52,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397948945] [2021-06-04 21:50:52,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:52,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:52,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:52,533 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:53,631 INFO L93 Difference]: Finished difference Result 7196 states and 19297 transitions. [2021-06-04 21:50:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:50:53,632 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 [2021-06-04 21:50:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:53,639 INFO L225 Difference]: With dead ends: 7196 [2021-06-04 21:50:53,639 INFO L226 Difference]: Without dead ends: 6926 [2021-06-04 21:50:53,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1091.3ms TimeCoverageRelationStatistics Valid=2129, Invalid=5881, Unknown=0, NotChecked=0, Total=8010 [2021-06-04 21:50:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-04 21:50:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5753. [2021-06-04 21:50:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:53,705 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:53,705 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:53,705 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) [2021-06-04 21:50:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:53,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:53,709 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] [2021-06-04 21:50:53,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:50:53,910 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash -77664338, now seen corresponding path program 423 times [2021-06-04 21:50:53,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:53,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663741294] [2021-06-04 21:50:53,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:54,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:54,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663741294] [2021-06-04 21:50:54,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663741294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:54,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414026140] [2021-06-04 21:50:54,220 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 [2021-06-04 21:50:54,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:50:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:54,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-04 21:50:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:54,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414026140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:54,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:54,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:54,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424960346] [2021-06-04 21:50:54,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:54,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:54,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:54,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:54,533 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:55,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:55,853 INFO L93 Difference]: Finished difference Result 7146 states and 19197 transitions. [2021-06-04 21:50:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:50:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:50:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:55,860 INFO L225 Difference]: With dead ends: 7146 [2021-06-04 21:50:55,861 INFO L226 Difference]: Without dead ends: 6876 [2021-06-04 21:50:55,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 1298.1ms TimeCoverageRelationStatistics Valid=2002, Invalid=6370, Unknown=0, NotChecked=0, Total=8372 [2021-06-04 21:50:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-04 21:50:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5753. [2021-06-04 21:50:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:55,926 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:55,926 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:55,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:55,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:55,930 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] [2021-06-04 21:50:56,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-04 21:50:56,131 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:56,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:56,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1956992228, now seen corresponding path program 424 times [2021-06-04 21:50:56,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:56,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526456997] [2021-06-04 21:50:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:56,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526456997] [2021-06-04 21:50:56,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526456997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:56,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339516947] [2021-06-04 21:50:56,440 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 [2021-06-04 21:50:56,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:50:56,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:56,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:56,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339516947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:56,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:56,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:50:56,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607456382] [2021-06-04 21:50:56,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:50:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:50:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=969, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:50:56,721 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:50:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:50:57,875 INFO L93 Difference]: Finished difference Result 7096 states and 19097 transitions. [2021-06-04 21:50:57,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:50:57,875 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 [2021-06-04 21:50:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:50:57,883 INFO L225 Difference]: With dead ends: 7096 [2021-06-04 21:50:57,883 INFO L226 Difference]: Without dead ends: 6826 [2021-06-04 21:50:57,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 1131.4ms TimeCoverageRelationStatistics Valid=2298, Invalid=6074, Unknown=0, NotChecked=0, Total=8372 [2021-06-04 21:50:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-04 21:50:57,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5753. [2021-06-04 21:50:57,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:50:57,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:50:57,945 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:50:57,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:50:57,945 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:50:57,946 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) [2021-06-04 21:50:57,946 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:50:57,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:50:57,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:50:57,950 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] [2021-06-04 21:50:58,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-04 21:50:58,150 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:50:58,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:50:58,150 INFO L82 PathProgramCache]: Analyzing trace with hash 73327084, now seen corresponding path program 425 times [2021-06-04 21:50:58,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:50:58,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622423778] [2021-06-04 21:50:58,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:50:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:50:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:58,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:50:58,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622423778] [2021-06-04 21:50:58,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622423778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:58,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035211520] [2021-06-04 21:50:58,464 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 [2021-06-04 21:50:58,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-04 21:50:58,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:50:58,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:50:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:50:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:50:58,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035211520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:50:58,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:50:58,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:50:58,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381012010] [2021-06-04 21:50:58,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:50:58,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:50:58,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:50:58,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1038, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:50:58,741 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:00,097 INFO L93 Difference]: Finished difference Result 7046 states and 18997 transitions. [2021-06-04 21:51:00,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:51:00,097 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:00,104 INFO L225 Difference]: With dead ends: 7046 [2021-06-04 21:51:00,104 INFO L226 Difference]: Without dead ends: 6776 [2021-06-04 21:51:00,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1346.3ms TimeCoverageRelationStatistics Valid=2341, Invalid=6401, Unknown=0, NotChecked=0, Total=8742 [2021-06-04 21:51:00,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-04 21:51:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5753. [2021-06-04 21:51:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:51:00,162 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:51:00,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:00,163 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:51:00,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:00,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:51:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:00,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:00,167 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] [2021-06-04 21:51:00,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-04 21:51:00,368 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash 687566554, now seen corresponding path program 426 times [2021-06-04 21:51:00,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:00,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386098519] [2021-06-04 21:51:00,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:00,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:00,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386098519] [2021-06-04 21:51:00,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386098519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:00,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379822513] [2021-06-04 21:51:00,711 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 [2021-06-04 21:51:00,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-04 21:51:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:51:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:00,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379822513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:00,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:00,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:00,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235512374] [2021-06-04 21:51:00,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:00,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:00,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:00,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:00,976 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 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) [2021-06-04 21:51:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:02,137 INFO L93 Difference]: Finished difference Result 6996 states and 18897 transitions. [2021-06-04 21:51:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:51:02,137 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 [2021-06-04 21:51:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:02,143 INFO L225 Difference]: With dead ends: 6996 [2021-06-04 21:51:02,143 INFO L226 Difference]: Without dead ends: 6726 [2021-06-04 21:51:02,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1192.0ms TimeCoverageRelationStatistics Valid=2483, Invalid=6259, Unknown=0, NotChecked=0, Total=8742 [2021-06-04 21:51:02,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-04 21:51:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5753. [2021-06-04 21:51:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.8308414464534075) internal successors, (16283), 5752 states have internal predecessors, (16283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16283 transitions. [2021-06-04 21:51:02,196 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16283 transitions. Word has length 175 [2021-06-04 21:51:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:02,196 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16283 transitions. [2021-06-04 21:51:02,196 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) [2021-06-04 21:51:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16283 transitions. [2021-06-04 21:51:02,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:02,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:02,200 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] [2021-06-04 21:51:02,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:02,401 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:02,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:02,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1027675734, now seen corresponding path program 427 times [2021-06-04 21:51:02,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:02,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108383437] [2021-06-04 21:51:02,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:02,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:02,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:02,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108383437] [2021-06-04 21:51:02,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108383437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:02,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724886807] [2021-06-04 21:51:02,706 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 [2021-06-04 21:51:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-04 21:51:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:02,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724886807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:02,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:02,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-04 21:51:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336977620] [2021-06-04 21:51:02,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:02,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:02,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:02,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1017, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:02,990 INFO L87 Difference]: Start difference. First operand 5753 states and 16283 transitions. Second operand has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:04,436 INFO L93 Difference]: Finished difference Result 7006 states and 18947 transitions. [2021-06-04 21:51:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:51:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:04,443 INFO L225 Difference]: With dead ends: 7006 [2021-06-04 21:51:04,443 INFO L226 Difference]: Without dead ends: 6736 [2021-06-04 21:51:04,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1423.3ms TimeCoverageRelationStatistics Valid=2528, Invalid=6592, Unknown=0, NotChecked=0, Total=9120 [2021-06-04 21:51:04,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6736 states. [2021-06-04 21:51:04,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6736 to 5753. [2021-06-04 21:51:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 5752 states have (on average 2.831710709318498) internal successors, (16288), 5752 states have internal predecessors, (16288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 16288 transitions. [2021-06-04 21:51:04,500 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 16288 transitions. Word has length 175 [2021-06-04 21:51:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:04,500 INFO L482 AbstractCegarLoop]: Abstraction has 5753 states and 16288 transitions. [2021-06-04 21:51:04,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.972222222222222) internal successors, (179), 36 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 16288 transitions. [2021-06-04 21:51:04,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:04,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:04,504 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] [2021-06-04 21:51:04,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-04 21:51:04,705 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:04,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:04,705 INFO L82 PathProgramCache]: Analyzing trace with hash -2060323336, now seen corresponding path program 428 times [2021-06-04 21:51:04,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:04,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172331211] [2021-06-04 21:51:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:04,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:05,010 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:05,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:05,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172331211] [2021-06-04 21:51:05,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172331211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:05,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292778421] [2021-06-04 21:51:05,011 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 [2021-06-04 21:51:05,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:05,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:05,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:05,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:05,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292778421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:05,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:05,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:05,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127504460] [2021-06-04 21:51:05,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:05,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:05,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:05,264 INFO L87 Difference]: Start difference. First operand 5753 states and 16288 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) [2021-06-04 21:51:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:06,543 INFO L93 Difference]: Finished difference Result 7748 states and 21071 transitions. [2021-06-04 21:51:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:51:06,543 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 [2021-06-04 21:51:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:06,549 INFO L225 Difference]: With dead ends: 7748 [2021-06-04 21:51:06,549 INFO L226 Difference]: Without dead ends: 7478 [2021-06-04 21:51:06,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 1247.0ms TimeCoverageRelationStatistics Valid=2685, Invalid=6435, Unknown=0, NotChecked=0, Total=9120 [2021-06-04 21:51:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2021-06-04 21:51:06,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5933. [2021-06-04 21:51:06,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5933 states, 5932 states have (on average 2.8400202292650034) internal successors, (16847), 5932 states have internal predecessors, (16847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5933 states to 5933 states and 16847 transitions. [2021-06-04 21:51:06,608 INFO L78 Accepts]: Start accepts. Automaton has 5933 states and 16847 transitions. Word has length 175 [2021-06-04 21:51:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:06,608 INFO L482 AbstractCegarLoop]: Abstraction has 5933 states and 16847 transitions. [2021-06-04 21:51:06,608 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) [2021-06-04 21:51:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5933 states and 16847 transitions. [2021-06-04 21:51:06,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-04 21:51:06,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:06,612 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] [2021-06-04 21:51:06,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-04 21:51:06,813 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:06,813 INFO L82 PathProgramCache]: Analyzing trace with hash -2037980086, now seen corresponding path program 429 times [2021-06-04 21:51:06,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:06,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203318427] [2021-06-04 21:51:06,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:07,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:07,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203318427] [2021-06-04 21:51:07,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203318427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:07,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218608416] [2021-06-04 21:51:07,124 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 [2021-06-04 21:51:07,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-04 21:51:07,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:07,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:07,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:07,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218608416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:07,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:07,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-04 21:51:07,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602107816] [2021-06-04 21:51:07,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-04 21:51:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-04 21:51:07,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2021-06-04 21:51:07,398 INFO L87 Difference]: Start difference. First operand 5933 states and 16847 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) [2021-06-04 21:51:08,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:08,756 INFO L93 Difference]: Finished difference Result 7210 states and 19721 transitions. [2021-06-04 21:51:08,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:51:08,757 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 [2021-06-04 21:51:08,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:08,764 INFO L225 Difference]: With dead ends: 7210 [2021-06-04 21:51:08,764 INFO L226 Difference]: Without dead ends: 6721 [2021-06-04 21:51:08,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 1336.1ms TimeCoverageRelationStatistics Valid=2422, Invalid=6890, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:51:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6721 states. [2021-06-04 21:51:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6721 to 5878. [2021-06-04 21:51:08,829 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) [2021-06-04 21:51:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-04 21:51:08,836 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-04 21:51:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:08,837 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-04 21:51:08,837 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) [2021-06-04 21:51:08,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-04 21:51:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:08,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:08,841 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] [2021-06-04 21:51:09,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-04 21:51:09,041 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:09,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1789996418, now seen corresponding path program 430 times [2021-06-04 21:51:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:09,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545827518] [2021-06-04 21:51:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:09,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:09,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:09,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545827518] [2021-06-04 21:51:09,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545827518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:09,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956822657] [2021-06-04 21:51:09,415 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 [2021-06-04 21:51:09,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:09,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:09,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:51:09,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:09,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956822657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:09,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:09,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 39 [2021-06-04 21:51:09,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715630151] [2021-06-04 21:51:09,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:51:09,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:09,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:51:09,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:51:09,733 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:10,498 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-04 21:51:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:51:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:10,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:10,506 INFO L225 Difference]: With dead ends: 7268 [2021-06-04 21:51:10,507 INFO L226 Difference]: Without dead ends: 6934 [2021-06-04 21:51:10,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 941.3ms TimeCoverageRelationStatistics Valid=1538, Invalid=4012, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:51:10,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-04 21:51:10,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-04 21:51:10,559 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) [2021-06-04 21:51:10,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-04 21:51:10,567 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-04 21:51:10,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:10,567 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-04 21:51:10,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 5.384615384615385) internal successors, (210), 39 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-04 21:51:10,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:10,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:10,571 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] [2021-06-04 21:51:10,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:10,772 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:10,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:10,772 INFO L82 PathProgramCache]: Analyzing trace with hash 308357446, now seen corresponding path program 431 times [2021-06-04 21:51:10,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:10,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631124152] [2021-06-04 21:51:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:11,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:11,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631124152] [2021-06-04 21:51:11,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631124152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:11,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93828440] [2021-06-04 21:51:11,189 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 [2021-06-04 21:51:11,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:11,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:11,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93828440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:11,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:11,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450748046] [2021-06-04 21:51:11,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:11,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:11,490 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 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) [2021-06-04 21:51:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:12,138 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-04 21:51:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-04 21:51:12,139 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 [2021-06-04 21:51:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:12,147 INFO L225 Difference]: With dead ends: 8561 [2021-06-04 21:51:12,147 INFO L226 Difference]: Without dead ends: 8291 [2021-06-04 21:51:12,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 868.3ms TimeCoverageRelationStatistics Valid=1335, Invalid=3357, Unknown=0, NotChecked=0, Total=4692 [2021-06-04 21:51:12,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-04 21:51:12,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-04 21:51:12,203 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) [2021-06-04 21:51:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:12,210 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:12,210 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:12,210 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) [2021-06-04 21:51:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:12,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:12,215 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] [2021-06-04 21:51:12,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-04 21:51:12,415 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:12,419 INFO L82 PathProgramCache]: Analyzing trace with hash -839634922, now seen corresponding path program 432 times [2021-06-04 21:51:12,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:12,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984523893] [2021-06-04 21:51:12,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:12,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:12,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984523893] [2021-06-04 21:51:12,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984523893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:12,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279831670] [2021-06-04 21:51:12,829 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 [2021-06-04 21:51:12,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:12,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:12,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:12,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:13,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279831670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:13,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:13,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:13,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094133749] [2021-06-04 21:51:13,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:13,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:13,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:13,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:13,150 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:13,923 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-04 21:51:13,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:51:13,923 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:13,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:13,931 INFO L225 Difference]: With dead ends: 8446 [2021-06-04 21:51:13,931 INFO L226 Difference]: Without dead ends: 8176 [2021-06-04 21:51:13,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 960.4ms TimeCoverageRelationStatistics Valid=1424, Invalid=3832, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:51:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-04 21:51:13,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-04 21:51:13,987 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) [2021-06-04 21:51:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:13,994 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:13,995 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:13,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:13,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:13,999 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] [2021-06-04 21:51:14,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:14,199 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:14,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:14,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1590602500, now seen corresponding path program 433 times [2021-06-04 21:51:14,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:14,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242218075] [2021-06-04 21:51:14,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:14,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242218075] [2021-06-04 21:51:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242218075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754205540] [2021-06-04 21:51:14,618 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 [2021-06-04 21:51:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:14,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754205540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:14,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:14,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:14,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414508231] [2021-06-04 21:51:14,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:14,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:14,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:14,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:14,904 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) [2021-06-04 21:51:15,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:15,679 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-04 21:51:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-04 21:51:15,679 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 [2021-06-04 21:51:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:15,686 INFO L225 Difference]: With dead ends: 8421 [2021-06-04 21:51:15,686 INFO L226 Difference]: Without dead ends: 8151 [2021-06-04 21:51:15,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 935.8ms TimeCoverageRelationStatistics Valid=1329, Invalid=3641, Unknown=0, NotChecked=0, Total=4970 [2021-06-04 21:51:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-04 21:51:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-04 21:51:15,736 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) [2021-06-04 21:51:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:15,744 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:15,744 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:15,744 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) [2021-06-04 21:51:15,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:15,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:15,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:15,749 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] [2021-06-04 21:51:15,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-04 21:51:15,949 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:15,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2006649388, now seen corresponding path program 434 times [2021-06-04 21:51:15,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:15,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427714981] [2021-06-04 21:51:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:16,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427714981] [2021-06-04 21:51:16,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427714981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:16,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464017698] [2021-06-04 21:51:16,341 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 [2021-06-04 21:51:16,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:16,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:16,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:16,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464017698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:16,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:16,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:16,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424421227] [2021-06-04 21:51:16,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:16,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:16,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:16,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:16,647 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:17,452 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-04 21:51:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:51:17,453 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:17,461 INFO L225 Difference]: With dead ends: 8371 [2021-06-04 21:51:17,461 INFO L226 Difference]: Without dead ends: 8101 [2021-06-04 21:51:17,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 978.3ms TimeCoverageRelationStatistics Valid=1426, Invalid=4124, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:51:17,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-04 21:51:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-04 21:51:17,518 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) [2021-06-04 21:51:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:17,525 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:17,525 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:17,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:17,525 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:17,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:17,529 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] [2021-06-04 21:51:17,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-04 21:51:17,730 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash 568435266, now seen corresponding path program 435 times [2021-06-04 21:51:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:17,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783833477] [2021-06-04 21:51:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:18,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783833477] [2021-06-04 21:51:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783833477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575401189] [2021-06-04 21:51:18,171 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 [2021-06-04 21:51:18,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:18,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:18,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:18,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575401189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:18,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:18,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:18,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36577881] [2021-06-04 21:51:18,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:18,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:18,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:18,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:18,487 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) [2021-06-04 21:51:19,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:19,244 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-04 21:51:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:51:19,244 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 [2021-06-04 21:51:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:19,252 INFO L225 Difference]: With dead ends: 8321 [2021-06-04 21:51:19,252 INFO L226 Difference]: Without dead ends: 8051 [2021-06-04 21:51:19,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 968.0ms TimeCoverageRelationStatistics Valid=1339, Invalid=3917, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:51:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-04 21:51:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-04 21:51:19,308 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) [2021-06-04 21:51:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:19,315 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:19,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:19,315 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:19,315 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) [2021-06-04 21:51:19,315 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:19,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:19,320 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] [2021-06-04 21:51:19,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-04 21:51:19,520 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 67121426, now seen corresponding path program 436 times [2021-06-04 21:51:19,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632293002] [2021-06-04 21:51:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:19,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:19,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632293002] [2021-06-04 21:51:19,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632293002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:19,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484472506] [2021-06-04 21:51:19,900 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 [2021-06-04 21:51:19,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:19,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:19,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:19,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:20,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484472506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:20,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:20,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:20,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448874929] [2021-06-04 21:51:20,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:20,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:20,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:20,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:20,223 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:21,195 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-04 21:51:21,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:51:21,196 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:21,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:21,204 INFO L225 Difference]: With dead ends: 8271 [2021-06-04 21:51:21,204 INFO L226 Difference]: Without dead ends: 8001 [2021-06-04 21:51:21,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1072.7ms TimeCoverageRelationStatistics Valid=1444, Invalid=4408, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:51:21,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-04 21:51:21,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-04 21:51:21,260 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) [2021-06-04 21:51:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:21,268 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:21,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:21,268 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:21,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:21,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:21,272 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:21,272 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] [2021-06-04 21:51:21,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-04 21:51:21,473 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:21,473 INFO L82 PathProgramCache]: Analyzing trace with hash 543616768, now seen corresponding path program 437 times [2021-06-04 21:51:21,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:21,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446959393] [2021-06-04 21:51:21,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:21,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:21,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446959393] [2021-06-04 21:51:21,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446959393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:21,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271140542] [2021-06-04 21:51:21,850 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 [2021-06-04 21:51:21,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:21,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:22,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271140542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:22,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:22,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:22,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404827579] [2021-06-04 21:51:22,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:22,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:22,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:22,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:22,156 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) [2021-06-04 21:51:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:22,972 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-04 21:51:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:51:22,973 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 [2021-06-04 21:51:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:22,980 INFO L225 Difference]: With dead ends: 8221 [2021-06-04 21:51:22,980 INFO L226 Difference]: Without dead ends: 7951 [2021-06-04 21:51:22,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 952.1ms TimeCoverageRelationStatistics Valid=1365, Invalid=4185, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:51:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-04 21:51:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-04 21:51:23,037 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) [2021-06-04 21:51:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:23,045 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:23,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:23,045 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:23,045 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) [2021-06-04 21:51:23,045 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:23,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:23,050 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] [2021-06-04 21:51:23,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-04 21:51:23,262 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:23,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:23,263 INFO L82 PathProgramCache]: Analyzing trace with hash 2010300880, now seen corresponding path program 438 times [2021-06-04 21:51:23,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:23,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675860134] [2021-06-04 21:51:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:23,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:23,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675860134] [2021-06-04 