/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:18:56,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:18:56,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:18:56,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:18:56,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:18:56,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:18:56,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:18:56,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:18:56,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:18:56,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:18:56,610 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:18:56,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:18:56,612 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:18:56,613 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:18:56,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:18:56,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:18:56,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:18:56,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:18:56,617 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:18:56,619 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:18:56,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:18:56,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:18:56,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:18:56,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:18:56,624 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 18:18:56,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:18:56,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:18:56,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:18:56,633 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 [2021-06-05 18:18:56,659 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:18:56,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:18:56,659 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:18:56,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:18:56,661 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:18:56,661 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:18:56,661 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:18:56,661 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:18:56,661 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:18:56,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:18:56,663 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:18:56,663 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:18:56,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:18:56,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:18:56,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:18:56,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:18:56,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:18:56,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:18:56,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:18:56,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:18:56,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:18:56,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:18:56,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:18:56,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:18:56,665 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:18:56,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:18:56,665 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:18:56,961 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:18:56,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:18:56,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:18:56,981 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:18:56,981 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:18:56,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-05 18:18:57,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2e83caa/5bd466b2dd844da8a672b6810082cf70/FLAGd68ae0db6 [2021-06-05 18:18:57,663 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:18:57,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2021-06-05 18:18:57,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2e83caa/5bd466b2dd844da8a672b6810082cf70/FLAGd68ae0db6 [2021-06-05 18:18:57,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2e83caa/5bd466b2dd844da8a672b6810082cf70 [2021-06-05 18:18:57,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:18:57,919 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:18:57,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:18:57,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:18:57,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:18:57,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:18:57" (1/1) ... [2021-06-05 18:18:57,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d057c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:57, skipping insertion in model container [2021-06-05 18:18:57,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:18:57" (1/1) ... [2021-06-05 18:18:57,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:18:57,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:18:58,267 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-06-05 18:18:58,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:18:58,275 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:18:58,305 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i[30962,30975] [2021-06-05 18:18:58,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:18:58,382 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:18:58,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58 WrapperNode [2021-06-05 18:18:58,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:18:58,385 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:18:58,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:18:58,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:18:58,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:18:58,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:18:58,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:18:58,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:18:58,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (1/1) ... [2021-06-05 18:18:58,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:18:58,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:18:58,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:18:58,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:18:58,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (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 [2021-06-05 18:18:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:18:58,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:18:58,524 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:18:58,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:18:58,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:18:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:18:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:18:58,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:18:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:18:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:18:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:18:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:18:58,528 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:18:58,831 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:18:58,831 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 18:18:58,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:18:58 BoogieIcfgContainer [2021-06-05 18:18:58,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:18:58,833 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:18:58,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:18:58,836 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:18:58,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:18:57" (1/3) ... [2021-06-05 18:18:58,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ca57f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:18:58, skipping insertion in model container [2021-06-05 18:18:58,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:18:58" (2/3) ... [2021-06-05 18:18:58,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50ca57f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:18:58, skipping insertion in model container [2021-06-05 18:18:58,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:18:58" (3/3) ... [2021-06-05 18:18:58,839 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2021-06-05 18:18:58,843 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:18:58,843 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:18:58,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 18:18:58,844 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:18:58,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,872 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,872 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,872 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,875 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,875 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,876 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,876 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,877 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,877 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,877 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,878 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,879 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,882 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,882 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,882 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,882 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,883 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,885 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,885 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,887 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,887 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,887 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,888 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,888 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,888 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,897 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,897 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,897 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,897 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,898 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,898 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:18:58,900 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 18:18:58,917 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 18:18:58,933 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:18:58,934 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:18:58,934 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:18:58,934 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:18:58,934 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:18:58,934 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:18:58,934 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:18:58,934 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:18:58,943 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 18:18:59,022 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) [2021-06-05 18:18:59,028 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) [2021-06-05 18:18:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 18:18:59,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:59,039 INFO L554 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] [2021-06-05 18:18:59,039 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 18:18:59,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:59,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963958913] [2021-06-05 18:18:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:59,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963958913] [2021-06-05 18:18:59,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963958913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:18:59,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:18:59,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:18:59,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898338378] [2021-06-05 18:18:59,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:18:59,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:59,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:18:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:18:59,462 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) [2021-06-05 18:18:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:59,640 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-05 18:18:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 18:18:59,642 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 [2021-06-05 18:18:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:59,667 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 18:18:59,667 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 18:18:59,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:18:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 18:18:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-05 18:18:59,766 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) [2021-06-05 18:18:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 18:18:59,771 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-05 18:18:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:59,771 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 18:18:59,771 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) [2021-06-05 18:18:59,771 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 18:18:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:18:59,775 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:59,775 INFO L554 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] [2021-06-05 18:18:59,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:18:59,775 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:59,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 18:18:59,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:59,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861530295] [2021-06-05 18:18:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:59,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861530295] [2021-06-05 18:18:59,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861530295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:18:59,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:18:59,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:18:59,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719900399] [2021-06-05 18:18:59,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:18:59,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:59,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:18:59,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:18:59,891 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) [2021-06-05 18:19:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,016 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 18:19:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:19:00,016 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 [2021-06-05 18:19:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,022 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 18:19:00,023 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 18:19:00,023 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:19:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 18:19:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 18:19:00,061 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) [2021-06-05 18:19:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 18:19:00,067 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 18:19:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,068 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 18:19:00,068 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) [2021-06-05 18:19:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 18:19:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:19:00,076 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,076 INFO L554 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] [2021-06-05 18:19:00,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:19:00,077 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-05 18:19:00,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566916768] [2021-06-05 18:19:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566916768] [2021-06-05 18:19:00,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566916768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:19:00,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:19:00,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:19:00,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831255718] [2021-06-05 18:19:00,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:19:00,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:19:00,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:19:00,203 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) [2021-06-05 18:19:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,410 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-05 18:19:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:19:00,411 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 [2021-06-05 18:19:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,415 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 18:19:00,415 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 18:19:00,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 18:19:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-05 18:19:00,435 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) [2021-06-05 18:19:00,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 18:19:00,437 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 18:19:00,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,438 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 18:19:00,438 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) [2021-06-05 18:19:00,438 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 18:19:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:19:00,441 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,441 INFO L554 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] [2021-06-05 18:19:00,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:19:00,441 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-05 18:19:00,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022757668] [2021-06-05 18:19:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022757668] [2021-06-05 18:19:00,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022757668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:19:00,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:19:00,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 18:19:00,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373341056] [2021-06-05 18:19:00,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:19:00,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:19:00,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:19:00,581 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) [2021-06-05 18:19:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,710 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 18:19:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:19:00,713 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 [2021-06-05 18:19:00,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,720 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 