21:51:23,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675860134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:23,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384465834] [2021-06-04 21:51:23,630 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 [2021-06-04 21:51:23,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:23,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:23,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:23,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384465834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219387951] [2021-06-04 21:51:23,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:23,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:23,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:23,946 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:24,870 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-04 21:51:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:51:24,870 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:24,878 INFO L225 Difference]: With dead ends: 8171 [2021-06-04 21:51:24,878 INFO L226 Difference]: Without dead ends: 7901 [2021-06-04 21:51:24,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1259 ImplicationChecksByTransitivity, 1058.8ms TimeCoverageRelationStatistics Valid=1478, Invalid=4684, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:51:24,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-04 21:51:24,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-04 21:51:24,963 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) [2021-06-04 21:51:24,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:24,971 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:24,971 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:24,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:24,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:24,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:24,976 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] [2021-06-04 21:51:25,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:25,177 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:25,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1875079486, now seen corresponding path program 439 times [2021-06-04 21:51:25,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:25,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749897364] [2021-06-04 21:51:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:25,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749897364] [2021-06-04 21:51:25,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749897364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:25,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782056029] [2021-06-04 21:51:25,525 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 [2021-06-04 21:51:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:25,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:25,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782056029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:25,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:25,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:25,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849416075] [2021-06-04 21:51:25,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:25,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:25,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:25,812 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) [2021-06-04 21:51:26,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:26,670 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-04 21:51:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:51:26,671 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 [2021-06-04 21:51:26,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:26,679 INFO L225 Difference]: With dead ends: 8121 [2021-06-04 21:51:26,679 INFO L226 Difference]: Without dead ends: 7851 [2021-06-04 21:51:26,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 959.5ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:51:26,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-04 21:51:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-04 21:51:26,734 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) [2021-06-04 21:51:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:26,743 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:26,743 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:26,743 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) [2021-06-04 21:51:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:26,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:26,748 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] [2021-06-04 21:51:26,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-04 21:51:26,957 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:26,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:26,957 INFO L82 PathProgramCache]: Analyzing trace with hash 998344718, now seen corresponding path program 440 times [2021-06-04 21:51:26,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:26,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727381203] [2021-06-04 21:51:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:27,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:27,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727381203] [2021-06-04 21:51:27,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727381203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:27,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156258741] [2021-06-04 21:51:27,349 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 [2021-06-04 21:51:27,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:27,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:27,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156258741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:27,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:27,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:27,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789533961] [2021-06-04 21:51:27,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:27,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:27,692 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:28,688 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-04 21:51:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:51:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:28,697 INFO L225 Difference]: With dead ends: 8071 [2021-06-04 21:51:28,697 INFO L226 Difference]: Without dead ends: 7801 [2021-06-04 21:51:28,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1125.4ms TimeCoverageRelationStatistics Valid=1528, Invalid=4952, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:51:28,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-04 21:51:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-04 21:51:28,749 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) [2021-06-04 21:51:28,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:28,756 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:28,756 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:28,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:28,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:28,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:28,761 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] [2021-06-04 21:51:28,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-04 21:51:28,961 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:28,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:28,961 INFO L82 PathProgramCache]: Analyzing trace with hash -738981636, now seen corresponding path program 441 times [2021-06-04 21:51:28,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:28,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063411451] [2021-06-04 21:51:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:29,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063411451] [2021-06-04 21:51:29,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063411451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:29,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152805784] [2021-06-04 21:51:29,298 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 [2021-06-04 21:51:29,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:29,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:29,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-04 21:51:29,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:29,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152805784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595724823] [2021-06-04 21:51:29,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:29,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:29,590 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) [2021-06-04 21:51:30,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:30,477 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-04 21:51:30,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:51:30,477 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 [2021-06-04 21:51:30,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:30,485 INFO L225 Difference]: With dead ends: 8021 [2021-06-04 21:51:30,485 INFO L226 Difference]: Without dead ends: 7751 [2021-06-04 21:51:30,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 970.4ms TimeCoverageRelationStatistics Valid=1465, Invalid=4697, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:51:30,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-04 21:51:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-04 21:51:30,538 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) [2021-06-04 21:51:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:30,546 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:30,546 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:30,546 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) [2021-06-04 21:51:30,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:30,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:30,550 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] [2021-06-04 21:51:30,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-04 21:51:30,751 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 625566668, now seen corresponding path program 442 times [2021-06-04 21:51:30,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:30,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088163431] [2021-06-04 21:51:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:31,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088163431] [2021-06-04 21:51:31,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088163431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879169829] [2021-06-04 21:51:31,104 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 [2021-06-04 21:51:31,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:31,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:31,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:31,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:31,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879169829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:31,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:31,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:31,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519547425] [2021-06-04 21:51:31,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:31,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:31,398 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:32,465 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-04 21:51:32,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:51:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:32,473 INFO L225 Difference]: With dead ends: 7971 [2021-06-04 21:51:32,473 INFO L226 Difference]: Without dead ends: 7701 [2021-06-04 21:51:32,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1495 ImplicationChecksByTransitivity, 1158.3ms TimeCoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:51:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-04 21:51:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-04 21:51:32,523 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) [2021-06-04 21:51:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:32,531 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:32,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:32,531 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:32,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:32,531 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:32,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:32,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:32,535 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] [2021-06-04 21:51:32,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:32,736 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1651665350, now seen corresponding path program 443 times [2021-06-04 21:51:32,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:32,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275926751] [2021-06-04 21:51:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:32,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:33,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:33,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275926751] [2021-06-04 21:51:33,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275926751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:33,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347496452] [2021-06-04 21:51:33,069 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 [2021-06-04 21:51:33,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:33,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:33,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:33,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:33,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347496452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:33,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:33,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:33,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727190022] [2021-06-04 21:51:33,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:33,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:33,349 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) [2021-06-04 21:51:34,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:34,265 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-04 21:51:34,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:51:34,266 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 [2021-06-04 21:51:34,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:34,273 INFO L225 Difference]: With dead ends: 7921 [2021-06-04 21:51:34,273 INFO L226 Difference]: Without dead ends: 7651 [2021-06-04 21:51:34,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 994.2ms TimeCoverageRelationStatistics Valid=1539, Invalid=4941, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:51:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-04 21:51:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-04 21:51:34,345 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) [2021-06-04 21:51:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:34,352 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:34,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:34,352 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:34,352 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) [2021-06-04 21:51:34,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:34,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:34,357 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] [2021-06-04 21:51:34,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:34,570 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:34,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1744778506, now seen corresponding path program 444 times [2021-06-04 21:51:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:34,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633247455] [2021-06-04 21:51:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:34,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:34,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633247455] [2021-06-04 21:51:34,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633247455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:34,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868627141] [2021-06-04 21:51:34,910 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 [2021-06-04 21:51:34,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:35,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868627141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121069900] [2021-06-04 21:51:35,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:35,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:35,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:35,222 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:36,365 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-04 21:51:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:51:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:36,374 INFO L225 Difference]: With dead ends: 7871 [2021-06-04 21:51:36,374 INFO L226 Difference]: Without dead ends: 7601 [2021-06-04 21:51:36,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1196.6ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:51:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-04 21:51:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-04 21:51:36,429 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) [2021-06-04 21:51:36,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:36,437 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:36,437 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:36,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:36,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:36,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:36,441 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] [2021-06-04 21:51:36,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-04 21:51:36,642 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:36,642 INFO L82 PathProgramCache]: Analyzing trace with hash 129825016, now seen corresponding path program 445 times [2021-06-04 21:51:36,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:36,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180810260] [2021-06-04 21:51:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:37,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180810260] [2021-06-04 21:51:37,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180810260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:37,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349629698] [2021-06-04 21:51:37,023 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 [2021-06-04 21:51:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:37,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:37,311 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:37,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349629698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:37,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:37,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:37,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876239843] [2021-06-04 21:51:37,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:37,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:37,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:37,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:37,312 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) [2021-06-04 21:51:38,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:38,320 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-04 21:51:38,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:51:38,321 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 [2021-06-04 21:51:38,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:38,328 INFO L225 Difference]: With dead ends: 7821 [2021-06-04 21:51:38,328 INFO L226 Difference]: Without dead ends: 7551 [2021-06-04 21:51:38,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 1108.6ms TimeCoverageRelationStatistics Valid=1629, Invalid=5177, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:51:38,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-04 21:51:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-04 21:51:38,382 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) [2021-06-04 21:51:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:38,390 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:38,390 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:38,390 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) [2021-06-04 21:51:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:38,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:38,395 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] [2021-06-04 21:51:38,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:38,595 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:38,595 INFO L82 PathProgramCache]: Analyzing trace with hash -250618936, now seen corresponding path program 446 times [2021-06-04 21:51:38,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:38,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170178983] [2021-06-04 21:51:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:38,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170178983] [2021-06-04 21:51:38,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170178983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:38,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176874590] [2021-06-04 21:51:38,940 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 [2021-06-04 21:51:39,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:39,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176874590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:39,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:39,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:39,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849122518] [2021-06-04 21:51:39,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:39,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:39,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:39,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:39,254 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:40,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:40,485 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-04 21:51:40,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:51:40,485 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:40,493 INFO L225 Difference]: With dead ends: 7771 [2021-06-04 21:51:40,493 INFO L226 Difference]: Without dead ends: 7501 [2021-06-04 21:51:40,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1237.9ms TimeCoverageRelationStatistics Valid=1774, Invalid=5708, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:51:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-04 21:51:40,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-04 21:51:40,545 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) [2021-06-04 21:51:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:40,552 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:40,553 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:40,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:40,553 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:40,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:40,557 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] [2021-06-04 21:51:40,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:40,757 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:40,757 INFO L82 PathProgramCache]: Analyzing trace with hash 373756214, now seen corresponding path program 447 times [2021-06-04 21:51:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:40,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366631249] [2021-06-04 21:51:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:41,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:41,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366631249] [2021-06-04 21:51:41,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366631249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:41,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957417468] [2021-06-04 21:51:41,086 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 [2021-06-04 21:51:41,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:41,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-04 21:51:41,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:41,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957417468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:41,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:41,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:41,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100081348] [2021-06-04 21:51:41,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:41,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:41,375 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) [2021-06-04 21:51:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:42,449 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-04 21:51:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:51:42,450 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 [2021-06-04 21:51:42,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:42,457 INFO L225 Difference]: With dead ends: 7721 [2021-06-04 21:51:42,457 INFO L226 Difference]: Without dead ends: 7451 [2021-06-04 21:51:42,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1083.5ms TimeCoverageRelationStatistics Valid=1735, Invalid=5405, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:51:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-04 21:51:42,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-04 21:51:42,514 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) [2021-06-04 21:51:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:42,521 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:42,521 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:42,522 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) [2021-06-04 21:51:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:42,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:42,526 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] [2021-06-04 21:51:42,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-04 21:51:42,726 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:42,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1182808070, now seen corresponding path program 448 times [2021-06-04 21:51:42,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:42,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188259454] [2021-06-04 21:51:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:43,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:43,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188259454] [2021-06-04 21:51:43,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188259454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:43,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890576251] [2021-06-04 21:51:43,053 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 [2021-06-04 21:51:43,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:43,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:43,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:43,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890576251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:43,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:43,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:43,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410975227] [2021-06-04 21:51:43,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:43,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:43,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:43,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:43,343 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:44,661 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-04 21:51:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:51:44,661 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:44,668 INFO L225 Difference]: With dead ends: 7671 [2021-06-04 21:51:44,668 INFO L226 Difference]: Without dead ends: 7401 [2021-06-04 21:51:44,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1299.6ms TimeCoverageRelationStatistics Valid=1888, Invalid=5944, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:51:44,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-04 21:51:44,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-04 21:51:44,719 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) [2021-06-04 21:51:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:44,727 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:44,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:44,727 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:44,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:44,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:44,732 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] [2021-06-04 21:51:44,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-04 21:51:44,932 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:44,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:44,932 INFO L82 PathProgramCache]: Analyzing trace with hash -209142028, now seen corresponding path program 449 times [2021-06-04 21:51:44,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:44,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003597421] [2021-06-04 21:51:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:45,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003597421] [2021-06-04 21:51:45,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003597421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:45,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880190694] [2021-06-04 21:51:45,250 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 [2021-06-04 21:51:45,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:45,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:45,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880190694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275529635] [2021-06-04 21:51:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:45,530 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) [2021-06-04 21:51:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:46,664 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-04 21:51:46,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:51:46,665 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 [2021-06-04 21:51:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:46,671 INFO L225 Difference]: With dead ends: 7621 [2021-06-04 21:51:46,671 INFO L226 Difference]: Without dead ends: 7351 [2021-06-04 21:51:46,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1843 ImplicationChecksByTransitivity, 1115.4ms TimeCoverageRelationStatistics Valid=1857, Invalid=5625, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:51:46,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-04 21:51:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-04 21:51:46,723 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) [2021-06-04 21:51:46,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:46,731 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:46,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:46,731 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:46,731 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) [2021-06-04 21:51:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:46,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:46,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:46,735 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] [2021-06-04 21:51:46,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:46,936 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:46,936 INFO L82 PathProgramCache]: Analyzing trace with hash -454219324, now seen corresponding path program 450 times [2021-06-04 21:51:46,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:46,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942000094] [2021-06-04 21:51:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:47,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942000094] [2021-06-04 21:51:47,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942000094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:47,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463715752] [2021-06-04 21:51:47,268 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 [2021-06-04 21:51:47,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:51:47,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:47,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-04 21:51:47,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:47,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463715752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:47,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:47,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:47,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083295219] [2021-06-04 21:51:47,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:47,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:47,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:47,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:47,563 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:48,839 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-04 21:51:48,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:51:48,839 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:48,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:48,845 INFO L225 Difference]: With dead ends: 7571 [2021-06-04 21:51:48,845 INFO L226 Difference]: Without dead ends: 7301 [2021-06-04 21:51:48,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 1271.4ms TimeCoverageRelationStatistics Valid=1780, Invalid=6052, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:51:48,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-04 21:51:48,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-04 21:51:48,895 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) [2021-06-04 21:51:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:48,902 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:48,903 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:48,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:48,903 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:48,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:48,907 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] [2021-06-04 21:51:49,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-04 21:51:49,107 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -831069646, now seen corresponding path program 451 times [2021-06-04 21:51:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:49,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780798610] [2021-06-04 21:51:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:49,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:49,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780798610] [2021-06-04 21:51:49,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780798610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:49,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887256608] [2021-06-04 21:51:49,427 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 [2021-06-04 21:51:49,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:49,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:49,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:49,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887256608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:49,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:49,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:49,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676722760] [2021-06-04 21:51:49,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:49,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:49,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:49,694 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) [2021-06-04 21:51:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:50,846 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-04 21:51:50,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:51:50,847 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 [2021-06-04 21:51:50,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:50,854 INFO L225 Difference]: With dead ends: 7521 [2021-06-04 21:51:50,854 INFO L226 Difference]: Without dead ends: 7251 [2021-06-04 21:51:50,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1976 ImplicationChecksByTransitivity, 1144.5ms TimeCoverageRelationStatistics Valid=1995, Invalid=5837, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:51:50,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-04 21:51:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-04 21:51:50,927 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) [2021-06-04 21:51:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:50,934 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:50,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:50,934 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:50,934 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) [2021-06-04 21:51:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:50,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:50,938 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] [2021-06-04 21:51:51,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-04 21:51:51,139 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:51,139 INFO L82 PathProgramCache]: Analyzing trace with hash 495685890, now seen corresponding path program 452 times [2021-06-04 21:51:51,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:51,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536886963] [2021-06-04 21:51:51,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:51,460 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:51,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:51,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536886963] [2021-06-04 21:51:51,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536886963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:51,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478272997] [2021-06-04 21:51:51,461 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 [2021-06-04 21:51:51,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:51:51,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:51,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:51,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478272997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:51,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:51,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808524940] [2021-06-04 21:51:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:51,741 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:53,177 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-04 21:51:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:51:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:53,185 INFO L225 Difference]: With dead ends: 7471 [2021-06-04 21:51:53,185 INFO L226 Difference]: Without dead ends: 7201 [2021-06-04 21:51:53,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1375.8ms TimeCoverageRelationStatistics Valid=2164, Invalid=6392, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:51:53,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-04 21:51:53,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-04 21:51:53,236 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) [2021-06-04 21:51:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:53,243 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:53,243 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:53,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:53,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:53,273 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] [2021-06-04 21:51:53,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:53,474 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:53,474 INFO L82 PathProgramCache]: Analyzing trace with hash 949902064, now seen corresponding path program 453 times [2021-06-04 21:51:53,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:53,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272811451] [2021-06-04 21:51:53,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:53,787 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:53,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272811451] [2021-06-04 21:51:53,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272811451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:53,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763451783] [2021-06-04 21:51:53,788 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 [2021-06-04 21:51:53,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:51:53,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:53,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-04 21:51:53,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:54,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763451783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:54,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:54,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:54,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88724047] [2021-06-04 21:51:54,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:54,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:54,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:54,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:54,065 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) [2021-06-04 21:51:55,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:55,262 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-04 21:51:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:51:55,262 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 [2021-06-04 21:51:55,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:55,270 INFO L225 Difference]: With dead ends: 7421 [2021-06-04 21:51:55,270 INFO L226 Difference]: Without dead ends: 7151 [2021-06-04 21:51:55,271 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1182.6ms TimeCoverageRelationStatistics Valid=2149, Invalid=6041, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:51:55,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-04 21:51:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-04 21:51:55,321 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) [2021-06-04 21:51:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:55,328 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:55,329 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:55,329 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) [2021-06-04 21:51:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:55,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:55,333 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] [2021-06-04 21:51:55,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-04 21:51:55,533 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:55,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1948798400, now seen corresponding path program 454 times [2021-06-04 21:51:55,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:55,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238266662] [2021-06-04 21:51:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:55,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:55,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238266662] [2021-06-04 21:51:55,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238266662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:55,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091722148] [2021-06-04 21:51:55,889 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 [2021-06-04 21:51:55,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:51:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:56,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091722148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:56,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:56,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:51:56,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773723933] [2021-06-04 21:51:56,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:51:56,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:56,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:51:56,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:51:56,177 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:57,646 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-04 21:51:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:51:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:51:57,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:57,654 INFO L225 Difference]: With dead ends: 7371 [2021-06-04 21:51:57,654 INFO L226 Difference]: Without dead ends: 7101 [2021-06-04 21:51:57,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 1473.8ms TimeCoverageRelationStatistics Valid=2326, Invalid=6604, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:51:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-04 21:51:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-04 21:51:57,714 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) [2021-06-04 21:51:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:57,723 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:57,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:57,723 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:57,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:51:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:57,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:57,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:57,728 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] [2021-06-04 21:51:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:51:57,944 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:51:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:51:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash 69470510, now seen corresponding path program 455 times [2021-06-04 21:51:57,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:51:57,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033371001] [2021-06-04 21:51:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:51:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:51:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:58,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:51:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033371001] [2021-06-04 21:51:58,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033371001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:58,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378441702] [2021-06-04 21:51:58,281 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 [2021-06-04 21:51:58,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:51:58,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:51:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:51:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:51:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:51:58,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378441702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:51:58,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:51:58,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:51:58,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799654506] [2021-06-04 21:51:58,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:51:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:51:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:51:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:51:58,579 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) [2021-06-04 21:51:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:51:59,777 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-04 21:51:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:51:59,777 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 [2021-06-04 21:51:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:51:59,784 INFO L225 Difference]: With dead ends: 7321 [2021-06-04 21:51:59,784 INFO L226 Difference]: Without dead ends: 7051 [2021-06-04 21:51:59,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2254 ImplicationChecksByTransitivity, 1212.8ms TimeCoverageRelationStatistics Valid=2319, Invalid=6237, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:51:59,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-04 21:51:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-04 21:51:59,834 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) [2021-06-04 21:51:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:51:59,842 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:51:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:51:59,842 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:51:59,842 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) [2021-06-04 21:51:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:51:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:51:59,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:51:59,846 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] [2021-06-04 21:52:00,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:00,047 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:00,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:00,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2099789822, now seen corresponding path program 456 times [2021-06-04 21:52:00,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:00,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613664502] [2021-06-04 21:52:00,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:00,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613664502] [2021-06-04 21:52:00,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613664502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:00,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380838076] [2021-06-04 21:52:00,361 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 [2021-06-04 21:52:00,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:00,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-04 21:52:00,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:00,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380838076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:00,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:00,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:52:00,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951335631] [2021-06-04 21:52:00,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:00,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:00,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:00,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:00,677 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:02,048 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-04 21:52:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:52:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:52:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:02,056 INFO L225 Difference]: With dead ends: 7271 [2021-06-04 21:52:02,056 INFO L226 Difference]: Without dead ends: 7001 [2021-06-04 21:52:02,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 1348.1ms TimeCoverageRelationStatistics Valid=2158, Invalid=6772, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:52:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-04 21:52:02,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-04 21:52:02,112 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) [2021-06-04 21:52:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:02,120 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:02,120 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:02,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:02,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:02,124 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] [2021-06-04 21:52:02,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:02,325 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1580938004, now seen corresponding path program 457 times [2021-06-04 21:52:02,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:02,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208537976] [2021-06-04 21:52:02,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:02,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208537976] [2021-06-04 21:52:02,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208537976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233077125] [2021-06-04 21:52:02,642 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 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 [2021-06-04 21:52:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:02,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:02,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:02,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233077125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:02,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:02,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004018050] [2021-06-04 21:52:02,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:02,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:02,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:02,931 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) [2021-06-04 21:52:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:04,183 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-04 21:52:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:52:04,183 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 [2021-06-04 21:52:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:04,191 INFO L225 Difference]: With dead ends: 7221 [2021-06-04 21:52:04,191 INFO L226 Difference]: Without dead ends: 6951 [2021-06-04 21:52:04,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1243.6ms TimeCoverageRelationStatistics Valid=2505, Invalid=6425, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:52:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-04 21:52:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-04 21:52:04,244 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) [2021-06-04 21:52:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-04 21:52:04,251 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-04 21:52:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:04,251 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-04 21:52:04,251 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) [2021-06-04 21:52:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-04 21:52:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:04,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:04,256 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] [2021-06-04 21:52:04,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-04 21:52:04,456 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:04,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:04,456 INFO L82 PathProgramCache]: Analyzing trace with hash 998787004, now seen corresponding path program 458 times [2021-06-04 21:52:04,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:04,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300975199] [2021-06-04 21:52:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:04,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:04,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300975199] [2021-06-04 21:52:04,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300975199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:04,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249825420] [2021-06-04 21:52:04,783 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 [2021-06-04 21:52:04,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:04,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:04,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:04,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249825420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:05,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:05,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:52:05,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664894196] [2021-06-04 21:52:05,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:05,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:05,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:05,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:05,066 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:06,806 INFO L93 Difference]: Finished difference Result 7679 states and 20763 transitions. [2021-06-04 21:52:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-04 21:52:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:52:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:06,814 INFO L225 Difference]: With dead ends: 7679 [2021-06-04 21:52:06,814 INFO L226 Difference]: Without dead ends: 7056 [2021-06-04 21:52:06,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=2721, Invalid=7379, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:52:06,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7056 states. [2021-06-04 21:52:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7056 to 5888. [2021-06-04 21:52:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5888 states, 5887 states have (on average 2.8279259385085784) internal successors, (16648), 5887 states have internal predecessors, (16648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5888 states to 5888 states and 16648 transitions. [2021-06-04 21:52:06,885 INFO L78 Accepts]: Start accepts. Automaton has 5888 states and 16648 transitions. Word has length 180 [2021-06-04 21:52:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:06,885 INFO L482 AbstractCegarLoop]: Abstraction has 5888 states and 16648 transitions. [2021-06-04 21:52:06,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 4.972972972972973) internal successors, (184), 37 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5888 states and 16648 transitions. [2021-06-04 21:52:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:06,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:06,890 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] [2021-06-04 21:52:07,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-04 21:52:07,091 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash -33860598, now seen corresponding path program 459 times [2021-06-04 21:52:07,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:07,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272858811] [2021-06-04 21:52:07,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:07,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:07,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272858811] [2021-06-04 21:52:07,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272858811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:07,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140690818] [2021-06-04 21:52:07,413 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 [2021-06-04 21:52:07,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:07,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:07,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:07,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:07,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140690818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:07,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:07,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-04 21:52:07,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709334094] [2021-06-04 21:52:07,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:07,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:07,712 INFO L87 Difference]: Start difference. First operand 5888 states and 16648 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) [2021-06-04 21:52:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:09,113 INFO L93 Difference]: Finished difference Result 7908 states and 21481 transitions. [2021-06-04 21:52:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:52:09,113 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 [2021-06-04 21:52:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:09,121 INFO L225 Difference]: With dead ends: 7908 [2021-06-04 21:52:09,121 INFO L226 Difference]: Without dead ends: 7638 [2021-06-04 21:52:09,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 1327.7ms TimeCoverageRelationStatistics Valid=2708, Invalid=6604, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:52:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7638 states. [2021-06-04 21:52:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7638 to 6068. [2021-06-04 21:52:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6068 states, 6067 states have (on average 2.836162848195154) internal successors, (17207), 6067 states have internal predecessors, (17207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6068 states to 6068 states and 17207 transitions. [2021-06-04 21:52:09,185 INFO L78 Accepts]: Start accepts. Automaton has 6068 states and 17207 transitions. Word has length 180 [2021-06-04 21:52:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:09,185 INFO L482 AbstractCegarLoop]: Abstraction has 6068 states and 17207 transitions. [2021-06-04 21:52:09,185 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) [2021-06-04 21:52:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 6068 states and 17207 transitions. [2021-06-04 21:52:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-04 21:52:09,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:09,189 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] [2021-06-04 21:52:09,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:09,390 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:09,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:09,390 INFO L82 PathProgramCache]: Analyzing trace with hash -11517348, now seen corresponding path program 460 times [2021-06-04 21:52:09,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:09,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496029348] [2021-06-04 21:52:09,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:09,713 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:09,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496029348] [2021-06-04 21:52:09,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496029348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:09,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9811111] [2021-06-04 21:52:09,713 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 [2021-06-04 21:52:09,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:09,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-04 21:52:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:09,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9811111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:09,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:09,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-04 21:52:09,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465447758] [2021-06-04 21:52:09,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:09,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:09,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:09,991 INFO L87 Difference]: Start difference. First operand 6068 states and 17207 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) [2021-06-04 21:52:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:11,697 INFO L93 Difference]: Finished difference Result 7851 states and 21341 transitions. [2021-06-04 21:52:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-04 21:52:11,697 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 [2021-06-04 21:52:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:11,705 INFO L225 Difference]: With dead ends: 7851 [2021-06-04 21:52:11,705 INFO L226 Difference]: Without dead ends: 7276 [2021-06-04 21:52:11,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1612.5ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-04 21:52:11,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-04 21:52:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-04 21:52:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:11,764 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 180 [2021-06-04 21:52:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:11,764 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:11,765 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) [2021-06-04 21:52:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:11,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:11,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:11,769 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] [2021-06-04 21:52:11,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-04 21:52:11,970 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:11,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:11,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1598313859, now seen corresponding path program 461 times [2021-06-04 21:52:11,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:11,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945350671] [2021-06-04 21:52:11,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:12,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:12,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945350671] [2021-06-04 21:52:12,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945350671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:12,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261649221] [2021-06-04 21:52:12,371 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 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 [2021-06-04 21:52:12,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:12,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:12,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:12,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261649221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:12,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:12,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:12,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613643720] [2021-06-04 21:52:12,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:12,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:12,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:12,674 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:13,462 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-04 21:52:13,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-04 21:52:13,462 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 [2021-06-04 21:52:13,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:13,470 INFO L225 Difference]: With dead ends: 7946 [2021-06-04 21:52:13,471 INFO L226 Difference]: Without dead ends: 7676 [2021-06-04 21:52:13,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 904.4ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-04 21:52:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-04 21:52:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-04 21:52:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:13,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:13,540 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:13,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:13,540 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:13,540 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) [2021-06-04 21:52:13,540 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:13,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:13,545 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] [2021-06-04 21:52:13,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-04 21:52:13,745 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash 450321491, now seen corresponding path program 462 times [2021-06-04 21:52:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:13,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29818811] [2021-06-04 21:52:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:14,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29818811] [2021-06-04 21:52:14,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29818811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:14,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534416234] [2021-06-04 21:52:14,166 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 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 [2021-06-04 21:52:14,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:14,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:14,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:14,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:14,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534416234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:14,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:14,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:14,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523363370] [2021-06-04 21:52:14,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:14,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:14,472 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:15,284 INFO L93 Difference]: Finished difference Result 8641 states and 22487 transitions. [2021-06-04 21:52:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:52:15,285 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 [2021-06-04 21:52:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:15,294 INFO L225 Difference]: With dead ends: 8641 [2021-06-04 21:52:15,294 INFO L226 Difference]: Without dead ends: 8371 [2021-06-04 21:52:15,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 987.2ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:52:15,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8371 states. [2021-06-04 21:52:15,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8371 to 6103. [2021-06-04 21:52:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:15,368 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:15,368 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) [2021-06-04 21:52:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:15,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:15,374 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] [2021-06-04 21:52:15,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:15,574 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1414408383, now seen corresponding path program 463 times [2021-06-04 21:52:15,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:15,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276761474] [2021-06-04 21:52:15,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:15,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:15,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276761474] [2021-06-04 21:52:15,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276761474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:15,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292472330] [2021-06-04 21:52:15,967 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 [2021-06-04 21:52:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:16,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:16,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:16,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292472330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:16,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:16,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:16,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230911906] [2021-06-04 21:52:16,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:16,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:16,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:16,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:16,233 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:17,095 INFO L93 Difference]: Finished difference Result 8596 states and 22397 transitions. [2021-06-04 21:52:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:52:17,095 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 [2021-06-04 21:52:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:17,102 INFO L225 Difference]: With dead ends: 8596 [2021-06-04 21:52:17,102 INFO L226 Difference]: Without dead ends: 8326 [2021-06-04 21:52:17,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 923.6ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:52:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-04 21:52:17,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6103. [2021-06-04 21:52:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:17,166 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:17,167 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:17,167 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) [2021-06-04 21:52:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:17,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:17,171 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] [2021-06-04 21:52:17,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:17,372 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:17,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:17,372 INFO L82 PathProgramCache]: Analyzing trace with hash -716692975, now seen corresponding path program 464 times [2021-06-04 21:52:17,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:17,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526141415] [2021-06-04 21:52:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:17,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526141415] [2021-06-04 21:52:17,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526141415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:17,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473624503] [2021-06-04 21:52:17,773 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 [2021-06-04 21:52:17,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:17,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:18,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473624503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:18,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:18,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:18,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036312359] [2021-06-04 21:52:18,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:18,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:18,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:18,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:18,065 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:18,958 INFO L93 Difference]: Finished difference Result 8546 states and 22297 transitions. [2021-06-04 21:52:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:52:18,958 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 [2021-06-04 21:52:18,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:18,967 INFO L225 Difference]: With dead ends: 8546 [2021-06-04 21:52:18,967 INFO L226 Difference]: Without dead ends: 8276 [2021-06-04 21:52:18,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1000.5ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:52:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-04 21:52:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6103. [2021-06-04 21:52:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:19,033 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:19,033 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:19,033 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) [2021-06-04 21:52:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:19,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:19,037 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] [2021-06-04 21:52:19,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:19,238 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:19,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1858391679, now seen corresponding path program 465 times [2021-06-04 21:52:19,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:19,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967169629] [2021-06-04 21:52:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:19,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967169629] [2021-06-04 21:52:19,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967169629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:19,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513649898] [2021-06-04 21:52:19,646 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 [2021-06-04 21:52:19,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 62 conjunts are in the unsatisfiable core [2021-06-04 21:52:19,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:19,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513649898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:19,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:19,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175017775] [2021-06-04 21:52:19,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:19,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:19,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:19,919 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:20,794 INFO L93 Difference]: Finished difference Result 8496 states and 22197 transitions. [2021-06-04 21:52:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:52:20,794 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 [2021-06-04 21:52:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:20,802 INFO L225 Difference]: With dead ends: 8496 [2021-06-04 21:52:20,802 INFO L226 Difference]: Without dead ends: 8226 [2021-06-04 21:52:20,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 995.2ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:52:20,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-04 21:52:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6103. [2021-06-04 21:52:20,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:20,866 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:20,866 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:20,866 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) [2021-06-04 21:52:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:20,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:20,871 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] [2021-06-04 21:52:21,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:21,071 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:21,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1357077839, now seen corresponding path program 466 times [2021-06-04 21:52:21,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:21,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256210276] [2021-06-04 21:52:21,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:21,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:21,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:21,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256210276] [2021-06-04 21:52:21,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256210276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:21,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335585262] [2021-06-04 21:52:21,471 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 [2021-06-04 21:52:21,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:21,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:21,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:21,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335585262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:21,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:21,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:21,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514798741] [2021-06-04 21:52:21,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:21,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:21,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:21,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:21,795 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:22,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:22,749 INFO L93 Difference]: Finished difference Result 8446 states and 22097 transitions. [2021-06-04 21:52:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:52:22,749 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 [2021-06-04 21:52:22,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:22,757 INFO L225 Difference]: With dead ends: 8446 [2021-06-04 21:52:22,757 INFO L226 Difference]: Without dead ends: 8176 [2021-06-04 21:52:22,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1059.1ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:52:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-04 21:52:22,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6103. [2021-06-04 21:52:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:22,819 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:22,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:22,819 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:22,819 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) [2021-06-04 21:52:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:22,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:22,824 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] [2021-06-04 21:52:23,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-04 21:52:23,024 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1833573181, now seen corresponding path program 467 times [2021-06-04 21:52:23,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:23,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176414043] [2021-06-04 21:52:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:23,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:23,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176414043] [2021-06-04 21:52:23,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176414043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:23,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511654734] [2021-06-04 21:52:23,398 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 [2021-06-04 21:52:23,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:23,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:23,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:23,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:23,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:23,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511654734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:23,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:23,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:23,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213839562] [2021-06-04 21:52:23,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:23,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:23,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:23,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:23,671 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:24,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:24,557 INFO L93 Difference]: Finished difference Result 8396 states and 21997 transitions. [2021-06-04 21:52:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:52:24,557 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 [2021-06-04 21:52:24,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:24,565 INFO L225 Difference]: With dead ends: 8396 [2021-06-04 21:52:24,565 INFO L226 Difference]: Without dead ends: 8126 [2021-06-04 21:52:24,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 976.4ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:52:24,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-04 21:52:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6103. [2021-06-04 21:52:24,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:24,628 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:24,628 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:24,628 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) [2021-06-04 21:52:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:24,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:24,632 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] [2021-06-04 21:52:24,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-04 21:52:24,833 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:24,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:24,833 INFO L82 PathProgramCache]: Analyzing trace with hash -994710003, now seen corresponding path program 468 times [2021-06-04 21:52:24,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:24,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843627786] [2021-06-04 21:52:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:25,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:25,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843627786] [2021-06-04 21:52:25,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843627786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:25,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30308000] [2021-06-04 21:52:25,222 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 [2021-06-04 21:52:25,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:25,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:25,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:25,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:25,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30308000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:25,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:25,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:25,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227569250] [2021-06-04 21:52:25,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:25,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:25,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:25,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:25,532 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:26,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:26,545 INFO L93 Difference]: Finished difference Result 8346 states and 21897 transitions. [2021-06-04 21:52:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:52:26,545 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 [2021-06-04 21:52:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:26,552 INFO L225 Difference]: With dead ends: 8346 [2021-06-04 21:52:26,552 INFO L226 Difference]: Without dead ends: 8076 [2021-06-04 21:52:26,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1139.2ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:52:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-04 21:52:26,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6103. [2021-06-04 21:52:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:26,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:26,613 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:26,613 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:26,613 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) [2021-06-04 21:52:26,613 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:26,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:26,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:26,618 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] [2021-06-04 21:52:26,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-04 21:52:26,818 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:26,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1129931397, now seen corresponding path program 469 times [2021-06-04 21:52:26,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:26,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244228894] [2021-06-04 21:52:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:27,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244228894] [2021-06-04 21:52:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244228894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979223587] [2021-06-04 21:52:27,182 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 [2021-06-04 21:52:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:27,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979223587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:27,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:27,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:27,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102873954] [2021-06-04 21:52:27,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:27,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:27,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:27,450 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:28,364 INFO L93 Difference]: Finished difference Result 8296 states and 21797 transitions. [2021-06-04 21:52:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:52:28,365 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 [2021-06-04 21:52:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:28,373 INFO L225 Difference]: With dead ends: 8296 [2021-06-04 21:52:28,373 INFO L226 Difference]: Without dead ends: 8026 [2021-06-04 21:52:28,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 988.4ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:52:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-04 21:52:28,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6103. [2021-06-04 21:52:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:28,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:28,440 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:28,440 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:28,440 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) [2021-06-04 21:52:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:28,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:28,445 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] [2021-06-04 21:52:28,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-04 21:52:28,645 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:28,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2006666165, now seen corresponding path program 470 times [2021-06-04 21:52:28,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:28,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302466812] [2021-06-04 21:52:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:29,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:29,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302466812] [2021-06-04 21:52:29,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302466812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:29,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862133044] [2021-06-04 21:52:29,046 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 [2021-06-04 21:52:29,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:29,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:29,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862133044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:29,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:29,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:29,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425313418] [2021-06-04 21:52:29,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:29,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:29,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:29,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:29,330 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:30,338 INFO L93 Difference]: Finished difference Result 8246 states and 21697 transitions. [2021-06-04 21:52:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:52:30,338 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 [2021-06-04 21:52:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:30,346 INFO L225 Difference]: With dead ends: 8246 [2021-06-04 21:52:30,347 INFO L226 Difference]: Without dead ends: 7976 [2021-06-04 21:52:30,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1114.0ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:52:30,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-04 21:52:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6103. [2021-06-04 21:52:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:30,412 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:30,412 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:30,412 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) [2021-06-04 21:52:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:30,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:30,416 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] [2021-06-04 21:52:30,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-04 21:52:30,617 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 550974777, now seen corresponding path program 471 times [2021-06-04 21:52:30,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:30,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689757783] [2021-06-04 21:52:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:30,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:30,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689757783] [2021-06-04 21:52:30,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689757783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:30,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607639037] [2021-06-04 21:52:30,992 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 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 [2021-06-04 21:52:31,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:31,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:31,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-04 21:52:31,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:31,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607639037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:31,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:31,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:31,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400414564] [2021-06-04 21:52:31,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:31,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:31,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:31,267 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:32,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:32,181 INFO L93 Difference]: Finished difference Result 8196 states and 21597 transitions. [2021-06-04 21:52:32,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:52:32,182 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 [2021-06-04 21:52:32,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:32,189 INFO L225 Difference]: With dead ends: 8196 [2021-06-04 21:52:32,190 INFO L226 Difference]: Without dead ends: 7926 [2021-06-04 21:52:32,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1025.6ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:52:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-04 21:52:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6103. [2021-06-04 21:52:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:32,254 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:32,254 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:32,254 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) [2021-06-04 21:52:32,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:32,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:32,259 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] [2021-06-04 21:52:32,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:32,459 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:32,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1915523081, now seen corresponding path program 472 times [2021-06-04 21:52:32,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:32,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110171030] [2021-06-04 