18:19:00,720 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 18:19:00,722 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:19:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 18:19:00,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 18:19:00,746 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) [2021-06-05 18:19:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 18:19:00,749 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 18:19:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,751 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 18:19:00,751 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) [2021-06-05 18:19:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 18:19:00,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:19:00,753 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,753 INFO L554 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] [2021-06-05 18:19:00,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:19:00,753 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-05 18:19:00,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719685057] [2021-06-05 18:19:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719685057] [2021-06-05 18:19:00,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719685057] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:19:00,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:19:00,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:19:00,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219823988] [2021-06-05 18:19:00,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:19:00,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:19:00,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:19:00,829 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) [2021-06-05 18:19:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,953 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 18:19:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:19:00,954 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 [2021-06-05 18:19:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,962 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 18:19:00,962 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 18:19:00,963 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:00,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 18:19:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 18:19:00,999 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) [2021-06-05 18:19:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 18:19:01,002 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 18:19:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:01,003 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 18:19:01,003 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) [2021-06-05 18:19:01,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 18:19:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:19:01,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:01,004 INFO L554 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] [2021-06-05 18:19:01,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:19:01,004 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:01,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-05 18:19:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:01,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093789492] [2021-06-05 18:19:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:01,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093789492] [2021-06-05 18:19:01,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093789492] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:19:01,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:19:01,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:19:01,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267439318] [2021-06-05 18:19:01,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:19:01,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:19:01,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:19:01,090 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) [2021-06-05 18:19:01,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:01,239 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-05 18:19:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:19:01,239 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 [2021-06-05 18:19:01,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:01,248 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 18:19:01,248 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 18:19:01,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 18:19:01,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-05 18:19:01,270 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) [2021-06-05 18:19:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-05 18:19:01,273 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-05 18:19:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:01,274 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-05 18:19:01,276 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) [2021-06-05 18:19:01,277 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-05 18:19:01,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:19:01,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:01,279 INFO L554 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] [2021-06-05 18:19:01,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:19:01,279 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-05 18:19:01,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:01,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144830435] [2021-06-05 18:19:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:01,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144830435] [2021-06-05 18:19:01,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144830435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389148493] [2021-06-05 18:19:01,402 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 [2021-06-05 18:19:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:01,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:19:01,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389148493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:01,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:19:01,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562280614] [2021-06-05 18:19:01,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:19:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:19:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:19:01,787 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:01,952 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-05 18:19:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:19:01,952 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2021-06-05 18:19:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:01,959 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 18:19:01,959 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 18:19:01,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:01,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 18:19:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-05 18:19:01,992 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) [2021-06-05 18:19:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-05 18:19:01,996 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-05 18:19:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:01,997 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-05 18:19:01,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-05 18:19:01,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:19:01,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:01,999 INFO L554 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] [2021-06-05 18:19:02,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 18:19:02,221 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:02,222 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-05 18:19:02,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:02,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343055575] [2021-06-05 18:19:02,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:02,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343055575] [2021-06-05 18:19:02,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343055575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269916998] [2021-06-05 18:19:02,296 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 [2021-06-05 18:19:02,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:02,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:02,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:19:02,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:02,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269916998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:02,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 18:19:02,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862719813] [2021-06-05 18:19:02,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:19:02,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:02,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:19:02,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:19:02,486 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) [2021-06-05 18:19:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:02,643 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-05 18:19:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:19:02,644 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 [2021-06-05 18:19:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:02,653 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 18:19:02,654 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 18:19:02,654 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 18:19:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-05 18:19:02,691 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) [2021-06-05 18:19:02,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-05 18:19:02,696 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-05 18:19:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:02,697 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-05 18:19:02,697 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) [2021-06-05 18:19:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-05 18:19:02,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:19:02,698 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:02,699 INFO L554 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] [2021-06-05 18:19:02,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:02,913 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:02,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:02,913 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-05 18:19:02,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:02,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52425210] [2021-06-05 18:19:02,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:02,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52425210] [2021-06-05 18:19:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52425210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926828752] [2021-06-05 18:19:02,990 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 [2021-06-05 18:19:03,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:19:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:03,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:19:03,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926828752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:03,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:19:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305923849] [2021-06-05 18:19:03,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:19:03,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:19:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:19:03,257 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) [2021-06-05 18:19:03,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:03,567 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-05 18:19:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:19:03,568 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 [2021-06-05 18:19:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:03,576 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 18:19:03,576 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 18:19:03,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:03,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 18:19:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-05 18:19:03,604 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) [2021-06-05 18:19:03,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-05 18:19:03,609 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-05 18:19:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:03,609 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-05 18:19:03,609 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) [2021-06-05 18:19:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-05 18:19:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:19:03,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:03,611 INFO L554 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] [2021-06-05 18:19:03,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:03,825 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-05 18:19:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:03,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111792336] [2021-06-05 18:19:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:03,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111792336] [2021-06-05 18:19:03,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111792336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626621412] [2021-06-05 18:19:03,944 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 [2021-06-05 18:19:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:19:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626621412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:04,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:19:04,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932587370] [2021-06-05 18:19:04,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:19:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:19:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:04,157 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) [2021-06-05 18:19:04,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:04,327 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-05 18:19:04,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:19:04,328 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 [2021-06-05 18:19:04,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:04,335 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 18:19:04,336 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 18:19:04,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 18:19:04,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-05 18:19:04,363 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) [2021-06-05 18:19:04,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-05 18:19:04,368 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-05 18:19:04,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:04,368 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-05 18:19:04,368 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) [2021-06-05 18:19:04,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-05 18:19:04,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:19:04,370 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:04,370 INFO L554 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] [2021-06-05 18:19:04,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:04,585 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-05 18:19:04,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:04,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364985218] [2021-06-05 18:19:04,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:04,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364985218] [2021-06-05 18:19:04,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364985218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014972082] [2021-06-05 18:19:04,650 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 [2021-06-05 18:19:04,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:04,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:04,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:19:04,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014972082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:04,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:19:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977975449] [2021-06-05 18:19:04,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:19:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:04,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:19:04,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:19:04,797 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) [2021-06-05 18:19:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:04,943 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-05 18:19:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:19:04,944 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 [2021-06-05 18:19:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:04,951 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 18:19:04,952 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 18:19:04,952 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:04,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 18:19:04,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-05 18:19:04,982 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) [2021-06-05 18:19:04,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-05 18:19:04,987 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-05 18:19:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:04,987 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-05 18:19:04,988 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) [2021-06-05 18:19:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-05 18:19:04,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:19:04,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:04,990 INFO L554 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] [2021-06-05 18:19:05,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 18:19:05,213 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:05,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:05,213 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-05 18:19:05,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:05,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875407206] [2021-06-05 18:19:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:05,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875407206] [2021-06-05 18:19:05,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875407206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:05,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385552668] [2021-06-05 18:19:05,287 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 [2021-06-05 18:19:05,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:19:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:05,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:19:05,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:05,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385552668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:05,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:05,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:19:05,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616481688] [2021-06-05 