21:52:32,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:32,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:32,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110171030] [2021-06-04 21:52:32,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110171030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:32,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719559065] [2021-06-04 21:52:32,806 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 [2021-06-04 21:52:32,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:32,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:32,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:32,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719559065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444778842] [2021-06-04 21:52:33,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:33,093 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:34,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:34,175 INFO L93 Difference]: Finished difference Result 8146 states and 21497 transitions. [2021-06-04 21:52:34,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:52:34,175 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 [2021-06-04 21:52:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:34,183 INFO L225 Difference]: With dead ends: 8146 [2021-06-04 21:52:34,183 INFO L226 Difference]: Without dead ends: 7876 [2021-06-04 21:52:34,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:52:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-04 21:52:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6103. [2021-06-04 21:52:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:34,245 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:34,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:34,246 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:34,246 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) [2021-06-04 21:52:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:34,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:34,250 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] [2021-06-04 21:52:34,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:34,451 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:34,451 INFO L82 PathProgramCache]: Analyzing trace with hash -361708937, now seen corresponding path program 473 times [2021-06-04 21:52:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:34,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894592039] [2021-06-04 21:52:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:34,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894592039] [2021-06-04 21:52:34,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894592039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:34,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164696768] [2021-06-04 21:52:34,797 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 [2021-06-04 21:52:34,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:34,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:34,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:34,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:35,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164696768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:35,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:35,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:35,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261986240] [2021-06-04 21:52:35,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:35,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:35,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:35,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:35,067 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:36,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:36,102 INFO L93 Difference]: Finished difference Result 8096 states and 21397 transitions. [2021-06-04 21:52:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:52:36,103 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 [2021-06-04 21:52:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:36,111 INFO L225 Difference]: With dead ends: 8096 [2021-06-04 21:52:36,111 INFO L226 Difference]: Without dead ends: 7826 [2021-06-04 21:52:36,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1071.7ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:52:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-04 21:52:36,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6103. [2021-06-04 21:52:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:36,175 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:36,175 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:36,175 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) [2021-06-04 21:52:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:36,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:36,179 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] [2021-06-04 21:52:36,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:36,380 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:36,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1260232377, now seen corresponding path program 474 times [2021-06-04 21:52:36,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:36,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318498593] [2021-06-04 21:52:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:36,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318498593] [2021-06-04 21:52:36,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318498593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:36,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462895733] [2021-06-04 21:52:36,738 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 [2021-06-04 21:52:36,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:36,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:37,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462895733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:37,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:37,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:37,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112958870] [2021-06-04 21:52:37,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:37,064 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:38,244 INFO L93 Difference]: Finished difference Result 8046 states and 21297 transitions. [2021-06-04 21:52:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:52:38,245 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 [2021-06-04 21:52:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:38,251 INFO L225 Difference]: With dead ends: 8046 [2021-06-04 21:52:38,251 INFO L226 Difference]: Without dead ends: 7776 [2021-06-04 21:52:38,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1231.2ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:52:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-04 21:52:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6103. [2021-06-04 21:52:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:38,310 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:38,310 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:38,310 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) [2021-06-04 21:52:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:38,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:38,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:38,314 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] [2021-06-04 21:52:38,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:38,515 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:38,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:38,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1419781429, now seen corresponding path program 475 times [2021-06-04 21:52:38,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:38,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015558137] [2021-06-04 21:52:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:38,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:38,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015558137] [2021-06-04 21:52:38,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015558137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:38,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413162838] [2021-06-04 21:52:38,852 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 [2021-06-04 21:52:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:38,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:38,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:39,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413162838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:39,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:39,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:39,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940715016] [2021-06-04 21:52:39,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:39,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:39,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:39,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:39,113 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:40,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:40,101 INFO L93 Difference]: Finished difference Result 7996 states and 21197 transitions. [2021-06-04 21:52:40,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:52:40,102 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 [2021-06-04 21:52:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:40,109 INFO L225 Difference]: With dead ends: 7996 [2021-06-04 21:52:40,110 INFO L226 Difference]: Without dead ends: 7726 [2021-06-04 21:52:40,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1054.2ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:52:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-04 21:52:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6103. [2021-06-04 21:52:40,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:40,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:40,193 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:40,193 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:40,193 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) [2021-06-04 21:52:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:40,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:40,197 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] [2021-06-04 21:52:40,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:40,398 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:40,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1039337477, now seen corresponding path program 476 times [2021-06-04 21:52:40,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:40,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132413499] [2021-06-04 21:52:40,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:40,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:40,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132413499] [2021-06-04 21:52:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132413499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:40,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323145086] [2021-06-04 21:52:40,746 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 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 [2021-06-04 21:52:40,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:40,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323145086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:41,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:41,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:41,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511171898] [2021-06-04 21:52:41,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:41,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:41,023 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:42,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:42,200 INFO L93 Difference]: Finished difference Result 7946 states and 21097 transitions. [2021-06-04 21:52:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:52:42,201 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 [2021-06-04 21:52:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:42,208 INFO L225 Difference]: With dead ends: 7946 [2021-06-04 21:52:42,209 INFO L226 Difference]: Without dead ends: 7676 [2021-06-04 21:52:42,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1234.9ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:52:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-04 21:52:42,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6103. [2021-06-04 21:52:42,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:42,273 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:42,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:42,274 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:42,274 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) [2021-06-04 21:52:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:42,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:42,278 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] [2021-06-04 21:52:42,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:42,478 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:42,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:42,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1663712627, now seen corresponding path program 477 times [2021-06-04 21:52:42,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:42,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375317065] [2021-06-04 21:52:42,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:42,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:42,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375317065] [2021-06-04 21:52:42,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375317065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:42,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444916942] [2021-06-04 21:52:42,843 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 [2021-06-04 21:52:42,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:42,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:42,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-04 21:52:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:43,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444916942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:43,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:43,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:43,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639142646] [2021-06-04 21:52:43,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:43,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:43,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:43,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:43,117 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:44,171 INFO L93 Difference]: Finished difference Result 7896 states and 20997 transitions. [2021-06-04 21:52:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:52:44,171 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 [2021-06-04 21:52:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:44,179 INFO L225 Difference]: With dead ends: 7896 [2021-06-04 21:52:44,179 INFO L226 Difference]: Without dead ends: 7626 [2021-06-04 21:52:44,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1133.4ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:52:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-04 21:52:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6103. [2021-06-04 21:52:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:44,242 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:44,242 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:44,242 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) [2021-06-04 21:52:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:44,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:44,246 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] [2021-06-04 21:52:44,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:44,446 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:44,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:44,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1822202813, now seen corresponding path program 478 times [2021-06-04 21:52:44,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:44,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723352116] [2021-06-04 21:52:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:44,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:44,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723352116] [2021-06-04 21:52:44,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723352116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:44,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382194683] [2021-06-04 21:52:44,794 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 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 [2021-06-04 21:52:44,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:44,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:45,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382194683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:45,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:45,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:45,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341536389] [2021-06-04 21:52:45,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:45,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:45,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:45,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:45,095 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:46,365 INFO L93 Difference]: Finished difference Result 7846 states and 20897 transitions. [2021-06-04 21:52:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:52:46,365 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 [2021-06-04 21:52:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:46,373 INFO L225 Difference]: With dead ends: 7846 [2021-06-04 21:52:46,373 INFO L226 Difference]: Without dead ends: 7576 [2021-06-04 21:52:46,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1297.5ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:52:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-04 21:52:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6103. [2021-06-04 21:52:46,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:46,435 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:46,435 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:46,435 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) [2021-06-04 21:52:46,435 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:46,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:46,440 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] [2021-06-04 21:52:46,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-04 21:52:46,640 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:46,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:46,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1080814385, now seen corresponding path program 479 times [2021-06-04 21:52:46,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:46,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828037918] [2021-06-04 21:52:46,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:46,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828037918] [2021-06-04 21:52:46,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828037918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:46,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769621801] [2021-06-04 21:52:46,972 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 [2021-06-04 21:52:47,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:52:47,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:47,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769621801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:47,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:47,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:47,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782276137] [2021-06-04 21:52:47,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:47,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:47,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:47,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:47,269 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:48,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:48,369 INFO L93 Difference]: Finished difference Result 7796 states and 20797 transitions. [2021-06-04 21:52:48,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:52:48,370 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 [2021-06-04 21:52:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:48,378 INFO L225 Difference]: With dead ends: 7796 [2021-06-04 21:52:48,378 INFO L226 Difference]: Without dead ends: 7526 [2021-06-04 21:52:48,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1125.6ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:52:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7526 states. [2021-06-04 21:52:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7526 to 6103. [2021-06-04 21:52:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:48,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:48,443 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:48,443 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:48,443 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) [2021-06-04 21:52:48,443 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:48,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:48,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:48,448 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] [2021-06-04 21:52:48,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:48,648 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:48,648 INFO L82 PathProgramCache]: Analyzing trace with hash 835737089, now seen corresponding path program 480 times [2021-06-04 21:52:48,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:48,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171719881] [2021-06-04 21:52:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:48,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171719881] [2021-06-04 21:52:48,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171719881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:48,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995114084] [2021-06-04 21:52:48,987 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 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 [2021-06-04 21:52:49,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:52:49,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-04 21:52:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:49,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995114084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:49,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:49,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:49,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992144300] [2021-06-04 21:52:49,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:49,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:49,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:49,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:49,272 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:50,551 INFO L93 Difference]: Finished difference Result 7746 states and 20697 transitions. [2021-06-04 21:52:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:52:50,551 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 [2021-06-04 21:52:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:50,559 INFO L225 Difference]: With dead ends: 7746 [2021-06-04 21:52:50,559 INFO L226 Difference]: Without dead ends: 7476 [2021-06-04 21:52:50,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 1310.4ms TimeCoverageRelationStatistics Valid=1981, Invalid=6575, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:52:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-06-04 21:52:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6103. [2021-06-04 21:52:50,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:50,625 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:50,625 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:50,625 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) [2021-06-04 21:52:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:50,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:50,630 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] [2021-06-04 21:52:50,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-04 21:52:50,830 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:50,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:50,830 INFO L82 PathProgramCache]: Analyzing trace with hash 458886767, now seen corresponding path program 481 times [2021-06-04 21:52:50,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:50,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535315318] [2021-06-04 21:52:50,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:50,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:51,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535315318] [2021-06-04 21:52:51,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535315318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:51,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314434593] [2021-06-04 21:52:51,168 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 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 [2021-06-04 21:52:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:51,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314434593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:51,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:51,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169993841] [2021-06-04 21:52:51,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:51,431 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:52,642 INFO L93 Difference]: Finished difference Result 7696 states and 20597 transitions. [2021-06-04 21:52:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:52:52,642 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 [2021-06-04 21:52:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:52,649 INFO L225 Difference]: With dead ends: 7696 [2021-06-04 21:52:52,649 INFO L226 Difference]: Without dead ends: 7426 [2021-06-04 21:52:52,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1223.1ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:52:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7426 states. [2021-06-04 21:52:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7426 to 6103. [2021-06-04 21:52:52,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:52,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:52,711 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:52,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:52,711 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:52,711 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) [2021-06-04 21:52:52,711 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:52,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:52,716 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] [2021-06-04 21:52:52,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:52,916 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1785642303, now seen corresponding path program 482 times [2021-06-04 21:52:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118015546] [2021-06-04 21:52:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:53,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118015546] [2021-06-04 21:52:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118015546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434158470] [2021-06-04 21:52:53,259 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 [2021-06-04 21:52:53,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:52:53,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:53,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:53,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:53,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:53,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434158470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:53,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:53,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:53,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173820553] [2021-06-04 21:52:53,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:53,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:53,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:53,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:53,532 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:54,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:54,928 INFO L93 Difference]: Finished difference Result 7646 states and 20497 transitions. [2021-06-04 21:52:54,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:52:54,929 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 [2021-06-04 21:52:54,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:54,936 INFO L225 Difference]: With dead ends: 7646 [2021-06-04 21:52:54,936 INFO L226 Difference]: Without dead ends: 7376 [2021-06-04 21:52:54,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1382.3ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:52:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7376 states. [2021-06-04 21:52:54,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7376 to 6103. [2021-06-04 21:52:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:54,995 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:54,995 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:54,996 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) [2021-06-04 21:52:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:55,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:55,000 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] [2021-06-04 21:52:55,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-04 21:52:55,200 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2055108819, now seen corresponding path program 483 times [2021-06-04 21:52:55,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:55,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921695667] [2021-06-04 21:52:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:55,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921695667] [2021-06-04 21:52:55,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921695667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:55,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210691625] [2021-06-04 21:52:55,532 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 [2021-06-04 21:52:55,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:52:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:55,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-04 21:52:55,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:55,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210691625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:55,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:55,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:52:55,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598878836] [2021-06-04 21:52:55,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:52:55,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:55,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:52:55,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:52:55,799 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:56,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:56,999 INFO L93 Difference]: Finished difference Result 7596 states and 20397 transitions. [2021-06-04 21:52:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:52:56,999 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 [2021-06-04 21:52:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:57,006 INFO L225 Difference]: With dead ends: 7596 [2021-06-04 21:52:57,006 INFO L226 Difference]: Without dead ends: 7326 [2021-06-04 21:52:57,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1217.7ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:52:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7326 states. [2021-06-04 21:52:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7326 to 6103. [2021-06-04 21:52:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:57,067 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:57,067 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:57,067 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) [2021-06-04 21:52:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:57,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:57,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:57,072 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] [2021-06-04 21:52:57,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:57,272 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1056212483, now seen corresponding path program 484 times [2021-06-04 21:52:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:57,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646207168] [2021-06-04 21:52:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:52:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:57,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:52:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646207168] [2021-06-04 21:52:57,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646207168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:57,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824736809] [2021-06-04 21:52:57,621 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 [2021-06-04 21:52:57,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:52:57,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:52:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:52:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:52:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:52:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824736809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:52:57,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:52:57,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:52:57,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147923332] [2021-06-04 21:52:57,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:52:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:52:57,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:52:57,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:52:57,904 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:52:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:52:59,464 INFO L93 Difference]: Finished difference Result 7546 states and 20297 transitions. [2021-06-04 21:52:59,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:52:59,464 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 [2021-06-04 21:52:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:52:59,470 INFO L225 Difference]: With dead ends: 7546 [2021-06-04 21:52:59,471 INFO L226 Difference]: Without dead ends: 7276 [2021-06-04 21:52:59,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1476.6ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:52:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-06-04 21:52:59,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 6103. [2021-06-04 21:52:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:52:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:52:59,530 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:52:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:52:59,530 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:52:59,530 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) [2021-06-04 21:52:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:52:59,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:52:59,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:52:59,535 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] [2021-06-04 21:52:59,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:52:59,735 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:52:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:52:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1359426923, now seen corresponding path program 485 times [2021-06-04 21:52:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:52:59,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775288733] [2021-06-04 21:52:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:52:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:00,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775288733] [2021-06-04 21:53:00,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775288733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412171856] [2021-06-04 21:53:00,068 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 [2021-06-04 21:53:00,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-04 21:53:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:00,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:00,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:00,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412171856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:00,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:00,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:00,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455637114] [2021-06-04 21:53:00,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:00,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:00,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:00,325 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:53:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:01,596 INFO L93 Difference]: Finished difference Result 7496 states and 20197 transitions. [2021-06-04 21:53:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:53:01,596 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 [2021-06-04 21:53:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:01,602 INFO L225 Difference]: With dead ends: 7496 [2021-06-04 21:53:01,602 INFO L226 Difference]: Without dead ends: 7226 [2021-06-04 21:53:01,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1241.8ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:53:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7226 states. [2021-06-04 21:53:01,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7226 to 6103. [2021-06-04 21:53:01,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:53:01,657 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:53:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:01,657 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:53:01,657 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) [2021-06-04 21:53:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:53:01,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:01,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:01,662 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] [2021-06-04 21:53:01,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:01,862 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:01,862 INFO L82 PathProgramCache]: Analyzing trace with hash -905221061, now seen corresponding path program 486 times [2021-06-04 21:53:01,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:01,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290000803] [2021-06-04 21:53:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:02,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:02,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290000803] [2021-06-04 21:53:02,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290000803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:02,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958399388] [2021-06-04 21:53:02,200 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 [2021-06-04 21:53:02,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-04 21:53:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-04 21:53:02,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:02,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958399388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:02,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:02,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:02,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361294139] [2021-06-04 21:53:02,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:02,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:02,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:02,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:02,481 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:53:03,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:03,926 INFO L93 Difference]: Finished difference Result 7446 states and 20097 transitions. [2021-06-04 21:53:03,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:53:03,927 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 [2021-06-04 21:53:03,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:03,932 INFO L225 Difference]: With dead ends: 7446 [2021-06-04 21:53:03,932 INFO L226 Difference]: Without dead ends: 7176 [2021-06-04 21:53:03,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1414.0ms TimeCoverageRelationStatistics Valid=2392, Invalid=7310, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:53:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-04 21:53:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 6103. [2021-06-04 21:53:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:53:03,988 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:53:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:03,988 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:53:03,988 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) [2021-06-04 21:53:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:53:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:03,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:03,993 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] [2021-06-04 21:53:04,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-04 21:53:04,193 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:04,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -290981591, now seen corresponding path program 487 times [2021-06-04 21:53:04,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:04,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915015241] [2021-06-04 21:53:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:04,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915015241] [2021-06-04 21:53:04,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915015241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:04,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509170822] [2021-06-04 21:53:04,527 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 [2021-06-04 21:53:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:04,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:04,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509170822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:04,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:04,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:04,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215728702] [2021-06-04 21:53:04,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:04,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:04,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:04,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:04,780 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:53:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:06,101 INFO L93 Difference]: Finished difference Result 7396 states and 19997 transitions. [2021-06-04 21:53:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-04 21:53:06,101 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 [2021-06-04 21:53:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:06,109 INFO L225 Difference]: With dead ends: 7396 [2021-06-04 21:53:06,109 INFO L226 Difference]: Without dead ends: 7126 [2021-06-04 21:53:06,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1281.2ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:53:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7126 states. [2021-06-04 21:53:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7126 to 6103. [2021-06-04 21:53:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6103 states, 6102 states have (on average 2.8323500491642086) internal successors, (17283), 6102 states have internal predecessors, (17283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:53:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17283 transitions. [2021-06-04 21:53:06,197 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17283 transitions. Word has length 185 [2021-06-04 21:53:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:06,198 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17283 transitions. [2021-06-04 21:53:06,198 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) [2021-06-04 21:53:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17283 transitions. [2021-06-04 21:53:06,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:06,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:06,202 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] [2021-06-04 21:53:06,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:06,403 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:06,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2006223879, now seen corresponding path program 488 times [2021-06-04 21:53:06,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:06,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722161799] [2021-06-04 21:53:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:06,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722161799] [2021-06-04 21:53:06,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722161799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:06,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445563593] [2021-06-04 21:53:06,739 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 [2021-06-04 21:53:06,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:06,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:06,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:07,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445563593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:07,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:07,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:07,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130033349] [2021-06-04 21:53:07,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:07,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:07,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:07,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:07,027 INFO L87 Difference]: Start difference. First operand 6103 states and 17283 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) [2021-06-04 21:53:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:08,610 INFO L93 Difference]: Finished difference Result 7406 states and 20047 transitions. [2021-06-04 21:53:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-04 21:53:08,610 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 [2021-06-04 21:53:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:08,620 INFO L225 Difference]: With dead ends: 7406 [2021-06-04 21:53:08,620 INFO L226 Difference]: Without dead ends: 7136 [2021-06-04 21:53:08,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 1551.5ms TimeCoverageRelationStatistics Valid=2831, Invalid=7269, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:53:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2021-06-04 21:53:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 6103. [2021-06-04 21:53:08,690 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) [2021-06-04 21:53:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-04 21:53:08,698 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-04 21:53:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:08,698 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-04 21:53:08,698 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) [2021-06-04 21:53:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-04 21:53:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:08,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:08,703 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] [2021-06-04 21:53:08,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-04 21:53:08,903 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1256095815, now seen corresponding path program 489 times [2021-06-04 21:53:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:08,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961189295] [2021-06-04 21:53:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:09,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961189295] [2021-06-04 21:53:09,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961189295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:09,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788585374] [2021-06-04 21:53:09,239 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 [2021-06-04 21:53:09,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-04 21:53:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:09,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788585374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:09,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:09,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-04 21:53:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861507143] [2021-06-04 21:53:09,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-04 21:53:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:09,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-04 21:53:09,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-04 21:53:09,498 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) [2021-06-04 21:53:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:10,832 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-04 21:53:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:53:10,832 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 [2021-06-04 21:53:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:10,840 INFO L225 Difference]: With dead ends: 8148 [2021-06-04 21:53:10,840 INFO L226 Difference]: Without dead ends: 7878 [2021-06-04 21:53:10,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1322.2ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:53:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-04 21:53:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-04 21:53:10,898 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) [2021-06-04 21:53:10,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-04 21:53:10,940 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-04 21:53:10,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:10,940 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-04 21:53:10,940 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) [2021-06-04 21:53:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-04 21:53:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-04 21:53:10,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:10,944 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] [2021-06-04 21:53:11,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-04 21:53:11,145 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1278439065, now seen corresponding path program 490 times [2021-06-04 21:53:11,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:11,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5012022] [2021-06-04 21:53:11,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:11,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:11,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:11,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5012022] [2021-06-04 21:53:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5012022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753094573] [2021-06-04 21:53:11,520 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 [2021-06-04 21:53:11,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:11,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:11,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-04 21:53:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753094573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:11,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:11,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-04 21:53:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162417435] [2021-06-04 21:53:11,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-04 21:53:11,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:11,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-04 21:53:11,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-04 21:53:11,783 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) [2021-06-04 21:53:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:13,384 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-04 21:53:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:53:13,384 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 [2021-06-04 21:53:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:13,392 INFO L225 Difference]: With dead ends: 7610 [2021-06-04 21:53:13,393 INFO L226 Difference]: Without dead ends: 7121 [2021-06-04 21:53:13,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1572.6ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:53:13,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-04 21:53:13,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-04 21:53:13,466 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) [2021-06-04 21:53:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-04 21:53:13,475 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-04 21:53:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:13,476 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-04 21:53:13,476 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) [2021-06-04 21:53:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-04 21:53:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:13,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:13,480 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] [2021-06-04 21:53:13,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-04 21:53:13,681 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:13,681 INFO L82 PathProgramCache]: Analyzing trace with hash 658293267, now seen corresponding path program 491 times [2021-06-04 21:53:13,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:13,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495844619] [2021-06-04 21:53:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:14,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:14,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495844619] [2021-06-04 21:53:14,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495844619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:14,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468225123] [2021-06-04 21:53:14,087 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 [2021-06-04 21:53:14,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:14,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:53:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:14,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468225123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:14,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:14,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-04 21:53:14,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328087443] [2021-06-04 21:53:14,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-04 21:53:14,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-04 21:53:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-04 21:53:14,425 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) [2021-06-04 21:53:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:15,303 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-04 21:53:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:53:15,303 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 [2021-06-04 21:53:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:15,312 INFO L225 Difference]: With dead ends: 7668 [2021-06-04 21:53:15,312 INFO L226 Difference]: Without dead ends: 7334 [2021-06-04 21:53:15,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-04 21:53:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-04 21:53:15,371 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) [2021-06-04 21:53:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-04 21:53:15,379 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-04 21:53:15,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:15,379 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-04 21:53:15,379 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) [2021-06-04 21:53:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-04 21:53:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:15,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:15,384 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] [2021-06-04 21:53:15,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-04 21:53:15,584 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:15,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2055723223, now seen corresponding path program 492 times [2021-06-04 21:53:15,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:15,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211454868] [2021-06-04 21:53:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:16,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211454868] [2021-06-04 21:53:16,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211454868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:16,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197058881] [2021-06-04 21:53:16,051 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 [2021-06-04 21:53:16,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:16,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:16,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:16,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:16,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197058881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:16,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:16,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:16,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552677547] [2021-06-04 21:53:16,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:16,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:16,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:16,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:16,364 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) [2021-06-04 21:53:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:17,092 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-04 21:53:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-04 21:53:17,092 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 [2021-06-04 21:53:17,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:17,101 INFO L225 Difference]: With dead ends: 9061 [2021-06-04 21:53:17,101 INFO L226 Difference]: Without dead ends: 8791 [2021-06-04 21:53:17,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 979.4ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-04 21:53:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-04 21:53:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-04 21:53:17,163 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) [2021-06-04 21:53:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:17,171 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:17,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:17,171 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:17,171 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) [2021-06-04 21:53:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:17,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:17,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:17,176 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] [2021-06-04 21:53:17,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:17,376 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:17,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1885117351, now seen corresponding path program 493 times [2021-06-04 21:53:17,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:17,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177089627] [2021-06-04 21:53:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:17,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:17,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177089627] [2021-06-04 21:53:17,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177089627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:17,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780208883] [2021-06-04 21:53:17,825 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 [2021-06-04 21:53:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:17,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:17,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:18,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780208883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:18,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:18,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:18,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966692174] [2021-06-04 21:53:18,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:18,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:18,170 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) [2021-06-04 21:53:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:18,993 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-04 21:53:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:53:18,993 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 [2021-06-04 21:53:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:19,002 INFO L225 Difference]: With dead ends: 8946 [2021-06-04 21:53:19,002 INFO L226 Difference]: Without dead ends: 8676 [2021-06-04 21:53:19,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1040.0ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:53:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-04 21:53:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-04 21:53:19,068 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) [2021-06-04 21:53:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:19,078 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:19,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:19,078 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:19,078 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) [2021-06-04 21:53:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:19,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:19,083 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] [2021-06-04 21:53:19,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-04 21:53:19,284 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:19,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1568357099, now seen corresponding path program 494 times [2021-06-04 21:53:19,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:19,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331273772] [2021-06-04 21:53:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:19,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331273772] [2021-06-04 21:53:19,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331273772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:19,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236828041] [2021-06-04 21:53:19,703 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 [2021-06-04 21:53:19,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:19,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:20,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236828041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:20,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:20,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:20,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994722552] [2021-06-04 21:53:20,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:20,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:20,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:20,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:20,001 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) [2021-06-04 21:53:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:20,781 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-04 21:53:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-04 21:53:20,781 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 [2021-06-04 21:53:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:20,789 INFO L225 Difference]: With dead ends: 8921 [2021-06-04 21:53:20,789 INFO L226 Difference]: Without dead ends: 8651 [2021-06-04 21:53:20,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 987.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-04 21:53:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-04 21:53:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-04 21:53:20,849 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) [2021-06-04 21:53:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:20,856 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:20,856 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:20,857 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) [2021-06-04 21:53:20,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:20,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:20,861 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] [2021-06-04 21:53:21,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:21,061 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1578617829, now seen corresponding path program 495 times [2021-06-04 21:53:21,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:21,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082515204] [2021-06-04 21:53:21,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:21,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082515204] [2021-06-04 21:53:21,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082515204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:21,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360400979] [2021-06-04 21:53:21,532 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 [2021-06-04 21:53:21,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:53:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:21,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:21,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360400979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:21,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:21,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:21,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710641091] [2021-06-04 21:53:21,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:21,898 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) [2021-06-04 21:53:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:22,812 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-04 21:53:22,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:53:22,813 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 [2021-06-04 21:53:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:22,820 INFO L225 Difference]: With dead ends: 8871 [2021-06-04 21:53:22,820 INFO L226 Difference]: Without dead ends: 8601 [2021-06-04 21:53:22,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1155.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-04 21:53:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-04 21:53:22,881 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) [2021-06-04 21:53:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:22,889 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:22,889 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:22,889 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) [2021-06-04 21:53:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:22,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:22,894 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] [2021-06-04 21:53:23,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-04 21:53:23,095 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash -286112045, now seen corresponding path program 496 times [2021-06-04 21:53:23,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:23,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711158050] [2021-06-04 21:53:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:23,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:23,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711158050] [2021-06-04 21:53:23,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711158050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:23,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211630614] [2021-06-04 21:53:23,519 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 [2021-06-04 21:53:23,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:23,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:23,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211630614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:23,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:23,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746203099] [2021-06-04 21:53:23,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:23,821 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) [2021-06-04 21:53:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:24,634 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-04 21:53:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-04 21:53:24,635 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 [2021-06-04 21:53:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:24,643 INFO L225 Difference]: With dead ends: 8821 [2021-06-04 21:53:24,643 INFO L226 Difference]: Without dead ends: 8551 [2021-06-04 21:53:24,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-04 21:53:24,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-04 21:53:24,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-04 21:53:24,709 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) [2021-06-04 21:53:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:24,718 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:24,718 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:24,718 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) [2021-06-04 21:53:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:24,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:24,723 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] [2021-06-04 21:53:24,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-04 21:53:24,923 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 411603363, now seen corresponding path program 497 times [2021-06-04 21:53:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:24,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465955149] [2021-06-04 21:53:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:25,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465955149] [2021-06-04 21:53:25,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465955149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:25,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901894189] [2021-06-04 21:53:25,378 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 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 [2021-06-04 21:53:25,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:25,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:25,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901894189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176958811] [2021-06-04 21:53:25,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:25,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:25,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:25,712 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) [2021-06-04 21:53:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:26,649 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-04 21:53:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:53:26,649 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 [2021-06-04 21:53:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:26,658 INFO L225 Difference]: With dead ends: 8771 [2021-06-04 21:53:26,658 INFO L226 Difference]: Without dead ends: 8501 [2021-06-04 21:53:26,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1124.3ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:53:26,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-04 21:53:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-04 21:53:26,721 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) [2021-06-04 21:53:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:26,729 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:26,729 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:26,729 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) [2021-06-04 21:53:26,729 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:26,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:26,733 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] [2021-06-04 21:53:26,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:26,934 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1308279279, now seen corresponding path program 498 times [2021-06-04 21:53:26,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:26,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122989673] [2021-06-04 21:53:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:27,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:27,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122989673] [2021-06-04 21:53:27,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122989673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:27,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483890509] [2021-06-04 21:53:27,355 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 [2021-06-04 21:53:27,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:27,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:27,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:27,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:27,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483890509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:27,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:27,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:27,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111619806] [2021-06-04 21:53:27,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:27,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:27,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:27,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:27,692 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) [2021-06-04 21:53:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:28,575 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-04 21:53:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:53:28,575 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 [2021-06-04 21:53:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:28,585 INFO L225 Difference]: With dead ends: 8721 [2021-06-04 21:53:28,585 INFO L226 Difference]: Without dead ends: 8451 [2021-06-04 21:53:28,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1044.5ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:53:28,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-04 21:53:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-04 21:53:28,653 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) [2021-06-04 21:53:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:28,662 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:28,662 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:28,663 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) [2021-06-04 21:53:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:28,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:28,668 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] [2021-06-04 21:53:28,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-04 21:53:28,868 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1809593119, now seen corresponding path program 499 times [2021-06-04 21:53:28,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:28,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653569129] [2021-06-04 21:53:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:29,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:29,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653569129] [2021-06-04 21:53:29,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653569129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:29,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107673024] [2021-06-04 21:53:29,294 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 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 [2021-06-04 21:53:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:29,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:29,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107673024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:29,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:29,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:29,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258999674] [2021-06-04 21:53:29,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:29,629 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) [2021-06-04 21:53:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:30,637 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-04 21:53:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:53:30,637 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 [2021-06-04 21:53:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:30,646 INFO L225 Difference]: With dead ends: 8671 [2021-06-04 21:53:30,646 INFO L226 Difference]: Without dead ends: 8401 [2021-06-04 21:53:30,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1151.7ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:53:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-04 21:53:30,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-04 21:53:30,704 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) [2021-06-04 21:53:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:30,712 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:30,713 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:30,713 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) [2021-06-04 21:53:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:30,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:30,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:30,717 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] [2021-06-04 21:53:30,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-04 21:53:30,918 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:30,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1333097777, now seen corresponding path program 500 times [2021-06-04 21:53:30,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:30,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132797892] [2021-06-04 21:53:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:31,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132797892] [2021-06-04 21:53:31,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132797892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:31,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612310619] [2021-06-04 21:53:31,311 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 [2021-06-04 21:53:31,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:31,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:31,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:31,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:31,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612310619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:31,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:31,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:31,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225061926] [2021-06-04 21:53:31,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:31,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:31,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:31,604 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) [2021-06-04 21:53:32,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:32,587 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-04 21:53:32,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:53:32,588 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 [2021-06-04 21:53:32,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:32,596 INFO L225 Difference]: With dead ends: 8621 [2021-06-04 21:53:32,597 INFO L226 Difference]: Without dead ends: 8351 [2021-06-04 21:53:32,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1070.3ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:53:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-04 21:53:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-04 21:53:32,657 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) [2021-06-04 21:53:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:32,666 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:32,666 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:32,666 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) [2021-06-04 21:53:32,666 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:32,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:32,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:32,671 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] [2021-06-04 21:53:32,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:32,871 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:32,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:32,871 INFO L82 PathProgramCache]: Analyzing trace with hash 133586335, now seen corresponding path program 501 times [2021-06-04 21:53:32,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:32,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926698119] [2021-06-04 21:53:32,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:33,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926698119] [2021-06-04 21:53:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926698119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550891886] [2021-06-04 21:53:33,277 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 [2021-06-04 21:53:33,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:53:33,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 61 conjunts are in the unsatisfiable core [2021-06-04 21:53:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:33,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550891886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:33,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:33,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:33,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181874116] [2021-06-04 21:53:33,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:33,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:33,602 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) [2021-06-04 21:53:34,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:34,634 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-04 21:53:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:53:34,635 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 [2021-06-04 21:53:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:34,642 INFO L225 Difference]: With dead ends: 8571 [2021-06-04 21:53:34,642 INFO L226 Difference]: Without dead ends: 8301 [2021-06-04 21:53:34,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 1158.5ms TimeCoverageRelationStatistics Valid=1569, Invalid=5237, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:53:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-04 21:53:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-04 21:53:34,698 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) [2021-06-04 21:53:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:34,706 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:34,706 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:34,706 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) [2021-06-04 21:53:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:34,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:34,711 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] [2021-06-04 21:53:34,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:34,912 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:34,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:34,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1635059, now seen corresponding path program 502 times [2021-06-04 21:53:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:34,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539750527] [2021-06-04 21:53:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:35,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:35,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539750527] [2021-06-04 21:53:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539750527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:35,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078707144] [2021-06-04 21:53:35,291 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 [2021-06-04 21:53:35,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:35,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:35,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:35,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:35,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078707144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:35,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:35,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245278666] [2021-06-04 21:53:35,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:35,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:35,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:35,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:35,594 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) [2021-06-04 21:53:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:36,616 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-04 21:53:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:53:36,617 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 [2021-06-04 21:53:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:36,623 INFO L225 Difference]: With dead ends: 8521 [2021-06-04 21:53:36,623 INFO L226 Difference]: Without dead ends: 8251 [2021-06-04 21:53:36,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1126.7ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:53:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-04 21:53:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-04 21:53:36,677 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) [2021-06-04 21:53:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:36,687 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:36,687 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:36,687 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) [2021-06-04 21:53:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:36,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:36,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:36,692 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] [2021-06-04 21:53:36,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-04 21:53:36,892 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash -878369827, now seen corresponding path program 503 times [2021-06-04 21:53:36,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:36,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172313159] [2021-06-04 21:53:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:37,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:37,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172313159] [2021-06-04 21:53:37,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172313159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:37,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403666413] [2021-06-04 21:53:37,308 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 [2021-06-04 21:53:37,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:37,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:37,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:37,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:37,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403666413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:37,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:37,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:37,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531102894] [2021-06-04 21:53:37,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:37,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:37,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:37,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:37,625 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) [2021-06-04 21:53:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:38,734 INFO L93 Difference]: Finished difference Result 8471 states and 22297 transitions. [2021-06-04 21:53:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:53:38,734 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 [2021-06-04 21:53:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:38,743 INFO L225 Difference]: With dead ends: 8471 [2021-06-04 21:53:38,743 INFO L226 Difference]: Without dead ends: 8201 [2021-06-04 21:53:38,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1253.8ms TimeCoverageRelationStatistics Valid=1755, Invalid=5727, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:53:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8201 states. [2021-06-04 21:53:38,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8201 to 6328. [2021-06-04 21:53:38,824 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) [2021-06-04 21:53:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:38,832 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:38,833 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:38,833 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) [2021-06-04 21:53:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:38,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:38,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:38,837 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] [2021-06-04 21:53:39,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-04 21:53:39,038 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:39,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:39,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1679271115, now seen corresponding path program 504 times [2021-06-04 21:53:39,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:39,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349429947] [2021-06-04 21:53:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:39,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:39,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349429947] [2021-06-04 21:53:39,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349429947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:39,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333290787] [2021-06-04 21:53:39,425 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 [2021-06-04 21:53:39,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:39,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:39,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:39,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333290787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:39,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:39,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:39,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062502094] [2021-06-04 21:53:39,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:39,736 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) [2021-06-04 21:53:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:40,743 INFO L93 Difference]: Finished difference Result 8421 states and 22197 transitions. [2021-06-04 21:53:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:53:40,743 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 [2021-06-04 21:53:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:40,751 INFO L225 Difference]: With dead ends: 8421 [2021-06-04 21:53:40,751 INFO L226 Difference]: Without dead ends: 8151 [2021-06-04 21:53:40,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 1106.3ms TimeCoverageRelationStatistics Valid=1694, Invalid=5446, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:53:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-04 21:53:40,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 6328. [2021-06-04 21:53:40,809 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) [2021-06-04 21:53:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:40,817 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:40,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:40,817 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:40,817 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) [2021-06-04 21:53:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:40,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:40,822 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] [2021-06-04 21:53:41,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable512,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:41,022 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:41,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:41,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1251147877, now seen corresponding path program 505 times [2021-06-04 21:53:41,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:41,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902069238] [2021-06-04 21:53:41,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:41,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902069238] [2021-06-04 21:53:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902069238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780631119] [2021-06-04 21:53:41,433 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 [2021-06-04 21:53:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:41,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:41,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780631119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:41,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:41,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059450283] [2021-06-04 21:53:41,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:41,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:41,738 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) [2021-06-04 21:53:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:43,048 INFO L93 Difference]: Finished difference Result 8371 states and 22097 transitions. [2021-06-04 21:53:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:53:43,048 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 [2021-06-04 21:53:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:43,056 INFO L225 Difference]: With dead ends: 8371 [2021-06-04 21:53:43,056 INFO L226 Difference]: Without dead ends: 8101 [2021-06-04 21:53:43,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1390.9ms TimeCoverageRelationStatistics Valid=1835, Invalid=5997, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:53:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-04 21:53:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 6328. [2021-06-04 21:53:43,114 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) [2021-06-04 21:53:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:43,122 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:43,122 