18:19:05,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:19:05,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:05,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:19:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:19:05,478 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) [2021-06-05 18:19:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:05,686 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-05 18:19:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:19:05,686 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 [2021-06-05 18:19:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:05,691 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 18:19:05,691 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 18:19:05,692 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:05,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 18:19:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-05 18:19:05,718 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) [2021-06-05 18:19:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-05 18:19:05,722 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-05 18:19:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:05,723 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-05 18:19:05,723 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) [2021-06-05 18:19:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-05 18:19:05,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:19:05,725 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:05,725 INFO L554 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] [2021-06-05 18:19:05,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:05,949 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:05,950 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-05 18:19:05,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:05,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026241280] [2021-06-05 18:19:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026241280] [2021-06-05 18:19:06,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026241280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567713148] [2021-06-05 18:19:06,024 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 [2021-06-05 18:19:06,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:06,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:06,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:19:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567713148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:06,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:19:06,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804452793] [2021-06-05 18:19:06,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:19:06,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:19:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:19:06,202 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) [2021-06-05 18:19:06,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:06,369 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-05 18:19:06,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:19:06,369 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 [2021-06-05 18:19:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:06,376 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 18:19:06,376 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 18:19:06,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 18:19:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-05 18:19:06,411 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) [2021-06-05 18:19:06,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-05 18:19:06,415 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-05 18:19:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:06,416 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-05 18:19:06,416 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) [2021-06-05 18:19:06,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-05 18:19:06,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:19:06,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:06,418 INFO L554 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] [2021-06-05 18:19:06,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,641 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:06,642 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-05 18:19:06,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:06,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684041942] [2021-06-05 18:19:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684041942] [2021-06-05 18:19:06,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684041942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414922282] [2021-06-05 18:19:06,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:06,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 18:19:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:19:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414922282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:06,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:19:06,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768194187] [2021-06-05 18:19:06,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:19:06,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:06,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:19:06,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:19:06,899 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) [2021-06-05 18:19:07,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:07,131 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-05 18:19:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:19:07,132 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 [2021-06-05 18:19:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:07,136 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 18:19:07,136 INFO L226 Difference]: Without dead ends: 1706 [2021-06-05 18:19:07,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-05 18:19:07,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-05 18:19:07,164 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) [2021-06-05 18:19:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-05 18:19:07,167 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-05 18:19:07,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:07,167 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-05 18:19:07,168 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) [2021-06-05 18:19:07,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-05 18:19:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:19:07,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:07,170 INFO L554 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] [2021-06-05 18:19:07,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 18:19:07,389 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:07,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-05 18:19:07,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:07,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107670958] [2021-06-05 18:19:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:07,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:07,472 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:07,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107670958] [2021-06-05 18:19:07,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107670958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519515249] [2021-06-05 18:19:07,472 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 [2021-06-05 18:19:07,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 18:19:07,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:07,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:19:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:07,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519515249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:07,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:19:07,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029639611] [2021-06-05 18:19:07,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:19:07,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:07,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:19:07,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:19:07,654 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) [2021-06-05 18:19:07,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:07,832 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-05 18:19:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:19:07,833 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 [2021-06-05 18:19:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:07,836 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 18:19:07,836 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 18:19:07,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 18:19:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-05 18:19:07,859 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) [2021-06-05 18:19:07,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-05 18:19:07,862 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-05 18:19:07,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:07,863 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-05 18:19:07,863 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) [2021-06-05 18:19:07,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-05 18:19:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:19:07,865 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:07,865 INFO L554 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] [2021-06-05 18:19:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:19:08,088 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-05 18:19:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:08,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794420754] [2021-06-05 18:19:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:08,184 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:08,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794420754] [2021-06-05 18:19:08,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794420754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11077797] [2021-06-05 18:19:08,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:19:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11077797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:08,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:19:08,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10712515] [2021-06-05 18:19:08,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:19:08,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:19:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:08,428 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) [2021-06-05 18:19:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:08,679 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-05 18:19:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:19:08,679 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 [2021-06-05 18:19:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:08,683 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 18:19:08,683 INFO L226 Difference]: Without dead ends: 1841 [2021-06-05 18:19:08,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 219.6ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-05 18:19:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-05 18:19:08,715 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) [2021-06-05 18:19:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-05 18:19:08,719 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-05 18:19:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:08,719 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-05 18:19:08,720 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) [2021-06-05 18:19:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-05 18:19:08,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:19:08,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:08,722 INFO L554 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] [2021-06-05 18:19:08,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:19:08,941 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-05 18:19:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:08,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340871744] [2021-06-05 18:19:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:09,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340871744] [2021-06-05 18:19:09,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340871744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485806076] [2021-06-05 18:19:09,023 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 [2021-06-05 18:19:09,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:09,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:09,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:19:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485806076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:09,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:19:09,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793712854] [2021-06-05 18:19:09,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:19:09,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:09,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:19:09,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:19:09,218 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) [2021-06-05 18:19:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:09,427 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-05 18:19:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:19:09,428 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 [2021-06-05 18:19:09,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:09,433 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 18:19:09,434 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 18:19:09,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 18:19:09,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-05 18:19:09,469 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) [2021-06-05 18:19:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-05 18:19:09,473 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-05 18:19:09,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:09,474 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-05 18:19:09,474 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) [2021-06-05 18:19:09,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-05 18:19:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:19:09,476 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:09,476 INFO L554 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] [2021-06-05 18:19:09,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:19:09,700 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:09,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-05 18:19:09,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:09,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908055269] [2021-06-05 18:19:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:09,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908055269] [2021-06-05 18:19:09,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908055269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878840931] [2021-06-05 18:19:09,779 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 [2021-06-05 18:19:09,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:19:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:19:09,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878840931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:09,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:19:09,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168202305] [2021-06-05 18:19:09,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:19:09,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:09,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:19:09,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:09,948 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) [2021-06-05 18:19:10,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:10,310 INFO L93 Difference]: Finished difference Result 2726 states and 7296 transitions. [2021-06-05 18:19:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:10,311 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 [2021-06-05 18:19:10,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:10,315 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 18:19:10,315 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 18:19:10,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 18:19:10,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1678. [2021-06-05 18:19:10,347 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) [2021-06-05 18:19:10,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4683 transitions. [2021-06-05 18:19:10,352 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4683 transitions. Word has length 55 [2021-06-05 18:19:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:10,352 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4683 transitions. [2021-06-05 18:19:10,352 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) [2021-06-05 18:19:10,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4683 transitions. [2021-06-05 18:19:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:10,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:10,355 INFO L554 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] [2021-06-05 18:19:10,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:19:10,573 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:10,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:10,573 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-05 18:19:10,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:10,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500767239] [2021-06-05 18:19:10,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:10,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500767239] [2021-06-05 18:19:10,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500767239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562137847] [2021-06-05 18:19:10,675 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 [2021-06-05 18:19:10,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:10,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:10,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562137847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:10,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:19:10,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700425752] [2021-06-05 18:19:10,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:10,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:10,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:10,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:10,871 INFO L87 Difference]: Start difference. First operand 1678 states and 4683 transitions. Second operand has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:11,092 INFO L93 Difference]: Finished difference Result 2468 states and 6583 transitions. [2021-06-05 18:19:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:19:11,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:19:11,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:11,096 INFO L225 Difference]: With dead ends: 2468 [2021-06-05 18:19:11,097 