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:43,122 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) [2021-06-04 21:53:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:43,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:43,127 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] [2021-06-04 21:53:43,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-04 21:53:43,327 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:43,328 INFO L82 PathProgramCache]: Analyzing trace with hash 766587401, now seen corresponding path program 506 times [2021-06-04 21:53:43,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:43,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941318085] [2021-06-04 21:53:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:43,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:43,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941318085] [2021-06-04 21:53:43,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941318085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:43,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478875361] [2021-06-04 21:53:43,716 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 [2021-06-04 21:53:43,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:43,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:43,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:44,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478875361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:44,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:44,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:44,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494445658] [2021-06-04 21:53:44,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:44,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:44,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:44,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:44,007 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) [2021-06-04 21:53:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:45,055 INFO L93 Difference]: Finished difference Result 8321 states and 21997 transitions. [2021-06-04 21:53:45,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:53:45,056 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 [2021-06-04 21:53:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:45,064 INFO L225 Difference]: With dead ends: 8321 [2021-06-04 21:53:45,064 INFO L226 Difference]: Without dead ends: 8051 [2021-06-04 21:53:45,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 1150.3ms TimeCoverageRelationStatistics Valid=1782, Invalid=5700, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:53:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-04 21:53:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 6328. [2021-06-04 21:53:45,123 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) [2021-06-04 21:53:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:45,131 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:45,131 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:45,131 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) [2021-06-04 21:53:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:45,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:45,136 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] [2021-06-04 21:53:45,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable514 [2021-06-04 21:53:45,336 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash -131936039, now seen corresponding path program 507 times [2021-06-04 21:53:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:45,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866087007] [2021-06-04 21:53:45,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:45,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866087007] [2021-06-04 21:53:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866087007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124946780] [2021-06-04 21:53:45,705 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 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 [2021-06-04 21:53:45,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:53:45,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 55 conjunts are in the unsatisfiable core [2021-06-04 21:53:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:46,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124946780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:46,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:46,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:46,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881739079] [2021-06-04 21:53:46,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:46,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:46,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:46,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:46,057 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) [2021-06-04 21:53:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:47,297 INFO L93 Difference]: Finished difference Result 8271 states and 21897 transitions. [2021-06-04 21:53:47,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:53:47,297 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 [2021-06-04 21:53:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:47,305 INFO L225 Difference]: With dead ends: 8271 [2021-06-04 21:53:47,305 INFO L226 Difference]: Without dead ends: 8001 [2021-06-04 21:53:47,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 1254.0ms TimeCoverageRelationStatistics Valid=1746, Invalid=6086, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:53:47,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-04 21:53:47,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 6328. [2021-06-04 21:53:47,364 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) [2021-06-04 21:53:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:47,372 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:47,373 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:47,373 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) [2021-06-04 21:53:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:47,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:47,377 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] [2021-06-04 21:53:47,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:47,578 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1746889529, now seen corresponding path program 508 times [2021-06-04 21:53:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973438112] [2021-06-04 21:53:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:47,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:47,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973438112] [2021-06-04 21:53:47,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973438112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:47,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984407145] [2021-06-04 21:53:47,933 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 [2021-06-04 21:53:48,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:53:48,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:48,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:48,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:48,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984407145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:48,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:48,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:48,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208796492] [2021-06-04 21:53:48,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:48,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:48,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:48,246 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) [2021-06-04 21:53:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:49,385 INFO L93 Difference]: Finished difference Result 8221 states and 21797 transitions. [2021-06-04 21:53:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:53:49,386 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 [2021-06-04 21:53:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:49,393 INFO L225 Difference]: With dead ends: 8221 [2021-06-04 21:53:49,393 INFO L226 Difference]: Without dead ends: 7951 [2021-06-04 21:53:49,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1865 ImplicationChecksByTransitivity, 1156.3ms TimeCoverageRelationStatistics Valid=1886, Invalid=5946, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:53:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-04 21:53:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6328. [2021-06-04 21:53:49,454 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) [2021-06-04 21:53:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:49,463 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:49,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:49,463 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:49,463 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) [2021-06-04 21:53:49,463 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:49,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:49,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:49,468 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] [2021-06-04 21:53:49,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable516 [2021-06-04 21:53:49,668 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:49,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2127333481, now seen corresponding path program 509 times [2021-06-04 21:53:49,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:49,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759949506] [2021-06-04 21:53:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:50,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:50,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759949506] [2021-06-04 21:53:50,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759949506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:50,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182559132] [2021-06-04 21:53:50,031 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 [2021-06-04 21:53:50,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:53:50,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:50,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182559132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:50,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057723862] [2021-06-04 21:53:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1276, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:50,358 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) [2021-06-04 21:53:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:51,692 INFO L93 Difference]: Finished difference Result 8171 states and 21697 transitions. [2021-06-04 21:53:51,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:53:51,692 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 [2021-06-04 21:53:51,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:51,700 INFO L225 Difference]: With dead ends: 8171 [2021-06-04 21:53:51,700 INFO L226 Difference]: Without dead ends: 7901 [2021-06-04 21:53:51,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1373.4ms TimeCoverageRelationStatistics Valid=2043, Invalid=6513, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:53:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-04 21:53:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 6328. [2021-06-04 21:53:51,760 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) [2021-06-04 21:53:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:51,768 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:51,768 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:51,769 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) [2021-06-04 21:53:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:51,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:51,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:51,773 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] [2021-06-04 21:53:51,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:51,973 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:51,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1502958331, now seen corresponding path program 510 times [2021-06-04 21:53:51,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:51,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751006600] [2021-06-04 21:53:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:52,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:52,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751006600] [2021-06-04 21:53:52,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751006600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:52,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763345227] [2021-06-04 21:53:52,339 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 [2021-06-04 21:53:52,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:53:52,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:52,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:52,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:52,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763345227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:52,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:52,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:52,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083693698] [2021-06-04 21:53:52,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:52,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:52,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:52,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:52,646 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) [2021-06-04 21:53:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:53,908 INFO L93 Difference]: Finished difference Result 8121 states and 21597 transitions. [2021-06-04 21:53:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:53:53,909 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 [2021-06-04 21:53:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:53,916 INFO L225 Difference]: With dead ends: 8121 [2021-06-04 21:53:53,916 INFO L226 Difference]: Without dead ends: 7851 [2021-06-04 21:53:53,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1211.2ms TimeCoverageRelationStatistics Valid=2006, Invalid=6184, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:53:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-04 21:53:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 6328. [2021-06-04 21:53:53,979 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) [2021-06-04 21:53:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:53,987 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:53,987 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:53,987 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) [2021-06-04 21:53:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:53,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:53,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:53,992 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] [2021-06-04 21:53:54,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:54,203 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash -693906475, now seen corresponding path program 511 times [2021-06-04 21:53:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:54,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456089594] [2021-06-04 21:53:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:54,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456089594] [2021-06-04 21:53:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456089594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:54,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435887905] [2021-06-04 21:53:54,571 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 [2021-06-04 21:53:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:54,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:54,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435887905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:54,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:54,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:54,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908618081] [2021-06-04 21:53:54,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:54,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:54,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:54,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:54,886 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) [2021-06-04 21:53:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:56,419 INFO L93 Difference]: Finished difference Result 8071 states and 21497 transitions. [2021-06-04 21:53:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:53:56,420 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 [2021-06-04 21:53:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:56,427 INFO L225 Difference]: With dead ends: 8071 [2021-06-04 21:53:56,427 INFO L226 Difference]: Without dead ends: 7801 [2021-06-04 21:53:56,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1453.1ms TimeCoverageRelationStatistics Valid=2171, Invalid=6759, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:53:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-04 21:53:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6328. [2021-06-04 21:53:56,484 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) [2021-06-04 21:53:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:56,493 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:56,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:56,493 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:56,493 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) [2021-06-04 21:53:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:56,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:56,497 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] [2021-06-04 21:53:56,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:53:56,698 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:56,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash -2085856573, now seen corresponding path program 512 times [2021-06-04 21:53:56,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:56,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869361666] [2021-06-04 21:53:56,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:57,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869361666] [2021-06-04 21:53:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869361666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013832478] [2021-06-04 21:53:57,047 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 [2021-06-04 21:53:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:53:57,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:57,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:53:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:57,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013832478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:57,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:57,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:53:57,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067738423] [2021-06-04 21:53:57,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:53:57,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:57,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:53:57,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:53:57,330 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) [2021-06-04 21:53:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:53:58,668 INFO L93 Difference]: Finished difference Result 8021 states and 21397 transitions. [2021-06-04 21:53:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:53:58,669 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 [2021-06-04 21:53:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:53:58,676 INFO L225 Difference]: With dead ends: 8021 [2021-06-04 21:53:58,676 INFO L226 Difference]: Without dead ends: 7751 [2021-06-04 21:53:58,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1256.5ms TimeCoverageRelationStatistics Valid=2142, Invalid=6414, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:53:58,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-04 21:53:58,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 6328. [2021-06-04 21:53:58,734 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) [2021-06-04 21:53:58,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:53:58,742 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:53:58,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:53:58,742 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:53:58,742 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) [2021-06-04 21:53:58,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:53:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:53:58,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:53:58,747 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] [2021-06-04 21:53:58,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-04 21:53:58,947 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:53:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:53:58,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1964033427, now seen corresponding path program 513 times [2021-06-04 21:53:58,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:53:58,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324782692] [2021-06-04 21:53:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:53:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:53:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:59,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:53:59,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324782692] [2021-06-04 21:53:59,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324782692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:59,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285926641] [2021-06-04 21:53:59,303 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 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 [2021-06-04 21:53:59,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:53:59,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:53:59,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-04 21:53:59,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:53:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:53:59,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285926641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:53:59,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:53:59,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:53:59,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471073447] [2021-06-04 21:53:59,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:53:59,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:53:59,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:53:59,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:53:59,619 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) [2021-06-04 21:54:00,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:00,962 INFO L93 Difference]: Finished difference Result 7971 states and 21297 transitions. [2021-06-04 21:54:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:54:00,962 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 [2021-06-04 21:54:00,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:00,969 INFO L225 Difference]: With dead ends: 7971 [2021-06-04 21:54:00,969 INFO L226 Difference]: Without dead ends: 7701 [2021-06-04 21:54:00,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 1392.6ms TimeCoverageRelationStatistics Valid=2040, Invalid=6890, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:54:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-04 21:54:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 6328. [2021-06-04 21:54:01,026 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) [2021-06-04 21:54:01,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:01,034 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:01,034 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:01,034 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) [2021-06-04 21:54:01,034 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:01,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:01,039 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] [2021-06-04 21:54:01,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-04 21:54:01,240 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:01,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1587183105, now seen corresponding path program 514 times [2021-06-04 21:54:01,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:01,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112574847] [2021-06-04 21:54:01,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:01,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:01,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112574847] [2021-06-04 21:54:01,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112574847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:01,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740169098] [2021-06-04 21:54:01,590 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 [2021-06-04 21:54:01,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:01,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740169098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:01,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:01,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:01,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817301903] [2021-06-04 21:54:01,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:01,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:01,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:01,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:01,871 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) [2021-06-04 21:54:03,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:03,110 INFO L93 Difference]: Finished difference Result 7921 states and 21197 transitions. [2021-06-04 21:54:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:54:03,110 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 [2021-06-04 21:54:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:03,117 INFO L225 Difference]: With dead ends: 7921 [2021-06-04 21:54:03,117 INFO L226 Difference]: Without dead ends: 7651 [2021-06-04 21:54:03,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2282 ImplicationChecksByTransitivity, 1276.6ms TimeCoverageRelationStatistics Valid=2294, Invalid=6636, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:54:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-04 21:54:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 6328. [2021-06-04 21:54:03,173 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) [2021-06-04 21:54:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:03,182 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:03,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:03,182 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:03,182 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) [2021-06-04 21:54:03,182 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:03,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:03,187 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] [2021-06-04 21:54:03,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:03,387 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1381028655, now seen corresponding path program 515 times [2021-06-04 21:54:03,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:03,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203430971] [2021-06-04 21:54:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:03,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:03,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203430971] [2021-06-04 21:54:03,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203430971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:03,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168949242] [2021-06-04 21:54:03,751 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 [2021-06-04 21:54:03,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:03,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:03,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:04,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168949242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:04,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:04,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:04,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611451540] [2021-06-04 21:54:04,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:04,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:04,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:04,053 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) [2021-06-04 21:54:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:05,613 INFO L93 Difference]: Finished difference Result 7871 states and 21097 transitions. [2021-06-04 21:54:05,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:54:05,613 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 [2021-06-04 21:54:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:05,620 INFO L225 Difference]: With dead ends: 7871 [2021-06-04 21:54:05,620 INFO L226 Difference]: Without dead ends: 7601 [2021-06-04 21:54:05,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2475 ImplicationChecksByTransitivity, 1571.7ms TimeCoverageRelationStatistics Valid=2475, Invalid=7227, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:54:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-04 21:54:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 6328. [2021-06-04 21:54:05,677 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) [2021-06-04 21:54:05,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:05,685 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:05,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:05,686 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:05,686 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) [2021-06-04 21:54:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:05,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:05,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:05,690 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] [2021-06-04 21:54:05,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-04 21:54:05,890 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:05,891 INFO L82 PathProgramCache]: Analyzing trace with hash -926812481, now seen corresponding path program 516 times [2021-06-04 21:54:05,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:05,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465623532] [2021-06-04 21:54:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:06,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:06,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465623532] [2021-06-04 21:54:06,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465623532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:06,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437208473] [2021-06-04 21:54:06,398 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 [2021-06-04 21:54:06,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 45 conjunts are in the unsatisfiable core [2021-06-04 21:54:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:06,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437208473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:06,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:06,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:06,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156813790] [2021-06-04 21:54:06,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:06,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:06,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:06,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:06,689 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) [2021-06-04 21:54:08,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:08,031 INFO L93 Difference]: Finished difference Result 7821 states and 20997 transitions. [2021-06-04 21:54:08,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:54:08,031 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 [2021-06-04 21:54:08,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:08,038 INFO L225 Difference]: With dead ends: 7821 [2021-06-04 21:54:08,038 INFO L226 Difference]: Without dead ends: 7551 [2021-06-04 21:54:08,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1499.5ms TimeCoverageRelationStatistics Valid=2462, Invalid=6850, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:54:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-04 21:54:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 6328. [2021-06-04 21:54:08,093 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) [2021-06-04 21:54:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:08,101 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:08,101 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:08,102 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) [2021-06-04 21:54:08,102 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:08,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:08,106 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] [2021-06-04 21:54:08,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:08,306 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 72083855, now seen corresponding path program 517 times [2021-06-04 21:54:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:08,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060492767] [2021-06-04 21:54:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:08,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:08,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060492767] [2021-06-04 21:54:08,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060492767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:08,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291900847] [2021-06-04 21:54:08,655 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 [2021-06-04 21:54:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:08,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:08,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:08,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291900847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:08,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:08,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:08,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568047520] [2021-06-04 21:54:08,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:08,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:08,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:08,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:08,952 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) [2021-06-04 21:54:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:10,530 INFO L93 Difference]: Finished difference Result 7771 states and 20897 transitions. [2021-06-04 21:54:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:54:10,530 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 [2021-06-04 21:54:10,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:10,536 INFO L225 Difference]: With dead ends: 7771 [2021-06-04 21:54:10,536 INFO L226 Difference]: Without dead ends: 7501 [2021-06-04 21:54:10,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 1600.7ms TimeCoverageRelationStatistics Valid=2651, Invalid=7449, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:54:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-04 21:54:10,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 6328. [2021-06-04 21:54:10,590 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) [2021-06-04 21:54:10,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:10,598 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:10,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:10,598 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:10,598 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) [2021-06-04 21:54:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:10,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:10,603 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] [2021-06-04 21:54:10,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-04 21:54:10,803 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:10,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1807244035, now seen corresponding path program 518 times [2021-06-04 21:54:10,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:10,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478466110] [2021-06-04 21:54:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:11,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478466110] [2021-06-04 21:54:11,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478466110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:11,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774027747] [2021-06-04 21:54:11,149 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 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 [2021-06-04 21:54:11,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:54:11,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:11,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:11,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774027747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:11,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:11,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:11,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676475931] [2021-06-04 21:54:11,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:11,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:11,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:11,441 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) [2021-06-04 21:54:12,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:12,794 INFO L93 Difference]: Finished difference Result 7721 states and 20797 transitions. [2021-06-04 21:54:12,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:54:12,794 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 [2021-06-04 21:54:12,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:12,800 INFO L225 Difference]: With dead ends: 7721 [2021-06-04 21:54:12,800 INFO L226 Difference]: Without dead ends: 7451 [2021-06-04 21:54:12,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2580 ImplicationChecksByTransitivity, 1341.3ms TimeCoverageRelationStatistics Valid=2646, Invalid=7056, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:54:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-04 21:54:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6328. [2021-06-04 21:54:12,854 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) [2021-06-04 21:54:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:12,862 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:12,862 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:12,862 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) [2021-06-04 21:54:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:12,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:12,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:12,867 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] [2021-06-04 21:54:13,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:13,067 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:13,068 INFO L82 PathProgramCache]: Analyzing trace with hash 223075277, now seen corresponding path program 519 times [2021-06-04 21:54:13,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:13,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858440762] [2021-06-04 21:54:13,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:13,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858440762] [2021-06-04 21:54:13,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858440762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:13,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114161962] [2021-06-04 21:54:13,420 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 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 [2021-06-04 21:54:13,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:54:13,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-04 21:54:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:13,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:13,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114161962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:13,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:13,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:13,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439290254] [2021-06-04 21:54:13,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:13,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:13,734 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) [2021-06-04 21:54:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:15,267 INFO L93 Difference]: Finished difference Result 7671 states and 20697 transitions. [2021-06-04 21:54:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:54:15,268 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 [2021-06-04 21:54:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:15,274 INFO L225 Difference]: With dead ends: 7671 [2021-06-04 21:54:15,274 INFO L226 Difference]: Without dead ends: 7401 [2021-06-04 21:54:15,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 1519.7ms TimeCoverageRelationStatistics Valid=2451, Invalid=7649, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:54:15,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-04 21:54:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 6328. [2021-06-04 21:54:15,329 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) [2021-06-04 21:54:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:15,337 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:15,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:15,337 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:15,337 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) [2021-06-04 21:54:15,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:15,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:15,342 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] [2021-06-04 21:54:15,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:15,542 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash 837314747, now seen corresponding path program 520 times [2021-06-04 21:54:15,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:15,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103249331] [2021-06-04 21:54:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:15,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103249331] [2021-06-04 21:54:15,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103249331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796691892] [2021-06-04 21:54:15,915 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 [2021-06-04 21:54:15,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:15,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:15,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:15,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:16,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796691892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:16,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:16,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146390676] [2021-06-04 21:54:16,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:16,203 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) [2021-06-04 21:54:17,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:17,654 INFO L93 Difference]: Finished difference Result 7621 states and 20597 transitions. [2021-06-04 21:54:17,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-04 21:54:17,654 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 [2021-06-04 21:54:17,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:17,662 INFO L225 Difference]: With dead ends: 7621 [2021-06-04 21:54:17,662 INFO L226 Difference]: Without dead ends: 7351 [2021-06-04 21:54:17,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2735 ImplicationChecksByTransitivity, 1454.2ms TimeCoverageRelationStatistics Valid=2846, Invalid=7254, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:54:17,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-04 21:54:17,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 6328. [2021-06-04 21:54:17,721 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) [2021-06-04 21:54:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-04 21:54:17,730 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-04 21:54:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:17,730 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-04 21:54:17,730 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) [2021-06-04 21:54:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-04 21:54:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:17,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:17,736 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] [2021-06-04 21:54:17,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:17,936 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash -877927541, now seen corresponding path program 521 times [2021-06-04 21:54:17,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:17,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764936188] [2021-06-04 21:54:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:18,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764936188] [2021-06-04 21:54:18,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764936188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:18,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020262498] [2021-06-04 21:54:18,292 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 [2021-06-04 21:54:18,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:18,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:18,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020262498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022140436] [2021-06-04 21:54:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:18,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:18,610 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) [2021-06-04 21:54:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:20,491 INFO L93 Difference]: Finished difference Result 8079 states and 21863 transitions. [2021-06-04 21:54:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-04 21:54:20,491 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 [2021-06-04 21:54:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:20,499 INFO L225 Difference]: With dead ends: 8079 [2021-06-04 21:54:20,499 INFO L226 Difference]: Without dead ends: 7456 [2021-06-04 21:54:20,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 1831.4ms TimeCoverageRelationStatistics Valid=3074, Invalid=8268, Unknown=0, NotChecked=0, Total=11342 [2021-06-04 21:54:20,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-06-04 21:54:20,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6238. [2021-06-04 21:54:20,563 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) [2021-06-04 21:54:20,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 17648 transitions. [2021-06-04 21:54:20,571 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 17648 transitions. Word has length 190 [2021-06-04 21:54:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:20,571 INFO L482 AbstractCegarLoop]: Abstraction has 6238 states and 17648 transitions. [2021-06-04 21:54:20,571 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) [2021-06-04 21:54:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 17648 transitions. [2021-06-04 21:54:20,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:20,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:20,576 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] [2021-06-04 21:54:20,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:20,777 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:20,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:20,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1910575143, now seen corresponding path program 522 times [2021-06-04 21:54:20,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:20,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763604565] [2021-06-04 21:54:20,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:21,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:21,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763604565] [2021-06-04 21:54:21,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763604565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:21,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945050730] [2021-06-04 21:54:21,133 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 [2021-06-04 21:54:21,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:21,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:21,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:21,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945050730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:21,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:21,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-04 21:54:21,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205771044] [2021-06-04 21:54:21,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:21,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:21,418 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) [2021-06-04 21:54:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:22,833 INFO L93 Difference]: Finished difference Result 8308 states and 22581 transitions. [2021-06-04 21:54:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:54:22,834 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 [2021-06-04 21:54:22,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:22,841 INFO L225 Difference]: With dead ends: 8308 [2021-06-04 21:54:22,841 INFO L226 Difference]: Without dead ends: 8038 [2021-06-04 21:54:22,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2893 ImplicationChecksByTransitivity, 1426.6ms TimeCoverageRelationStatistics Valid=3063, Invalid=7443, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:54:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8038 states. [2021-06-04 21:54:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8038 to 6418. [2021-06-04 21:54:22,899 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) [2021-06-04 21:54:22,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6418 states to 6418 states and 18207 transitions. [2021-06-04 21:54:22,908 INFO L78 Accepts]: Start accepts. Automaton has 6418 states and 18207 transitions. Word has length 190 [2021-06-04 21:54:22,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:22,908 INFO L482 AbstractCegarLoop]: Abstraction has 6418 states and 18207 transitions. [2021-06-04 21:54:22,908 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) [2021-06-04 21:54:22,908 INFO L276 IsEmpty]: Start isEmpty. Operand 6418 states and 18207 transitions. [2021-06-04 21:54:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-04 21:54:22,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:22,912 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] [2021-06-04 21:54:23,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-04 21:54:23,113 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:23,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:23,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1888231893, now seen corresponding path program 523 times [2021-06-04 21:54:23,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:23,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452981494] [2021-06-04 21:54:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:23,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452981494] [2021-06-04 21:54:23,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452981494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:23,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40134407] [2021-06-04 21:54:23,500 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 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 [2021-06-04 21:54:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:23,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-04 21:54:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40134407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:23,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:23,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-04 21:54:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981974858] [2021-06-04 21:54:23,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:23,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:23,795 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) [2021-06-04 21:54:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:25,648 INFO L93 Difference]: Finished difference Result 8251 states and 22441 transitions. [2021-06-04 21:54:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-04 21:54:25,648 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 [2021-06-04 21:54:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:25,656 INFO L225 Difference]: With dead ends: 8251 [2021-06-04 21:54:25,656 INFO L226 Difference]: Without dead ends: 7676 [2021-06-04 21:54:25,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1829.0ms TimeCoverageRelationStatistics Valid=3333, Invalid=8657, Unknown=0, NotChecked=0, Total=11990 [2021-06-04 21:54:25,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-04 21:54:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-06-04 21:54:25,721 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) [2021-06-04 21:54:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:25,731 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 190 [2021-06-04 21:54:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:25,731 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:25,731 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) [2021-06-04 21:54:25,731 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:25,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:25,737 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] [2021-06-04 21:54:25,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-04 21:54:25,937 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:25,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:25,937 INFO L82 PathProgramCache]: Analyzing trace with hash 283286740, now seen corresponding path program 524 times [2021-06-04 21:54:25,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:25,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096201711] [2021-06-04 21:54:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:26,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096201711] [2021-06-04 21:54:26,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096201711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:26,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537786315] [2021-06-04 21:54:26,387 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 [2021-06-04 21:54:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:54:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:26,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:26,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:26,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537786315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:26,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:26,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:26,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409540161] [2021-06-04 21:54:26,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:26,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:26,700 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:27,491 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-04 21:54:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-04 21:54:27,491 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:27,500 INFO L225 Difference]: With dead ends: 8396 [2021-06-04 21:54:27,501 INFO L226 Difference]: Without dead ends: 8126 [2021-06-04 21:54:27,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 984.6ms TimeCoverageRelationStatistics Valid=1551, Invalid=4149, Unknown=0, NotChecked=0, Total=5700 [2021-06-04 21:54:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-04 21:54:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-04 21:54:27,567 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) [2021-06-04 21:54:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:27,577 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:27,577 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:27,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:27,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:27,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:27,582 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] [2021-06-04 21:54:27,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-04 21:54:27,783 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:27,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:27,783 INFO L82 PathProgramCache]: Analyzing trace with hash 112680868, now seen corresponding path program 525 times [2021-06-04 21:54:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:27,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546063815] [2021-06-04 21:54:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:28,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546063815] [2021-06-04 21:54:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546063815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:28,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848485759] [2021-06-04 21:54:28,242 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 [2021-06-04 21:54:28,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:54:28,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:28,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:28,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:28,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:28,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848485759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:28,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:28,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:28,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089117837] [2021-06-04 21:54:28,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:28,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:28,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:28,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=1179, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:28,578 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) [2021-06-04 21:54:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:29,415 INFO L93 Difference]: Finished difference Result 9141 states and 23787 transitions. [2021-06-04 21:54:29,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-04 21:54:29,415 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 [2021-06-04 21:54:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:29,423 INFO L225 Difference]: With dead ends: 9141 [2021-06-04 21:54:29,423 INFO L226 Difference]: Without dead ends: 8871 [2021-06-04 21:54:29,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1056.9ms TimeCoverageRelationStatistics Valid=1625, Invalid=4537, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:54:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8871 states. [2021-06-04 21:54:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8871 to 6453. [2021-06-04 21:54:29,482 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) [2021-06-04 21:54:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:29,490 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:29,491 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:29,491 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) [2021-06-04 21:54:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:29,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:29,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:29,495 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] [2021-06-04 21:54:29,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:29,695 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 954173714, now seen corresponding path program 526 times [2021-06-04 21:54:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:29,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963250171] [2021-06-04 21:54:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:30,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:30,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963250171] [2021-06-04 21:54:30,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963250171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:30,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347773112] [2021-06-04 21:54:30,118 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 [2021-06-04 21:54:30,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:30,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:30,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347773112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:30,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:30,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:30,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170471585] [2021-06-04 21:54:30,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:30,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1118, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:30,404 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:31,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:31,222 INFO L93 Difference]: Finished difference Result 9096 states and 23697 transitions. [2021-06-04 21:54:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-04 21:54:31,222 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:31,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:31,229 INFO L225 Difference]: With dead ends: 9096 [2021-06-04 21:54:31,229 INFO L226 Difference]: Without dead ends: 8826 [2021-06-04 21:54:31,229 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 1000.6ms TimeCoverageRelationStatistics Valid=1611, Invalid=4551, Unknown=0, NotChecked=0, Total=6162 [2021-06-04 21:54:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8826 states. [2021-06-04 21:54:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8826 to 6453. [2021-06-04 21:54:31,288 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) [2021-06-04 21:54:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:31,296 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:31,296 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:31,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:31,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:31,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:31,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:31,301 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] [2021-06-04 21:54:31,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:31,501 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash -193818654, now seen corresponding path program 527 times [2021-06-04 21:54:31,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:31,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824466588] [2021-06-04 21:54:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:31,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:31,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:31,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824466588] [2021-06-04 21:54:31,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824466588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:31,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50938357] [2021-06-04 21:54:31,942 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 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 [2021-06-04 21:54:32,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:32,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:32,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50938357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:32,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:32,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:32,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483683195] [2021-06-04 21:54:32,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:32,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:32,259 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) [2021-06-04 21:54:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:33,152 INFO L93 Difference]: Finished difference Result 9046 states and 23597 transitions. [2021-06-04 21:54:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-04 21:54:33,152 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 [2021-06-04 21:54:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:33,161 INFO L225 Difference]: With dead ends: 9046 [2021-06-04 21:54:33,162 INFO L226 Difference]: Without dead ends: 8776 [2021-06-04 21:54:33,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 1083.0ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:54:33,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-06-04 21:54:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 6453. [2021-06-04 21:54:33,257 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) [2021-06-04 21:54:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:33,266 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:33,266 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:33,266 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) [2021-06-04 21:54:33,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:33,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:33,271 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] [2021-06-04 21:54:33,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-04 21:54:33,472 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:33,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:33,472 INFO L82 PathProgramCache]: Analyzing trace with hash -2058548528, now seen corresponding path program 528 times [2021-06-04 21:54:33,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:33,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645906224] [2021-06-04 21:54:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:33,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645906224] [2021-06-04 21:54:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645906224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:33,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96703874] [2021-06-04 21:54:33,888 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 [2021-06-04 21:54:33,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:33,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:33,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:33,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:34,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96703874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:34,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:34,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:34,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61081260] [2021-06-04 21:54:34,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:34,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:34,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:34,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1141, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:34,184 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:35,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:35,052 INFO L93 Difference]: Finished difference Result 8996 states and 23497 transitions. [2021-06-04 21:54:35,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-04 21:54:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:35,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:35,062 INFO L225 Difference]: With dead ends: 8996 [2021-06-04 21:54:35,062 INFO L226 Difference]: Without dead ends: 8726 [2021-06-04 21:54:35,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 1018.2ms TimeCoverageRelationStatistics Valid=1633, Invalid=4847, Unknown=0, NotChecked=0, Total=6480 [2021-06-04 21:54:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8726 states. [2021-06-04 21:54:35,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8726 to 6453. [2021-06-04 21:54:35,132 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) [2021-06-04 21:54:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:35,142 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:35,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:35,142 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:35,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:35,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:35,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:35,148 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] [2021-06-04 21:54:35,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-04 21:54:35,348 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1360833120, now seen corresponding path program 529 times [2021-06-04 21:54:35,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:35,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826222406] [2021-06-04 21:54:35,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:35,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:35,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826222406] [2021-06-04 21:54:35,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826222406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:35,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352789481] [2021-06-04 21:54:35,819 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 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 [2021-06-04 21:54:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:35,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:35,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:36,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352789481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:36,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:36,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250723385] [2021-06-04 21:54:36,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:36,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:36,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:36,125 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) [2021-06-04 21:54:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:37,115 INFO L93 Difference]: Finished difference Result 8946 states and 23397 transitions. [2021-06-04 21:54:37,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-04 21:54:37,115 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 [2021-06-04 21:54:37,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:37,125 INFO L225 Difference]: With dead ends: 8946 [2021-06-04 21:54:37,125 INFO L226 Difference]: Without dead ends: 8676 [2021-06-04 21:54:37,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1170.4ms TimeCoverageRelationStatistics Valid=1657, Invalid=5149, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:54:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-04 21:54:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6453. [2021-06-04 21:54:37,193 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) [2021-06-04 21:54:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:37,202 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:37,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:37,202 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:37,203 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) [2021-06-04 21:54:37,203 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:37,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:37,208 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] [2021-06-04 21:54:37,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable537,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:37,408 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1214251534, now seen corresponding path program 530 times [2021-06-04 21:54:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:37,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694555135] [2021-06-04 21:54:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:37,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694555135] [2021-06-04 21:54:37,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694555135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983582913] [2021-06-04 21:54:37,822 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 [2021-06-04 21:54:37,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:54:37,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:37,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:38,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983582913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:38,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:38,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:38,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918941339] [2021-06-04 21:54:38,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:38,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:38,125 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:39,039 INFO L93 Difference]: Finished difference Result 8896 states and 23297 transitions. [2021-06-04 21:54:39,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-04 21:54:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:39,048 INFO L225 Difference]: With dead ends: 8896 [2021-06-04 21:54:39,048 INFO L226 Difference]: Without dead ends: 8626 [2021-06-04 21:54:39,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 1052.4ms TimeCoverageRelationStatistics Valid=1671, Invalid=5135, Unknown=0, NotChecked=0, Total=6806 [2021-06-04 21:54:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8626 states. [2021-06-04 21:54:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8626 to 6453. [2021-06-04 21:54:39,116 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) [2021-06-04 21:54:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:39,125 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:39,125 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:39,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:39,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:39,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:39,130 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] [2021-06-04 21:54:39,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:39,331 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:39,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:39,331 INFO L82 PathProgramCache]: Analyzing trace with hash 712937694, now seen corresponding path program 531 times [2021-06-04 21:54:39,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:39,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102320249] [2021-06-04 21:54:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:39,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102320249] [2021-06-04 21:54:39,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102320249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:39,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623141063] [2021-06-04 21:54:39,750 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 [2021-06-04 21:54:39,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:54:39,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 64 conjunts are in the unsatisfiable core [2021-06-04 21:54:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:40,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:40,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623141063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:40,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:40,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:40,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705874403] [2021-06-04 21:54:40,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:40,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:40,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:40,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:40,076 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) [2021-06-04 21:54:41,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:41,102 INFO L93 Difference]: Finished difference Result 8846 states and 23197 transitions. [2021-06-04 21:54:41,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-04 21:54:41,102 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 [2021-06-04 21:54:41,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:41,111 INFO L225 Difference]: With dead ends: 8846 [2021-06-04 21:54:41,111 INFO L226 Difference]: Without dead ends: 8576 [2021-06-04 21:54:41,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 1163.0ms TimeCoverageRelationStatistics Valid=1676, Invalid=5464, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:54:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8576 states. [2021-06-04 21:54:41,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8576 to 6453. [2021-06-04 21:54:41,179 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) [2021-06-04 21:54:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:41,189 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:41,190 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:41,190 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) [2021-06-04 21:54:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:41,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:41,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:41,195 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] [2021-06-04 21:54:41,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable539 [2021-06-04 21:54:41,395 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1189433036, now seen corresponding path program 532 times [2021-06-04 21:54:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:41,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213869517] [2021-06-04 21:54:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:41,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213869517] [2021-06-04 21:54:41,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213869517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:41,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970433693] [2021-06-04 21:54:41,795 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 [2021-06-04 21:54:41,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:41,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:41,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:42,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970433693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:42,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:42,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:42,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858679271] [2021-06-04 21:54:42,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:42,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:42,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:42,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:42,072 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:43,058 INFO L93 Difference]: Finished difference Result 8796 states and 23097 transitions. [2021-06-04 21:54:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-04 21:54:43,058 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:43,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:43,067 INFO L225 Difference]: With dead ends: 8796 [2021-06-04 21:54:43,067 INFO L226 Difference]: Without dead ends: 8526 [2021-06-04 21:54:43,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1086.8ms TimeCoverageRelationStatistics Valid=1725, Invalid=5415, Unknown=0, NotChecked=0, Total=7140 [2021-06-04 21:54:43,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8526 states. [2021-06-04 21:54:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8526 to 6453. [2021-06-04 21:54:43,136 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) [2021-06-04 21:54:43,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:43,145 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:43,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:43,145 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:43,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:43,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:43,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:43,151 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] [2021-06-04 21:54:43,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-04 21:54:43,351 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1638850148, now seen corresponding path program 533 times [2021-06-04 21:54:43,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:43,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76333788] [2021-06-04 21:54:43,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:43,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:43,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76333788] [2021-06-04 21:54:43,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76333788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:43,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685258125] [2021-06-04 21:54:43,766 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 [2021-06-04 21:54:43,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:43,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:43,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:44,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685258125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991822352] [2021-06-04 21:54:44,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:44,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:44,066 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) [2021-06-04 21:54:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:45,210 INFO L93 Difference]: Finished difference Result 8746 states and 22997 transitions. [2021-06-04 21:54:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-04 21:54:45,211 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 [2021-06-04 21:54:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:45,219 INFO L225 Difference]: With dead ends: 8746 [2021-06-04 21:54:45,219 INFO L226 Difference]: Without dead ends: 8476 [2021-06-04 21:54:45,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:54:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8476 states. [2021-06-04 21:54:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8476 to 6453. [2021-06-04 21:54:45,286 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) [2021-06-04 21:54:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:45,295 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:45,295 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:45,295 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) [2021-06-04 21:54:45,296 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:45,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:45,300 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] [2021-06-04 21:54:45,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-04 21:54:45,501 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1774071542, now seen corresponding path program 534 times [2021-06-04 21:54:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:45,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053856428] [2021-06-04 21:54:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053856428] [2021-06-04 21:54:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053856428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225343082] [2021-06-04 21:54:45,889 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 [2021-06-04 21:54:45,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:46,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225343082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:46,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:46,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209235421] [2021-06-04 21:54:46,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:46,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:46,181 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:47,215 INFO L93 Difference]: Finished difference Result 8696 states and 22897 transitions. [2021-06-04 21:54:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-04 21:54:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:47,223 INFO L225 Difference]: With dead ends: 8696 [2021-06-04 21:54:47,223 INFO L226 Difference]: Without dead ends: 8426 [2021-06-04 21:54:47,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 1121.3ms TimeCoverageRelationStatistics Valid=1795, Invalid=5687, Unknown=0, NotChecked=0, Total=7482 [2021-06-04 21:54:47,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8426 states. [2021-06-04 21:54:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8426 to 6453. [2021-06-04 21:54:47,286 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) [2021-06-04 21:54:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:47,295 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:47,295 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:47,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:47,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:47,300 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] [2021-06-04 21:54:47,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-04 21:54:47,501 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:47,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1644160986, now seen corresponding path program 535 times [2021-06-04 21:54:47,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:47,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025870052] [2021-06-04 21:54:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:47,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025870052] [2021-06-04 21:54:47,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025870052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:47,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123488063] [2021-06-04 21:54:47,904 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 [2021-06-04 21:54:47,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:48,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123488063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:48,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:48,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:48,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791302106] [2021-06-04 21:54:48,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:48,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:48,195 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) [2021-06-04 21:54:49,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:49,432 INFO L93 Difference]: Finished difference Result 8646 states and 22797 transitions. [2021-06-04 21:54:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-04 21:54:49,433 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 [2021-06-04 21:54:49,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:49,439 INFO L225 Difference]: With dead ends: 8646 [2021-06-04 21:54:49,439 INFO L226 Difference]: Without dead ends: 8376 [2021-06-04 21:54:49,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 1272.3ms TimeCoverageRelationStatistics Valid=1825, Invalid=6007, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:54:49,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8376 states. [2021-06-04 21:54:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8376 to 6453. [2021-06-04 21:54:49,500 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) [2021-06-04 21:54:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:49,509 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:49,509 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:49,509 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) [2021-06-04 21:54:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:49,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:49,514 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] [2021-06-04 21:54:49,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-04 21:54:49,715 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -93165368, now seen corresponding path program 536 times [2021-06-04 21:54:49,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:49,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036770172] [2021-06-04 21:54:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:50,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:50,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036770172] [2021-06-04 21:54:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036770172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:50,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136188186] [2021-06-04 21:54:50,096 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 [2021-06-04 21:54:50,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:54:50,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:50,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:50,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:50,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136188186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:50,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:50,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:50,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027092116] [2021-06-04 21:54:50,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:50,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:50,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:50,369 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:51,473 INFO L93 Difference]: Finished difference Result 8596 states and 22697 transitions. [2021-06-04 21:54:51,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-04 21:54:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:51,481 INFO L225 Difference]: With dead ends: 8596 [2021-06-04 21:54:51,482 INFO L226 Difference]: Without dead ends: 8326 [2021-06-04 21:54:51,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1119.3ms TimeCoverageRelationStatistics Valid=1881, Invalid=5951, Unknown=0, NotChecked=0, Total=7832 [2021-06-04 21:54:51,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8326 states. [2021-06-04 21:54:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8326 to 6453. [2021-06-04 21:54:51,559 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) [2021-06-04 21:54:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:51,568 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:51,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:51,568 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:51,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:51,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:51,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:51,572 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] [2021-06-04 21:54:51,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:51,773 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1271382936, now seen corresponding path program 537 times [2021-06-04 21:54:51,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:51,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874147666] [2021-06-04 21:54:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:52,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874147666] [2021-06-04 21:54:52,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874147666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:52,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716598362] [2021-06-04 21:54:52,162 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 [2021-06-04 21:54:52,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:54:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:52,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-04 21:54:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:52,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716598362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:52,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:52,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:52,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745430329] [2021-06-04 21:54:52,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:52,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:52,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:52,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:52,465 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) [2021-06-04 21:54:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:53,673 INFO L93 Difference]: Finished difference Result 8546 states and 22597 transitions. [2021-06-04 21:54:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-04 21:54:53,673 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 [2021-06-04 21:54:53,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:53,682 INFO L225 Difference]: With dead ends: 8546 [2021-06-04 21:54:53,682 INFO L226 Difference]: Without dead ends: 8276 [2021-06-04 21:54:53,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1919 ImplicationChecksByTransitivity, 1270.2ms TimeCoverageRelationStatistics Valid=1847, Invalid=6343, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:54:53,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-04 21:54:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6453. [2021-06-04 21:54:53,750 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) [2021-06-04 21:54:53,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:53,759 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:53,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:53,760 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:53,760 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) [2021-06-04 21:54:53,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:53,792 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:53,793 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] [2021-06-04 21:54:53,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-04 21:54:53,993 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:53,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1005849082, now seen corresponding path program 538 times [2021-06-04 21:54:53,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:53,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597425548] [2021-06-04 21:54:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:54,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:54,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597425548] [2021-06-04 21:54:54,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597425548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:54,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593527648] [2021-06-04 21:54:54,368 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 [2021-06-04 21:54:54,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:54:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:54,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:54,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:54,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593527648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:54,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:54,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:54,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004059746] [2021-06-04 21:54:54,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:54,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:54,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:54,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:54,641 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:55,751 INFO L93 Difference]: Finished difference Result 