INFO L226 Difference]: Without dead ends: 2134 [2021-06-05 18:19:11,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:19:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-05 18:19:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1763. [2021-06-05 18:19:11,126 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) [2021-06-05 18:19:11,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 4853 transitions. [2021-06-05 18:19:11,129 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 4853 transitions. Word has length 60 [2021-06-05 18:19:11,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:11,129 INFO L482 AbstractCegarLoop]: Abstraction has 1763 states and 4853 transitions. [2021-06-05 18:19:11,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.285714285714286) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 4853 transitions. [2021-06-05 18:19:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:11,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:11,132 INFO L554 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] [2021-06-05 18:19:11,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:11,353 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:11,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:11,353 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-05 18:19:11,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:11,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415594065] [2021-06-05 18:19:11,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415594065] [2021-06-05 18:19:11,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415594065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4220011] [2021-06-05 18:19:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:11,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:19:11,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:11,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:11,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4220011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:11,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 18:19:11,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646987770] [2021-06-05 18:19:11,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:19:11,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:19:11,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:19:11,609 INFO L87 Difference]: Start difference. First operand 1763 states and 4853 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:11,769 INFO L93 Difference]: Finished difference Result 2561 states and 6577 transitions. [2021-06-05 18:19:11,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:19:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:19:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:11,773 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 18:19:11,773 INFO L226 Difference]: Without dead ends: 2291 [2021-06-05 18:19:11,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:11,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2021-06-05 18:19:11,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 1778. [2021-06-05 18:19:11,804 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) [2021-06-05 18:19:11,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:19:11,807 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:19:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:11,807 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:19:11,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:19:11,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:11,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:11,810 INFO L554 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] [2021-06-05 18:19:12,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,034 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-05 18:19:12,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432028900] [2021-06-05 18:19:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432028900] [2021-06-05 18:19:12,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432028900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597664269] [2021-06-05 18:19:12,167 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 [2021-06-05 18:19:12,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:19:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:12,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597664269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:12,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:19:12,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936314959] [2021-06-05 18:19:12,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:19:12,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:12,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:19:12,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:12,354 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) [2021-06-05 18:19:12,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:12,585 INFO L93 Difference]: Finished difference Result 2446 states and 6347 transitions. [2021-06-05 18:19:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:19:12,585 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 [2021-06-05 18:19:12,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:12,588 INFO L225 Difference]: With dead ends: 2446 [2021-06-05 18:19:12,588 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 18:19:12,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 210.1ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 18:19:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1778. [2021-06-05 18:19:12,612 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) [2021-06-05 18:19:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:19:12,615 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:19:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:12,615 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:19:12,616 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) [2021-06-05 18:19:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:19:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:12,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,619 INFO L554 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] [2021-06-05 18:19:12,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:19:12,839 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-05 18:19:12,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687082053] [2021-06-05 18:19:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687082053] [2021-06-05 18:19:12,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687082053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067343317] [2021-06-05 18:19:12,924 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 [2021-06-05 18:19:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067343317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 18:19:13,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122143776] [2021-06-05 18:19:13,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:19:13,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:19:13,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:19:13,087 INFO L87 Difference]: Start difference. First operand 1778 states and 4883 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:13,259 INFO L93 Difference]: Finished difference Result 2421 states and 6297 transitions. [2021-06-05 18:19:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:19:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:19:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:13,263 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 18:19:13,263 INFO L226 Difference]: Without dead ends: 2151 [2021-06-05 18:19:13,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2021-06-05 18:19:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 1778. [2021-06-05 18:19:13,287 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) [2021-06-05 18:19:13,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4883 transitions. [2021-06-05 18:19:13,290 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4883 transitions. Word has length 60 [2021-06-05 18:19:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:13,291 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4883 transitions. [2021-06-05 18:19:13,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4883 transitions. [2021-06-05 18:19:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:13,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:13,293 INFO L554 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] [2021-06-05 18:19:13,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,509 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:13,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-05 18:19:13,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:13,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975381040] [2021-06-05 18:19:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:13,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975381040] [2021-06-05 18:19:13,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975381040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410446603] [2021-06-05 18:19:13,606 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 [2021-06-05 18:19:13,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:13,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410446603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:19:13,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252936059] [2021-06-05 18:19:13,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:19:13,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:19:13,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:19:13,794 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) [2021-06-05 18:19:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,090 INFO L93 Difference]: Finished difference Result 2431 states and 6347 transitions. [2021-06-05 18:19:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:14,090 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 [2021-06-05 18:19:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:14,093 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 18:19:14,093 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 18:19:14,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:19:14,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 18:19:14,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1778. [2021-06-05 18:19:14,117 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) [2021-06-05 18:19:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 4888 transitions. [2021-06-05 18:19:14,120 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 4888 transitions. Word has length 60 [2021-06-05 18:19:14,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:14,121 INFO L482 AbstractCegarLoop]: Abstraction has 1778 states and 4888 transitions. [2021-06-05 18:19:14,121 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) [2021-06-05 18:19:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 4888 transitions. [2021-06-05 18:19:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:14,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:14,123 INFO L554 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] [2021-06-05 18:19:14,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:19:14,337 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-05 18:19:14,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:14,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726036572] [2021-06-05 18:19:14,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726036572] [2021-06-05 18:19:14,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726036572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246575609] [2021-06-05 18:19:14,431 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 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 [2021-06-05 18:19:14,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:19:14,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:14,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:14,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246575609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:14,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 18:19:14,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533464905] [2021-06-05 18:19:14,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:19:14,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:14,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:19:14,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:19:14,601 INFO L87 Difference]: Start difference. First operand 1778 states and 4888 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,832 INFO L93 Difference]: Finished difference Result 3198 states and 8521 transitions. [2021-06-05 18:19:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:19:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:19:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:14,836 INFO L225 Difference]: With dead ends: 3198 [2021-06-05 18:19:14,836 INFO L226 Difference]: Without dead ends: 2928 [2021-06-05 18:19:14,836 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2021-06-05 18:19:14,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1958. [2021-06-05 18:19:14,870 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) [2021-06-05 18:19:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 5447 transitions. [2021-06-05 18:19:14,874 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 5447 transitions. Word has length 60 [2021-06-05 18:19:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:14,874 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 5447 transitions. [2021-06-05 18:19:14,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 5447 transitions. [2021-06-05 18:19:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:19:14,877 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:14,877 INFO L554 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] [2021-06-05 18:19:15,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:19:15,101 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:15,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-05 18:19:15,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:15,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516672354] [2021-06-05 18:19:15,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516672354] [2021-06-05 18:19:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516672354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656251013] [2021-06-05 18:19:15,182 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 [2021-06-05 18:19:15,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:15,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:15,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:19:15,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656251013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:15,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:19:15,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746717455] [2021-06-05 18:19:15,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:19:15,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:15,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:19:15,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:19:15,347 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) [2021-06-05 18:19:15,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:15,737 INFO L93 Difference]: Finished difference Result 3021 states and 8021 transitions. [2021-06-05 18:19:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:15,738 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 [2021-06-05 18:19:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:15,740 INFO L225 Difference]: With dead ends: 3021 [2021-06-05 18:19:15,740 INFO L226 Difference]: Without dead ends: 2446 [2021-06-05 18:19:15,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 310.9ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:19:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2021-06-05 18:19:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 1603. [2021-06-05 18:19:15,768 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) [2021-06-05 18:19:15,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 4368 transitions. [2021-06-05 18:19:15,772 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 4368 transitions. Word has length 60 [2021-06-05 18:19:15,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:15,772 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 4368 transitions. [2021-06-05 18:19:15,772 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) [2021-06-05 18:19:15,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 4368 transitions. [2021-06-05 18:19:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:15,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:15,774 INFO L554 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] [2021-06-05 18:19:15,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 18:19:15,997 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:15,997 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-05 18:19:15,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:15,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209480660] [2021-06-05 18:19:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:16,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209480660] [2021-06-05 18:19:16,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209480660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782171834] [2021-06-05 18:19:16,117 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 [2021-06-05 18:19:16,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:19:16,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:16,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:16,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:16,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782171834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:16,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:19:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088513874] [2021-06-05 18:19:16,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:19:16,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:19:16,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:19:16,305 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) [2021-06-05 18:19:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:16,479 INFO L93 Difference]: Finished difference Result 2321 states and 6007 transitions. [2021-06-05 18:19:16,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:19:16,479 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 [2021-06-05 18:19:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:16,482 INFO L225 Difference]: With dead ends: 2321 [2021-06-05 18:19:16,482 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 18:19:16,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 18:19:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1678. [2021-06-05 18:19:16,503 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) [2021-06-05 18:19:16,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 4593 transitions. [2021-06-05 18:19:16,506 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 4593 transitions. Word has length 65 [2021-06-05 18:19:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:16,506 INFO L482 AbstractCegarLoop]: Abstraction has 1678 states and 4593 transitions. [2021-06-05 18:19:16,506 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) [2021-06-05 18:19:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 4593 transitions. [2021-06-05 18:19:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:16,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:16,508 INFO L554 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] [2021-06-05 18:19:16,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:19:16,721 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-05 18:19:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:16,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235649551] [2021-06-05 18:19:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235649551] [2021-06-05 18:19:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235649551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850571728] [2021-06-05 18:19:16,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:16,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:19:16,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:16,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850571728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:17,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:19:17,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394802805] [2021-06-05 18:19:17,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:17,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:17,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:17,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:17,021 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) [2021-06-05 18:19:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:17,311 INFO L93 Difference]: Finished difference Result 2491 states and 6422 transitions. [2021-06-05 18:19:17,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:17,312 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 [2021-06-05 18:19:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:17,315 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 18:19:17,315 INFO L226 Difference]: Without dead ends: 2221 [2021-06-05 18:19:17,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:19:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-06-05 18:19:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1753. [2021-06-05 18:19:17,339 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) [2021-06-05 18:19:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4818 transitions. [2021-06-05 18:19:17,342 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4818 transitions. Word has length 65 [2021-06-05 18:19:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:17,342 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4818 transitions. [2021-06-05 18:19:17,342 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) [2021-06-05 18:19:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4818 transitions. [2021-06-05 18:19:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:17,346 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:17,346 INFO L554 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] [2021-06-05 18:19:17,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:19:17,569 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-05 18:19:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:17,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830590656] [2021-06-05 18:19:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:17,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830590656] [2021-06-05 18:19:17,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830590656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575747768] [2021-06-05 18:19:17,666 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 [2021-06-05 18:19:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:17,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575747768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:17,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:19:17,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895123620] [2021-06-05 18:19:17,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:19:17,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:17,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:19:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:19:17,889 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) [2021-06-05 18:19:18,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:18,136 INFO L93 Difference]: Finished difference Result 2566 states and 6677 transitions. [2021-06-05 18:19:18,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:19:18,137 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 [2021-06-05 18:19:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:18,140 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 18:19:18,140 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 18:19:18,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:19:18,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 18:19:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1828. [2021-06-05 18:19:18,167 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) [2021-06-05 18:19:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 5058 transitions. [2021-06-05 18:19:18,170 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 5058 transitions. Word has length 65 [2021-06-05 18:19:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:18,170 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 5058 transitions. [2021-06-05 18:19:18,171 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) [2021-06-05 18:19:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 5058 transitions. [2021-06-05 18:19:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:18,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:18,173 INFO L554 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] [2021-06-05 18:19:18,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:18,389 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:18,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-05 18:19:18,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:18,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874331149] [2021-06-05 18:19:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:18,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874331149] [2021-06-05 18:19:18,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874331149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888392320] [2021-06-05 18:19:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:18,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:18,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:18,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888392320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:18,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:19:18,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096761129] [2021-06-05 18:19:18,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:18,671 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) [2021-06-05 18:19:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:19,022 INFO L93 Difference]: Finished difference Result 3144 states and 8303 transitions. [2021-06-05 18:19:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:19,023 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 [2021-06-05 18:19:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:19,026 INFO L225 Difference]: With dead ends: 3144 [2021-06-05 18:19:19,026 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 18:19:19,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 306.7ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:19:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 18:19:19,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 1903. [2021-06-05 18:19:19,051 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) [2021-06-05 18:19:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5288 transitions. [2021-06-05 18:19:19,055 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5288 transitions. Word has length 65 [2021-06-05 18:19:19,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:19,055 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5288 transitions. [2021-06-05 18:19:19,055 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) [2021-06-05 18:19:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5288 transitions. [2021-06-05 18:19:19,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:19,057 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:19,057 INFO L554 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] [2021-06-05 18:19:19,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:19:19,280 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:19,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-05 18:19:19,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:19,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719986085] [2021-06-05 18:19:19,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:19,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:19,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719986085] [2021-06-05 18:19:19,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719986085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122782678] [2021-06-05 18:19:19,354 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 [2021-06-05 18:19:19,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:19:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:19,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122782678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:19,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:19:19,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590253117] [2021-06-05 18:19:19,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:19:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:19:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:19:19,528 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) [2021-06-05 18:19:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:19,795 INFO L93 Difference]: Finished difference Result 3348 states and 8971 transitions. [2021-06-05 18:19:19,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:19,795 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 [2021-06-05 18:19:19,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:19,798 INFO L225 Difference]: With dead ends: 3348 [2021-06-05 18:19:19,798 INFO L226 Difference]: Without dead ends: 3078 [2021-06-05 18:19:19,799 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:19:19,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2021-06-05 18:19:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 2083. [2021-06-05 18:19:19,824 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) [2021-06-05 18:19:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 5847 transitions. [2021-06-05 18:19:19,827 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 5847 transitions. Word has length 65 [2021-06-05 18:19:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:19,827 INFO L482 AbstractCegarLoop]: Abstraction has 2083 states and 5847 transitions. [2021-06-05 18:19:19,827 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) [2021-06-05 18:19:19,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 5847 transitions. [2021-06-05 18:19:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:19:19,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:19,829 INFO L554 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] [2021-06-05 18:19:20,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:20,030 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:20,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:20,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-05 18:19:20,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:20,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786155127] [2021-06-05 18:19:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:20,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786155127] [2021-06-05 18:19:20,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786155127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963229052] [2021-06-05 18:19:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:20,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:20,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:20,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:19:20,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963229052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:20,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:19:20,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312736807] [2021-06-05 18:19:20,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:20,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:20,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:20,273 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) [2021-06-05 18:19:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:20,616 INFO L93 Difference]: Finished difference Result 3216 states and 8636 transitions. [2021-06-05 18:19:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:19:20,616 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 [2021-06-05 18:19:20,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:20,619 INFO L225 Difference]: With dead ends: 3216 [2021-06-05 18:19:20,619 INFO L226 Difference]: Without dead ends: 2641 [2021-06-05 18:19:20,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 308.1ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:20,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2021-06-05 18:19:20,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 1524. [2021-06-05 18:19:20,641 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) [2021-06-05 18:19:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 4156 transitions. [2021-06-05 18:19:20,643 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 4156 transitions. Word has length 65 [2021-06-05 18:19:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:20,643 INFO L482 AbstractCegarLoop]: Abstraction has 1524 states and 4156 transitions. [2021-06-05 18:19:20,643 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) [2021-06-05 18:19:20,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 4156 transitions. [2021-06-05 18:19:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:20,645 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:20,645 INFO L554 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] [2021-06-05 18:19:20,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 18:19:20,869 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:20,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:20,869 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-05 18:19:20,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:20,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599610832] [2021-06-05 18:19:20,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:20,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599610832] [2021-06-05 18:19:20,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599610832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679320164] [2021-06-05 18:19:20,997 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 [2021-06-05 18:19:21,069 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:19:21,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:21,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:21,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679320164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:21,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 18:19:21,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244220934] [2021-06-05 18:19:21,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:21,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:21,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:21,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:21,207 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) [2021-06-05 18:19:21,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:21,434 INFO L93 Difference]: Finished difference Result 2364 states and 6156 transitions. [2021-06-05 18:19:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:21,434 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 [2021-06-05 18:19:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:21,436 INFO L225 Difference]: With dead ends: 2364 [2021-06-05 18:19:21,436 INFO L226 Difference]: Without dead ends: 2030 [2021-06-05 18:19:21,436 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:19:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2021-06-05 18:19:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1609. [2021-06-05 18:19:21,455 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) [2021-06-05 18:19:21,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4326 transitions. [2021-06-05 18:19:21,490 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4326 transitions. Word has length 70 [2021-06-05 18:19:21,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:21,490 INFO L482 AbstractCegarLoop]: Abstraction has 1609 states and 4326 transitions. [2021-06-05 18:19:21,490 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) [2021-06-05 18:19:21,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4326 transitions. [2021-06-05 18:19:21,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:21,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:21,492 INFO L554 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] [2021-06-05 18:19:21,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:21,697 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-05 18:19:21,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:21,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959966638] [2021-06-05 18:19:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959966638] [2021-06-05 18:19:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959966638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599400010] [2021-06-05 18:19:21,803 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 [2021-06-05 18:19:21,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:19:21,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:21,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:21,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599400010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:21,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:19:21,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009857451] [2021-06-05 18:19:21,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:21,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:21,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:21,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:21,985 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) [2021-06-05 18:19:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:22,148 INFO L93 Difference]: Finished difference Result 2686 states and 6737 transitions. [2021-06-05 18:19:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:19:22,149 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 [2021-06-05 18:19:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:22,151 INFO L225 Difference]: With dead ends: 2686 [2021-06-05 18:19:22,151 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 18:19:22,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:22,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 18:19:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 1753. [2021-06-05 18:19:22,167 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) [2021-06-05 18:19:22,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4743 transitions. [2021-06-05 18:19:22,169 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4743 transitions. Word has length 70 [2021-06-05 18:19:22,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:22,170 INFO L482 AbstractCegarLoop]: Abstraction has 1753 states and 4743 transitions. [2021-06-05 