8496 states and 22497 transitions. [2021-06-04 21:54:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-04 21:54:55,751 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:54:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:55,760 INFO L225 Difference]: With dead ends: 8496 [2021-06-04 21:54:55,760 INFO L226 Difference]: Without dead ends: 8226 [2021-06-04 21:54:55,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2058 ImplicationChecksByTransitivity, 1165.5ms TimeCoverageRelationStatistics Valid=1983, Invalid=6207, Unknown=0, NotChecked=0, Total=8190 [2021-06-04 21:54:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2021-06-04 21:54:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 6453. [2021-06-04 21:54:55,828 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) [2021-06-04 21:54:55,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:55,838 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:55,838 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:55,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:54:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:55,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:55,843 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] [2021-06-04 21:54:56,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:54:56,044 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1904372522, now seen corresponding path program 539 times [2021-06-04 21:54:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:56,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903543970] [2021-06-04 21:54:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:56,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:56,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903543970] [2021-06-04 21:54:56,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903543970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:56,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171288375] [2021-06-04 21:54:56,455 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 [2021-06-04 21:54:56,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:54:56,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:56,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171288375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:56,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:56,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:54:56,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260456926] [2021-06-04 21:54:56,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:54:56,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:56,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:54:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:54:56,748 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) [2021-06-04 21:54:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:54:58,026 INFO L93 Difference]: Finished difference Result 8446 states and 22397 transitions. [2021-06-04 21:54:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-04 21:54:58,026 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 [2021-06-04 21:54:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:54:58,035 INFO L225 Difference]: With dead ends: 8446 [2021-06-04 21:54:58,035 INFO L226 Difference]: Without dead ends: 8176 [2021-06-04 21:54:58,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 1333.8ms TimeCoverageRelationStatistics Valid=2017, Invalid=6539, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:54:58,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-04 21:54:58,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6453. [2021-06-04 21:54:58,101 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) [2021-06-04 21:54:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:54:58,110 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:54:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:54:58,110 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:54:58,110 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) [2021-06-04 21:54:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:54:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:54:58,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:54:58,115 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] [2021-06-04 21:54:58,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-06-04 21:54:58,315 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:54:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:54:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash 775641284, now seen corresponding path program 540 times [2021-06-04 21:54:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:54:58,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025613910] [2021-06-04 21:54:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:54:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:54:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:58,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:54:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025613910] [2021-06-04 21:54:58,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025613910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:58,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379510798] [2021-06-04 21:54:58,722 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 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 [2021-06-04 21:54:58,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:54:58,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:54:58,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:54:58,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:54:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:54:59,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379510798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:54:59,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:54:59,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:54:59,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696536921] [2021-06-04 21:54:59,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:54:59,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:54:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:54:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:54:59,009 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:00,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:00,129 INFO L93 Difference]: Finished difference Result 8396 states and 22297 transitions. [2021-06-04 21:55:00,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-04 21:55:00,130 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:00,138 INFO L225 Difference]: With dead ends: 8396 [2021-06-04 21:55:00,138 INFO L226 Difference]: Without dead ends: 8126 [2021-06-04 21:55:00,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2203 ImplicationChecksByTransitivity, 1207.1ms TimeCoverageRelationStatistics Valid=2101, Invalid=6455, Unknown=0, NotChecked=0, Total=8556 [2021-06-04 21:55:00,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8126 states. [2021-06-04 21:55:00,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8126 to 6453. [2021-06-04 21:55:00,195 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) [2021-06-04 21:55:00,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:00,204 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:00,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:00,204 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:00,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:00,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:00,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:00,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:00,208 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] [2021-06-04 21:55:00,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:00,409 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:00,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:00,409 INFO L82 PathProgramCache]: Analyzing trace with hash 395197332, now seen corresponding path program 541 times [2021-06-04 21:55:00,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:00,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6894678] [2021-06-04 21:55:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:00,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:00,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6894678] [2021-06-04 21:55:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6894678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:00,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277669226] [2021-06-04 21:55:00,817 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 [2021-06-04 21:55:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:00,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:01,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277669226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:01,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:01,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599471528] [2021-06-04 21:55:01,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:01,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:01,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:01,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:01,107 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) [2021-06-04 21:55:02,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:02,438 INFO L93 Difference]: Finished difference Result 8346 states and 22197 transitions. [2021-06-04 21:55:02,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-04 21:55:02,438 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 [2021-06-04 21:55:02,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:02,447 INFO L225 Difference]: With dead ends: 8346 [2021-06-04 21:55:02,447 INFO L226 Difference]: Without dead ends: 8076 [2021-06-04 21:55:02,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2248 ImplicationChecksByTransitivity, 1407.8ms TimeCoverageRelationStatistics Valid=2137, Invalid=6793, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:55:02,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8076 states. [2021-06-04 21:55:02,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8076 to 6453. [2021-06-04 21:55:02,505 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) [2021-06-04 21:55:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:02,518 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:02,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:02,518 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:02,518 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) [2021-06-04 21:55:02,518 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:02,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:02,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:02,524 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] [2021-06-04 21:55:02,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-04 21:55:02,724 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1019572482, now seen corresponding path program 542 times [2021-06-04 21:55:02,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:02,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791523596] [2021-06-04 21:55:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:03,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791523596] [2021-06-04 21:55:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791523596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498577143] [2021-06-04 21:55:03,164 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 [2021-06-04 21:55:03,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:55:03,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:03,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:03,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:03,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498577143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:03,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:03,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:03,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047586391] [2021-06-04 21:55:03,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:03,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:03,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:03,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1190, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:03,474 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:04,700 INFO L93 Difference]: Finished difference Result 8296 states and 22097 transitions. [2021-06-04 21:55:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-04 21:55:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:04,709 INFO L225 Difference]: With dead ends: 8296 [2021-06-04 21:55:04,710 INFO L226 Difference]: Without dead ends: 8026 [2021-06-04 21:55:04,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1335.3ms TimeCoverageRelationStatistics Valid=2235, Invalid=6695, Unknown=0, NotChecked=0, Total=8930 [2021-06-04 21:55:04,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2021-06-04 21:55:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 6453. [2021-06-04 21:55:04,775 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) [2021-06-04 21:55:04,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:04,784 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:04,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:04,784 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:04,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:04,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:04,789 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] [2021-06-04 21:55:04,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:04,990 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:04,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:04,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1828624338, now seen corresponding path program 543 times [2021-06-04 21:55:04,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:04,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349809678] [2021-06-04 21:55:04,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:04,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:05,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:05,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:05,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349809678] [2021-06-04 21:55:05,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349809678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:05,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600228314] [2021-06-04 21:55:05,387 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 [2021-06-04 21:55:05,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:55:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:05,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-04 21:55:05,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:05,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600228314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:05,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:05,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:05,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853171871] [2021-06-04 21:55:05,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:05,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:05,741 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) [2021-06-04 21:55:07,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:07,249 INFO L93 Difference]: Finished difference Result 8246 states and 21997 transitions. [2021-06-04 21:55:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-04 21:55:07,249 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 [2021-06-04 21:55:07,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:07,258 INFO L225 Difference]: With dead ends: 8246 [2021-06-04 21:55:07,258 INFO L226 Difference]: Without dead ends: 7976 [2021-06-04 21:55:07,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1486.2ms TimeCoverageRelationStatistics Valid=2135, Invalid=7177, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:55:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7976 states. [2021-06-04 21:55:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7976 to 6453. [2021-06-04 21:55:07,322 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) [2021-06-04 21:55:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:07,331 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:07,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:07,331 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:07,331 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) [2021-06-04 21:55:07,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:07,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:07,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:07,337 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] [2021-06-04 21:55:07,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:07,537 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:07,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 436674240, now seen corresponding path program 544 times [2021-06-04 21:55:07,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:07,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057326224] [2021-06-04 21:55:07,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:07,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057326224] [2021-06-04 21:55:07,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057326224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:07,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271875487] [2021-06-04 21:55:07,937 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 [2021-06-04 21:55:08,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:55:08,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:08,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:08,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:08,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271875487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:08,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:08,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:08,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576099251] [2021-06-04 21:55:08,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:08,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:08,256 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:09,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:09,586 INFO L93 Difference]: Finished difference Result 8196 states and 21897 transitions. [2021-06-04 21:55:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-04 21:55:09,587 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:09,595 INFO L225 Difference]: With dead ends: 8196 [2021-06-04 21:55:09,595 INFO L226 Difference]: Without dead ends: 7926 [2021-06-04 21:55:09,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 1340.6ms TimeCoverageRelationStatistics Valid=2385, Invalid=6927, Unknown=0, NotChecked=0, Total=9312 [2021-06-04 21:55:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7926 states. [2021-06-04 21:55:09,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7926 to 6453. [2021-06-04 21:55:09,655 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) [2021-06-04 21:55:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:09,664 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:09,664 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:09,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:09,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:09,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:09,669 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] [2021-06-04 21:55:09,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-04 21:55:09,869 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:09,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:09,870 INFO L82 PathProgramCache]: Analyzing trace with hash 191596944, now seen corresponding path program 545 times [2021-06-04 21:55:09,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:09,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337154116] [2021-06-04 21:55:09,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:10,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337154116] [2021-06-04 21:55:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337154116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011678024] [2021-06-04 21:55:10,239 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 [2021-06-04 21:55:10,309 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:55:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:10,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011678024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:10,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:10,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:10,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909595365] [2021-06-04 21:55:10,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:10,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:10,551 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) [2021-06-04 21:55:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:12,058 INFO L93 Difference]: Finished difference Result 8146 states and 21797 transitions. [2021-06-04 21:55:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-04 21:55:12,058 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 [2021-06-04 21:55:12,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:12,067 INFO L225 Difference]: With dead ends: 8146 [2021-06-04 21:55:12,067 INFO L226 Difference]: Without dead ends: 7876 [2021-06-04 21:55:12,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 1482.8ms TimeCoverageRelationStatistics Valid=2425, Invalid=7277, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:55:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-06-04 21:55:12,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6453. [2021-06-04 21:55:12,136 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) [2021-06-04 21:55:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:12,145 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:12,146 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:12,146 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) [2021-06-04 21:55:12,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:12,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:12,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:12,151 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] [2021-06-04 21:55:12,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:12,351 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:12,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:12,352 INFO L82 PathProgramCache]: Analyzing trace with hash -185253378, now seen corresponding path program 546 times [2021-06-04 21:55:12,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:12,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249129823] [2021-06-04 21:55:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:12,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:12,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249129823] [2021-06-04 21:55:12,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249129823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:12,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532442143] [2021-06-04 21:55:12,717 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 [2021-06-04 21:55:12,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:55:12,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:12,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-04 21:55:12,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:13,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532442143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:13,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:13,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:13,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702579637] [2021-06-04 21:55:13,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:13,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:13,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:13,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:13,041 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:14,465 INFO L93 Difference]: Finished difference Result 8096 states and 21697 transitions. [2021-06-04 21:55:14,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-04 21:55:14,465 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:14,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:14,473 INFO L225 Difference]: With dead ends: 8096 [2021-06-04 21:55:14,473 INFO L226 Difference]: Without dead ends: 7826 [2021-06-04 21:55:14,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 1364.1ms TimeCoverageRelationStatistics Valid=2551, Invalid=7151, Unknown=0, NotChecked=0, Total=9702 [2021-06-04 21:55:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2021-06-04 21:55:14,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 6453. [2021-06-04 21:55:14,532 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) [2021-06-04 21:55:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:14,542 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:14,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:14,542 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:14,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:14,542 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:14,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:14,546 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] [2021-06-04 21:55:14,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-04 21:55:14,747 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1141502158, now seen corresponding path program 547 times [2021-06-04 21:55:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:14,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780049409] [2021-06-04 21:55:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:15,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:15,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780049409] [2021-06-04 21:55:15,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780049409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:15,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682262037] [2021-06-04 21:55:15,252 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 [2021-06-04 21:55:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:15,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:15,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682262037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:15,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:15,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:15,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411652494] [2021-06-04 21:55:15,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:15,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:15,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:15,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:15,564 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) [2021-06-04 21:55:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:17,221 INFO L93 Difference]: Finished difference Result 8046 states and 21597 transitions. [2021-06-04 21:55:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-04 21:55:17,221 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 [2021-06-04 21:55:17,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:17,230 INFO L225 Difference]: With dead ends: 8046 [2021-06-04 21:55:17,230 INFO L226 Difference]: Without dead ends: 7776 [2021-06-04 21:55:17,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 1716.6ms TimeCoverageRelationStatistics Valid=2593, Invalid=7507, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:55:17,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7776 states. [2021-06-04 21:55:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7776 to 6453. [2021-06-04 21:55:17,293 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) [2021-06-04 21:55:17,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:17,302 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:17,302 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:17,302 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) [2021-06-04 21:55:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:17,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:17,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:17,307 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] [2021-06-04 21:55:17,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:17,507 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:17,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:17,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1595718332, now seen corresponding path program 548 times [2021-06-04 21:55:17,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:17,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270451619] [2021-06-04 21:55:17,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:17,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:17,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270451619] [2021-06-04 21:55:17,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270451619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:17,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80799096] [2021-06-04 21:55:17,942 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 [2021-06-04 21:55:18,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-04 21:55:18,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:18,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:18,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:18,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80799096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:18,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:18,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:18,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867003982] [2021-06-04 21:55:18,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:18,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:18,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:18,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:18,226 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:19,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:19,608 INFO L93 Difference]: Finished difference Result 7996 states and 21497 transitions. [2021-06-04 21:55:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-04 21:55:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:19,617 INFO L225 Difference]: With dead ends: 7996 [2021-06-04 21:55:19,617 INFO L226 Difference]: Without dead ends: 7726 [2021-06-04 21:55:19,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 1393.8ms TimeCoverageRelationStatistics Valid=2733, Invalid=7367, Unknown=0, NotChecked=0, Total=10100 [2021-06-04 21:55:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7726 states. [2021-06-04 21:55:19,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7726 to 6453. [2021-06-04 21:55:19,681 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) [2021-06-04 21:55:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:19,690 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:19,690 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:19,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:19,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:19,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:19,695 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] [2021-06-04 21:55:19,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-04 21:55:19,911 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:19,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1700352628, now seen corresponding path program 549 times [2021-06-04 21:55:19,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:19,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797043789] [2021-06-04 21:55:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:20,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:20,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797043789] [2021-06-04 21:55:20,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797043789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:20,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670783265] [2021-06-04 21:55:20,327 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 [2021-06-04 21:55:20,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-04 21:55:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:20,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-04 21:55:20,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:20,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670783265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:20,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:20,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:20,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395912554] [2021-06-04 21:55:20,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:20,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:20,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:20,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:20,633 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) [2021-06-04 21:55:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:22,221 INFO L93 Difference]: Finished difference Result 7946 states and 21397 transitions. [2021-06-04 21:55:22,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-04 21:55:22,221 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 [2021-06-04 21:55:22,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:22,230 INFO L225 Difference]: With dead ends: 7946 [2021-06-04 21:55:22,230 INFO L226 Difference]: Without dead ends: 7676 [2021-06-04 21:55:22,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2768 ImplicationChecksByTransitivity, 1571.2ms TimeCoverageRelationStatistics Valid=2540, Invalid=7966, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:55:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7676 states. [2021-06-04 21:55:22,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7676 to 6453. [2021-06-04 21:55:22,298 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) [2021-06-04 21:55:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:22,308 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:22,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:22,308 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:22,309 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) [2021-06-04 21:55:22,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:22,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:22,314 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] [2021-06-04 21:55:22,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:22,515 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 715286778, now seen corresponding path program 550 times [2021-06-04 21:55:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:22,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678769639] [2021-06-04 21:55:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:22,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:22,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678769639] [2021-06-04 21:55:22,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678769639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:22,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116934046] [2021-06-04 21:55:22,969 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 [2021-06-04 21:55:23,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-04 21:55:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:23,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116934046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:23,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:23,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:23,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985848679] [2021-06-04 21:55:23,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:23,253 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:24,680 INFO L93 Difference]: Finished difference Result 7896 states and 21297 transitions. [2021-06-04 21:55:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-04 21:55:24,681 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have 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 [2021-06-04 21:55:24,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:24,689 INFO L225 Difference]: With dead ends: 7896 [2021-06-04 21:55:24,689 INFO L226 Difference]: Without dead ends: 7626 [2021-06-04 21:55:24,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1477.7ms TimeCoverageRelationStatistics Valid=2931, Invalid=7575, Unknown=0, NotChecked=0, Total=10506 [2021-06-04 21:55:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-04 21:55:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6453. [2021-06-04 21:55:24,759 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) [2021-06-04 21:55:24,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:24,769 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:24,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:24,769 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:24,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-04 21:55:24,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:24,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:24,774 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] [2021-06-04 21:55:24,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-04 21:55:24,975 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1549361206, now seen corresponding path program 551 times [2021-06-04 21:55:24,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:24,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969962600] [2021-06-04 21:55:24,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:25,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969962600] [2021-06-04 21:55:25,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969962600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:25,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936559669] [2021-06-04 21:55:25,397 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 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 [2021-06-04 21:55:25,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-04 21:55:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-04 21:55:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936559669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:25,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-06-04 21:55:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520749523] [2021-06-04 21:55:25,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-04 21:55:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-04 21:55:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2021-06-04 21:55:25,711 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) [2021-06-04 21:55:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-04 21:55:27,504 INFO L93 Difference]: Finished difference Result 7846 states and 21197 transitions. [2021-06-04 21:55:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-04 21:55:27,504 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 [2021-06-04 21:55:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-04 21:55:27,512 INFO L225 Difference]: With dead ends: 7846 [2021-06-04 21:55:27,512 INFO L226 Difference]: Without dead ends: 7576 [2021-06-04 21:55:27,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3048 ImplicationChecksByTransitivity, 1766.7ms TimeCoverageRelationStatistics Valid=2977, Invalid=7943, Unknown=0, NotChecked=0, Total=10920 [2021-06-04 21:55:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7576 states. [2021-06-04 21:55:27,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7576 to 6453. [2021-06-04 21:55:27,587 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) [2021-06-04 21:55:27,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6453 states to 6453 states and 18283 transitions. [2021-06-04 21:55:27,596 INFO L78 Accepts]: Start accepts. Automaton has 6453 states and 18283 transitions. Word has length 195 [2021-06-04 21:55:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-04 21:55:27,596 INFO L482 AbstractCegarLoop]: Abstraction has 6453 states and 18283 transitions. [2021-06-04 21:55:27,596 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) [2021-06-04 21:55:27,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6453 states and 18283 transitions. [2021-06-04 21:55:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-06-04 21:55:27,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-04 21:55:27,600 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] [2021-06-04 21:55:27,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:27,801 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-04 21:55:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-04 21:55:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -935121736, now seen corresponding path program 552 times [2021-06-04 21:55:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-04 21:55:27,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161731187] [2021-06-04 21:55:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-04 21:55:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-04 21:55:28,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:28,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-04 21:55:28,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161731187] [2021-06-04 21:55:28,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161731187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:28,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376958352] [2021-06-04 21:55:28,215 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 [2021-06-04 21:55:28,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-04 21:55:28,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-04 21:55:28,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-04 21:55:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-04 21:55:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1187 backedges. 0 proven. 1187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-04 21:55:28,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376958352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-04 21:55:28,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-04 21:55:28,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-06-04 21:55:28,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380339270] [2021-06-04 21:55:28,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-04 21:55:28,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-04 21:55:28,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-04 21:55:28,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-04 21:55:28,512 INFO L87 Difference]: Start difference. First operand 6453 states and 18283 transitions. Second operand has 38 states, 38 states have (on average 5.131578947368421) internal successors, (195), 38 states have internal predecessors, (195), 0 states have call successors, (0), 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... [2021-06-04 21:55:28,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-04 21:55:28,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-04 21:55:28,769 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-04 21:55:28,770 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-04 21:55:28,772 WARN L196 ceAbstractionStarter]: Timeout [2021-06-04 21:55:28,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.06 09:55:28 BasicIcfg [2021-06-04 21:55:28,772 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-04 21:55:28,772 INFO L168 Benchmark]: Toolchain (without parser) took 838111.19 ms. Allocated memory was 318.8 MB in the beginning and 1.2 GB in the end (delta: 895.5 MB). Free memory was 281.3 MB in the beginning and 861.8 MB in the end (delta: -580.6 MB). Peak memory consumption was 316.3 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 318.8 MB. Free memory was 299.1 MB in the beginning and 299.0 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.43 ms. Allocated memory is still 318.8 MB. Free memory was 281.0 MB in the beginning and 282.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.98 ms. Allocated memory is still 318.8 MB. Free memory was 282.6 MB in the beginning and 280.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: Boogie Preprocessor took 29.54 ms. Allocated memory is still 318.8 MB. Free memory was 280.5 MB in the beginning and 279.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: RCFGBuilder took 399.37 ms. Allocated memory is still 318.8 MB. Free memory was 279.4 MB in the beginning and 255.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 INFO L168 Benchmark]: TraceAbstraction took 837313.11 ms. Allocated memory was 318.8 MB in the beginning and 1.2 GB in the end (delta: 895.5 MB). Free memory was 255.3 MB in the beginning and 861.8 MB in the end (delta: -606.5 MB). Peak memory consumption was 292.1 MB. Max. memory is 16.0 GB. [2021-06-04 21:55:28,773 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 318.8 MB. Free memory was 299.1 MB in the beginning and 299.0 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 324.43 ms. Allocated memory is still 318.8 MB. Free memory was 281.0 MB in the beginning and 282.6 MB in the end (delta: -1.5 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 40.98 ms. Allocated memory is still 318.8 MB. Free memory was 282.6 MB in the beginning and 280.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.54 ms. Allocated memory is still 318.8 MB. Free memory was 280.5 MB in the beginning and 279.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 399.37 ms. Allocated memory is still 318.8 MB. Free memory was 279.4 MB in the beginning and 255.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 837313.11 ms. Allocated memory was 318.8 MB in the beginning and 1.2 GB in the end (delta: 895.5 MB). Free memory was 255.3 MB in the beginning and 861.8 MB in the end (delta: -606.5 MB). Peak memory consumption was 292.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 713]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6453states) and FLOYD_HOARE automaton (currently 7 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - TimeoutResultAtElement [Line: 714]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (6453states) and FLOYD_HOARE automaton (currently 7 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 known predicates. - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (6453states) and FLOYD_HOARE automaton (currently 7 states, 38 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 42 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: 837220.6ms, OverallIterations: 561, TraceHistogramMax: 17, EmptinessCheckTime: 1820.7ms, AutomataDifference: 425759.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 54209 SDtfs, 704219 SDslu, 616486 SDs, 0 SdLazy, 114223 SolverSat, 121278 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68524.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114181 GetRequests, 78688 SyntacticMatches, 0 SemanticMatches, 35492 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617041 ImplicationChecksByTransitivity, 434689.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6453occurred in iteration=532, InterpolantAutomatonStates: 24671, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25958.0ms AutomataMinimizationTime, 560 MinimizatonAttempts, 691998 StatesRemovedByMinimization, 560 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6454.8ms SsaConstructionTime, 18487.4ms SatisfiabilityAnalysisTime, 228751.9ms InterpolantComputationTime, 157628 NumberOfCodeBlocks, 157628 NumberOfCodeBlocksAsserted, 4342 NumberOfCheckSat, 156512 ConstructedInterpolants, 0 QuantifiedInterpolants, 687520 SizeOfPredicates, 12980 NumberOfNonLiveVariables, 152560 ConjunctsInSsa, 16613 ConjunctsInUnsatCore, 1116 InterpolantComputations, 6 PerfectInterpolantSequences, 1/648050 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