18:19:22,170 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) [2021-06-05 18:19:22,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4743 transitions. [2021-06-05 18:19:22,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:22,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:22,172 INFO L554 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] [2021-06-05 18:19:22,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 18:19:22,385 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:22,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:22,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-05 18:19:22,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:22,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277711784] [2021-06-05 18:19:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:22,506 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:22,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277711784] [2021-06-05 18:19:22,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277711784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131747816] [2021-06-05 18:19:22,506 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 [2021-06-05 18:19:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:22,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131747816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:22,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:19:22,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914115338] [2021-06-05 18:19:22,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:22,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:22,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:22,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:22,689 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) [2021-06-05 18:19:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:22,908 INFO L93 Difference]: Finished difference Result 2646 states and 6732 transitions. [2021-06-05 18:19:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:22,909 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 [2021-06-05 18:19:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:22,911 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 18:19:22,911 INFO L226 Difference]: Without dead ends: 2376 [2021-06-05 18:19:22,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:22,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2021-06-05 18:19:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1828. [2021-06-05 18:19:22,928 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) [2021-06-05 18:19:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1828 states to 1828 states and 4968 transitions. [2021-06-05 18:19:22,930 INFO L78 Accepts]: Start accepts. Automaton has 1828 states and 4968 transitions. Word has length 70 [2021-06-05 18:19:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:22,930 INFO L482 AbstractCegarLoop]: Abstraction has 1828 states and 4968 transitions. [2021-06-05 18:19:22,930 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) [2021-06-05 18:19:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1828 states and 4968 transitions. [2021-06-05 18:19:22,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:22,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:22,933 INFO L554 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] [2021-06-05 18:19:23,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:23,144 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:23,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:23,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-05 18:19:23,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:23,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713545692] [2021-06-05 18:19:23,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713545692] [2021-06-05 18:19:23,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713545692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976659172] [2021-06-05 18:19:23,247 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 [2021-06-05 18:19:23,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:23,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976659172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:23,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:19:23,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833629641] [2021-06-05 18:19:23,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:23,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:23,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:23,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:23,448 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) [2021-06-05 18:19:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:23,748 INFO L93 Difference]: Finished difference Result 2696 states and 6907 transitions. [2021-06-05 18:19:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:19:23,749 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 [2021-06-05 18:19:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:23,752 INFO L225 Difference]: With dead ends: 2696 [2021-06-05 18:19:23,752 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 18:19:23,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:19:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 18:19:23,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1903. [2021-06-05 18:19:23,784 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) [2021-06-05 18:19:23,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1903 states to 1903 states and 5193 transitions. [2021-06-05 18:19:23,788 INFO L78 Accepts]: Start accepts. Automaton has 1903 states and 5193 transitions. Word has length 70 [2021-06-05 18:19:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:23,788 INFO L482 AbstractCegarLoop]: Abstraction has 1903 states and 5193 transitions. [2021-06-05 18:19:23,788 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) [2021-06-05 18:19:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1903 states and 5193 transitions. [2021-06-05 18:19:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:23,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:23,792 INFO L554 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] [2021-06-05 18:19:24,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:19:24,016 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:24,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-05 18:19:24,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:24,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694052094] [2021-06-05 18:19:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694052094] [2021-06-05 18:19:24,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694052094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981552368] [2021-06-05 18:19:24,118 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 [2021-06-05 18:19:24,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:19:24,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:24,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:24,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981552368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:24,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:19:24,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987493258] [2021-06-05 18:19:24,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:24,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:24,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:24,293 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) [2021-06-05 18:19:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:24,562 INFO L93 Difference]: Finished difference Result 2721 states and 7032 transitions. [2021-06-05 18:19:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:19:24,562 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 [2021-06-05 18:19:24,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:24,565 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 18:19:24,565 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 18:19:24,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:19:24,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 18:19:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1978. [2021-06-05 18:19:24,589 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) [2021-06-05 18:19:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 5418 transitions. [2021-06-05 18:19:24,591 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 5418 transitions. Word has length 70 [2021-06-05 18:19:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:24,591 INFO L482 AbstractCegarLoop]: Abstraction has 1978 states and 5418 transitions. [2021-06-05 18:19:24,591 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) [2021-06-05 18:19:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 5418 transitions. [2021-06-05 18:19:24,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:24,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:24,594 INFO L554 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] [2021-06-05 18:19:24,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,809 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-05 18:19:24,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:24,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190345170] [2021-06-05 18:19:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:24,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190345170] [2021-06-05 18:19:24,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190345170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546830160] [2021-06-05 18:19:24,909 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 [2021-06-05 18:19:24,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:24,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546830160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:25,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:19:25,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764085893] [2021-06-05 18:19:25,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:25,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:25,072 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) [2021-06-05 18:19:25,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:25,279 INFO L93 Difference]: Finished difference Result 2791 states and 7277 transitions. [2021-06-05 18:19:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:19:25,279 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 [2021-06-05 18:19:25,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:25,282 INFO L225 Difference]: With dead ends: 2791 [2021-06-05 18:19:25,282 INFO L226 Difference]: Without dead ends: 2521 [2021-06-05 18:19:25,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:25,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2521 states. [2021-06-05 18:19:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2521 to 2053. [2021-06-05 18:19:25,300 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) [2021-06-05 18:19:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5658 transitions. [2021-06-05 18:19:25,303 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5658 transitions. Word has length 70 [2021-06-05 18:19:25,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:25,303 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5658 transitions. [2021-06-05 18:19:25,303 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) [2021-06-05 18:19:25,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5658 transitions. [2021-06-05 18:19:25,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:25,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:25,305 INFO L554 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] [2021-06-05 18:19:25,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:19:25,506 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:25,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:25,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-05 18:19:25,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:25,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207880402] [2021-06-05 18:19:25,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207880402] [2021-06-05 18:19:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207880402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099489529] [2021-06-05 18:19:25,618 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 [2021-06-05 18:19:25,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:19:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099489529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:25,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:19:25,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219072890] [2021-06-05 18:19:25,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:25,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:25,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:25,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:25,841 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) [2021-06-05 18:19:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:26,248 INFO L93 Difference]: Finished difference Result 3369 states and 8903 transitions. [2021-06-05 18:19:26,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:26,249 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 [2021-06-05 18:19:26,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:26,252 INFO L225 Difference]: With dead ends: 3369 [2021-06-05 18:19:26,252 INFO L226 Difference]: Without dead ends: 2746 [2021-06-05 18:19:26,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-06-05 18:19:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2128. [2021-06-05 18:19:26,281 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) [2021-06-05 18:19:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 5888 transitions. [2021-06-05 18:19:26,285 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 5888 transitions. Word has length 70 [2021-06-05 18:19:26,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:26,286 INFO L482 AbstractCegarLoop]: Abstraction has 2128 states and 5888 transitions. [2021-06-05 18:19:26,286 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) [2021-06-05 18:19:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 5888 transitions. [2021-06-05 18:19:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:26,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:26,289 INFO L554 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] [2021-06-05 18:19:26,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:19:26,513 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-05 18:19:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723909495] [2021-06-05 18:19:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723909495] [2021-06-05 18:19:26,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723909495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751994467] [2021-06-05 18:19:26,602 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 [2021-06-05 18:19:26,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:19:26,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:26,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751994467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:26,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:19:26,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377006450] [2021-06-05 18:19:26,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:19:26,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:26,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:19:26,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:19:26,775 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) [2021-06-05 18:19:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:27,033 INFO L93 Difference]: Finished difference Result 3598 states and 9621 transitions. [2021-06-05 18:19:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:27,033 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 [2021-06-05 18:19:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:27,037 INFO L225 Difference]: With dead ends: 3598 [2021-06-05 18:19:27,037 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 18:19:27,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:19:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 18:19:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2308. [2021-06-05 18:19:27,059 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) [2021-06-05 18:19:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 6447 transitions. [2021-06-05 18:19:27,062 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 6447 transitions. Word has length 70 [2021-06-05 18:19:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:27,062 INFO L482 AbstractCegarLoop]: Abstraction has 2308 states and 6447 transitions. [2021-06-05 18:19:27,062 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) [2021-06-05 18:19:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 6447 transitions. [2021-06-05 18:19:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:19:27,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:27,065 INFO L554 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] [2021-06-05 18:19:27,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:19:27,277 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:27,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-05 18:19:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:27,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271232881] [2021-06-05 18:19:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:27,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271232881] [2021-06-05 18:19:27,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271232881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282594643] [2021-06-05 18:19:27,364 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 [2021-06-05 18:19:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:19:27,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282594643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:27,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:19:27,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996019486] [2021-06-05 18:19:27,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:27,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:27,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:27,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:27,565 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) [2021-06-05 18:19:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:27,981 INFO L93 Difference]: Finished difference Result 3421 states and 9121 transitions. [2021-06-05 18:19:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:27,981 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 [2021-06-05 18:19:27,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:27,984 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:19:27,984 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 18:19:27,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:28,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 18:19:28,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 1803. [2021-06-05 18:19:28,031 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) [2021-06-05 18:19:28,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 4918 transitions. [2021-06-05 18:19:28,033 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 4918 transitions. Word has length 70 [2021-06-05 18:19:28,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:28,033 INFO L482 AbstractCegarLoop]: Abstraction has 1803 states and 4918 transitions. [2021-06-05 18:19:28,033 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) [2021-06-05 18:19:28,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 4918 transitions. [2021-06-05 18:19:28,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:28,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:28,035 INFO L554 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] [2021-06-05 18:19:28,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:19:28,235 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-05 18:19:28,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:28,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505076869] [2021-06-05 18:19:28,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505076869] [2021-06-05 18:19:28,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505076869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243800257] [2021-06-05 18:19:28,344 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 [2021-06-05 18:19:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:28,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:28,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243800257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:19:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148604826] [2021-06-05 18:19:28,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:28,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:28,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:28,532 INFO L87 Difference]: Start difference. First operand 1803 states and 4918 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:28,728 INFO L93 Difference]: Finished difference Result 2621 states and 6757 transitions. [2021-06-05 18:19:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:28,729 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 [2021-06-05 18:19:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:28,731 INFO L225 Difference]: With dead ends: 2621 [2021-06-05 18:19:28,731 INFO L226 Difference]: Without dead ends: 2351 [2021-06-05 18:19:28,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-05 18:19:28,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1878. [2021-06-05 18:19:28,754 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) [2021-06-05 18:19:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 5143 transitions. [2021-06-05 18:19:28,757 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 5143 transitions. Word has length 75 [2021-06-05 18:19:28,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:28,757 INFO L482 AbstractCegarLoop]: Abstraction has 1878 states and 5143 transitions. [2021-06-05 18:19:28,757 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) [2021-06-05 18:19:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 5143 transitions. [2021-06-05 18:19:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:28,759 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:28,759 INFO L554 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] [2021-06-05 18:19:28,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:28,983 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:28,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:28,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-05 18:19:28,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:28,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845310335] [2021-06-05 18:19:28,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:29,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845310335] [2021-06-05 18:19:29,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845310335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702922991] [2021-06-05 18:19:29,100 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 [2021-06-05 18:19:29,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:19:29,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:29,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702922991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:19:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544097534] [2021-06-05 18:19:29,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:29,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:29,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:29,287 INFO L87 Difference]: Start difference. First operand 1878 states and 5143 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:29,537 INFO L93 Difference]: Finished difference Result 2841 states and 7272 transitions. [2021-06-05 18:19:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:19:29,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:19:29,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:29,540 INFO L225 Difference]: With dead ends: 2841 [2021-06-05 18:19:29,540 INFO L226 Difference]: Without dead ends: 2571 [2021-06-05 18:19:29,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 261.2ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:19:29,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-06-05 18:19:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1953. [2021-06-05 18:19:29,559 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) [2021-06-05 18:19:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5368 transitions. [2021-06-05 18:19:29,561 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5368 transitions. Word has length 75 [2021-06-05 18:19:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:29,561 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5368 transitions. [2021-06-05 18:19:29,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5368 transitions. [2021-06-05 18:19:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:29,563 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:29,563 INFO L554 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] [2021-06-05 18:19:29,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 18:19:29,764 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:29,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-05 18:19:29,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:29,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065115428] [2021-06-05 18:19:29,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:29,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065115428] [2021-06-05 18:19:29,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065115428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410393603] [2021-06-05 18:19:29,859 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 [2021-06-05 18:19:29,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:29,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410393603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:30,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:19:30,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438849908] [2021-06-05 18:19:30,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:30,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:30,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:30,016 INFO L87 Difference]: Start difference. First operand 1953 states and 5368 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:30,270 INFO L93 Difference]: Finished difference Result 2871 states and 7407 transitions. [2021-06-05 18:19:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:30,271 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 [2021-06-05 18:19:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:30,273 INFO L225 Difference]: With dead ends: 2871 [2021-06-05 18:19:30,273 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 18:19:30,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:19:30,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 18:19:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2028. [2021-06-05 18:19:30,300 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) [2021-06-05 18:19:30,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5593 transitions. [2021-06-05 18:19:30,304 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5593 transitions. Word has length 75 [2021-06-05 18:19:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:30,304 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5593 transitions. [2021-06-05 18:19:30,304 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) [2021-06-05 18:19:30,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5593 transitions. [2021-06-05 18:19:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:30,307 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:30,307 INFO L554 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] [2021-06-05 18:19:30,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 18:19:30,521 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:30,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:30,521 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-05 18:19:30,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:30,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303325096] [2021-06-05 18:19:30,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303325096] [2021-06-05 18:19:30,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303325096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218783465] [2021-06-05 18:19:30,625 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 [2021-06-05 18:19:30,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:19:30,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:30,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:30,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218783465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:30,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:19:30,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401862336] [2021-06-05 18:19:30,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:30,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:30,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:30,829 INFO L87 Difference]: Start difference. First operand 2028 states and 5593 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:31,126 INFO L93 Difference]: Finished difference Result 2896 states and 7532 transitions. [2021-06-05 18:19:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:31,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:19:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:31,129 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 18:19:31,129 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 18:19:31,129 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:19:31,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 18:19:31,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2103. [2021-06-05 18:19:31,147 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) [2021-06-05 18:19:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5818 transitions. [2021-06-05 18:19:31,150 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5818 transitions. Word has length 75 [2021-06-05 18:19:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:31,150 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5818 transitions. [2021-06-05 18:19:31,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5818 transitions. [2021-06-05 18:19:31,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:31,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,152 INFO L554 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] [2021-06-05 18:19:31,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:31,352 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:31,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:31,353 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-05 18:19:31,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:31,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575950550] [2021-06-05 18:19:31,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:31,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:31,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575950550] [2021-06-05 18:19:31,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575950550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446399818] [2021-06-05 18:19:31,445 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 [2021-06-05 18:19:31,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:19:31,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:31,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:31,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446399818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:31,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:19:31,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926203368] [2021-06-05 18:19:31,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:31,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:31,619 INFO L87 Difference]: Start difference. First operand 2103 states and 5818 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:31,882 INFO L93 Difference]: Finished difference Result 2966 states and 7777 transitions. [2021-06-05 18:19:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:31,882 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 [2021-06-05 18:19:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:31,885 INFO L225 Difference]: With dead ends: 2966 [2021-06-05 18:19:31,885 INFO L226 Difference]: Without dead ends: 2696 [2021-06-05 18:19:31,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:19:31,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-06-05 18:19:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2178. [2021-06-05 18:19:31,907 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) [2021-06-05 18:19:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 6058 transitions. [2021-06-05 18:19:31,909 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 6058 transitions. Word has length 75 [2021-06-05 18:19:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:31,909 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 6058 transitions. [2021-06-05 18:19:31,909 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) [2021-06-05 18:19:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 6058 transitions. [2021-06-05 18:19:31,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:31,911 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,911 INFO L554 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] [2021-06-05 18:19:32,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:19:32,112 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:32,112 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-05 18:19:32,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:32,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781909755] [2021-06-05 18:19:32,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:32,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781909755] [2021-06-05 18:19:32,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781909755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825614361] [2021-06-05 18:19:32,215 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 [2021-06-05 18:19:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:32,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825614361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:32,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:19:32,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703870503] [2021-06-05 18:19:32,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:32,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:32,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:32,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:32,466 INFO L87 Difference]: Start difference. First operand 2178 states and 6058 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:32,858 INFO L93 Difference]: Finished difference Result 3544 states and 9403 transitions. [2021-06-05 18:19:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:32,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:19:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:32,862 INFO L225 Difference]: With dead ends: 3544 [2021-06-05 18:19:32,862 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:19:32,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:19:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2253. [2021-06-05 18:19:32,881 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) [2021-06-05 18:19:32,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 18:19:32,885 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 18:19:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:32,885 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 18:19:32,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 18:19:32,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:32,888 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:32,888 INFO L554 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] [2021-06-05 18:19:33,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:33,112 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:33,113 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-05 18:19:33,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:33,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037851509] [2021-06-05 18:19:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:33,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037851509] [2021-06-05 18:19:33,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037851509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392130249] [2021-06-05 18:19:33,194 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 [2021-06-05 18:19:33,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:33,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:33,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:33,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:33,345 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392130249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:33,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:19:33,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266173555] [2021-06-05 18:19:33,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:19:33,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:33,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:19:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:19:33,346 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:33,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:33,669 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 18:19:33,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:19:33,670 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 [2021-06-05 18:19:33,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,673 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 18:19:33,673 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 18:19:33,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=355, Invalid=905, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:19:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 18:19:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 18:19:33,699 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) [2021-06-05 18:19:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 18:19:33,703 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 18:19:33,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:33,703 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 18:19:33,703 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) [2021-06-05 18:19:33,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 18:19:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:19:33,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:33,705 INFO L554 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] [2021-06-05 18:19:33,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:19:33,906 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-05 18:19:33,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:33,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288446111] [2021-06-05 18:19:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288446111] [2021-06-05 18:19:34,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288446111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634945442] [2021-06-05 18:19:34,001 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 [2021-06-05 18:19:34,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:19:34,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:34,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:19:34,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634945442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:34,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:19:34,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824329162] [2021-06-05 18:19:34,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:34,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:34,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:34,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:34,214 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) [2021-06-05 18:19:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:34,700 INFO L93 Difference]: Finished difference Result 3616 states and 9736 transitions. [2021-06-05 18:19:34,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:34,701 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 [2021-06-05 18:19:34,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:34,704 INFO L225 Difference]: With dead ends: 3616 [2021-06-05 18:19:34,704 INFO L226 Difference]: Without dead ends: 3041 [2021-06-05 18:19:34,705 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:34,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2021-06-05 18:19:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 1724. [2021-06-05 18:19:34,726 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) [2021-06-05 18:19:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 4706 transitions. [2021-06-05 18:19:34,729 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 4706 transitions. Word has length 75 [2021-06-05 18:19:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:34,729 INFO L482 AbstractCegarLoop]: Abstraction has 1724 states and 4706 transitions. [2021-06-05 18:19:34,729 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) [2021-06-05 18:19:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 4706 transitions. [2021-06-05 18:19:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:34,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:34,731 INFO L554 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] [2021-06-05 18:19:34,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:34,932 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:34,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:34,932 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-05 18:19:34,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:34,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744722994] [2021-06-05 18:19:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744722994] [2021-06-05 18:19:35,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744722994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645062710] [2021-06-05 18:19:35,065 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 [2021-06-05 18:19:35,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:35,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645062710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:35,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 18:19:35,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355241890] [2021-06-05 18:19:35,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:19:35,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:19:35,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:19:35,276 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) [2021-06-05 18:19:35,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:35,543 INFO L93 Difference]: Finished difference Result 2614 states and 6806 transitions. [2021-06-05 18:19:35,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:19:35,543 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 [2021-06-05 18:19:35,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:35,545 INFO L225 Difference]: With dead ends: 2614 [2021-06-05 18:19:35,545 INFO L226 Difference]: Without dead ends: 2280 [2021-06-05 18:19:35,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:35,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2021-06-05 18:19:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 1809. [2021-06-05 18:19:35,565 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) [2021-06-05 18:19:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1809 states to 1809 states and 4876 transitions. [2021-06-05 18:19:35,567 INFO L78 Accepts]: Start accepts. Automaton has 1809 states and 4876 transitions. Word has length 80 [2021-06-05 18:19:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:35,568 INFO L482 AbstractCegarLoop]: Abstraction has 1809 states and 4876 transitions. [2021-06-05 18:19:35,568 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) [2021-06-05 18:19:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1809 states and 4876 transitions. [2021-06-05 18:19:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:35,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:35,569 INFO L554 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] [2021-06-05 18:19:35,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:19:35,770 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:35,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-05 18:19:35,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:35,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467370315] [2021-06-05 18:19:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:35,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:35,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467370315] [2021-06-05 18:19:35,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467370315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440128852] [2021-06-05 18:19:35,894 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 [2021-06-05 18:19:35,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:19:35,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:35,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:36,093 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440128852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:36,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:19:36,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700549101] [2021-06-05 18:19:36,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:36,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:36,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:36,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:36,094 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) [2021-06-05 18:19:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:36,303 INFO L93 Difference]: Finished difference Result 3036 states and 7587 transitions. [2021-06-05 18:19:36,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:19:36,304 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 [2021-06-05 18:19:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:36,307 INFO L225 Difference]: With dead ends: 3036 [2021-06-05 18:19:36,307 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 18:19:36,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:19:36,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 18:19:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 1953. [2021-06-05 18:19:36,333 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) [2021-06-05 18:19:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 5293 transitions. [2021-06-05 18:19:36,336 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 5293 transitions. Word has length 80 [2021-06-05 18:19:36,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:36,336 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 5293 transitions. [2021-06-05 18:19:36,337 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) [2021-06-05 18:19:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 5293 transitions. [2021-06-05 18:19:36,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:36,342 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:36,342 INFO L554 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] [2021-06-05 18:19:36,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:19:36,557 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-05 18:19:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:36,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458410404] [2021-06-05 18:19:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458410404] [2021-06-05 18:19:36,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458410404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226507763] [2021-06-05 18:19:36,695 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 [2021-06-05 18:19:36,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:19:36,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:36,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:36,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226507763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:36,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:19:36,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341799968] [2021-06-05 18:19:36,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:36,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:36,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:36,924 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) [2021-06-05 18:19:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:37,252 INFO L93 Difference]: Finished difference Result 2996 states and 7582 transitions. [2021-06-05 18:19:37,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:19:37,253 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 [2021-06-05 18:19:37,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:37,255 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 18:19:37,256 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 18:19:37,256 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 351.4ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:19:37,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 18:19:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2028. [2021-06-05 18:19:37,280 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) [2021-06-05 18:19:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5518 transitions. [2021-06-05 18:19:37,283 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5518 transitions. Word has length 80 [2021-06-05 18:19:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:37,283 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5518 transitions. [2021-06-05 18:19:37,283 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) [2021-06-05 18:19:37,283 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5518 transitions. [2021-06-05 18:19:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:37,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:37,286 INFO L554 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] [2021-06-05 18:19:37,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:37,486 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:37,487 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-05 18:19:37,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:37,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658819654] [2021-06-05 18:19:37,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:37,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:37,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658819654] [2021-06-05 18:19:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658819654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193714684] [2021-06-05 18:19:37,600 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 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 [2021-06-05 18:19:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:37,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:37,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193714684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:37,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:19:37,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002407682] [2021-06-05 18:19:37,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:37,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:37,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:37,796 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) [2021-06-05 18:19:38,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:38,069 INFO L93 Difference]: Finished difference Result 3046 states and 7757 transitions. [2021-06-05 18:19:38,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:19:38,069 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 [2021-06-05 18:19:38,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:38,072 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 18:19:38,072 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 18:19:38,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:19:38,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 18:19:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2103. [2021-06-05 18:19:38,091 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) [2021-06-05 18:19:38,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5743 transitions. [2021-06-05 18:19:38,093 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5743 transitions. Word has length 80 [2021-06-05 18:19:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:38,094 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5743 transitions. [2021-06-05 18:19:38,094 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) [2021-06-05 18:19:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5743 transitions. [2021-06-05 18:19:38,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:38,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:38,095 INFO L554 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] [2021-06-05 18:19:38,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 18:19:38,296 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:38,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:38,296 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-05 18:19:38,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:38,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933635110] [2021-06-05 18:19:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:38,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:38,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933635110] [2021-06-05 18:19:38,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933635110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005908268] [2021-06-05 18:19:38,423 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 [2021-06-05 18:19:38,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:38,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005908268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:38,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:19:38,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121529499] [2021-06-05 18:19:38,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:38,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:38,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:38,645 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) [2021-06-05 18:19:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:39,000 INFO L93 Difference]: Finished difference Result 3071 states and 7882 transitions. [2021-06-05 18:19:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:39,000 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 [2021-06-05 18:19:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:39,003 INFO L225 Difference]: With dead ends: 3071 [2021-06-05 18:19:39,003 INFO L226 Difference]: Without dead ends: 2801 [2021-06-05 18:19:39,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 347.3ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2801 states. [2021-06-05 18:19:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2801 to 2178. [2021-06-05 18:19:39,026 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) [2021-06-05 18:19:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 5968 transitions. [2021-06-05 18:19:39,028 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 5968 transitions. Word has length 80 [2021-06-05 18:19:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:39,028 INFO L482 AbstractCegarLoop]: Abstraction has 2178 states and 5968 transitions. [2021-06-05 18:19:39,029 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) [2021-06-05 18:19:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 5968 transitions. [2021-06-05 18:19:39,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:39,030 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:39,030 INFO L554 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] [2021-06-05 18:19:39,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:39,232 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:39,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:39,232 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-05 18:19:39,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:39,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878092960] [2021-06-05 18:19:39,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:39,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878092960] [2021-06-05 18:19:39,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878092960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:39,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658390677] [2021-06-05 18:19:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:39,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:19:39,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:39,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:39,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:39,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658390677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:39,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:39,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:19:39,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76816855] [2021-06-05 18:19:39,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:39,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:39,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:39,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:39,561 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) [2021-06-05 18:19:39,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:39,824 INFO L93 Difference]: Finished difference Result 3096 states and 8007 transitions. [2021-06-05 18:19:39,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:39,825 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 [2021-06-05 18:19:39,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:39,827 INFO L225 Difference]: With dead ends: 3096 [2021-06-05 18:19:39,827 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 18:19:39,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:19:39,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 18:19:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-05 18:19:39,858 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) [2021-06-05 18:19:39,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6193 transitions. [2021-06-05 18:19:39,860 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6193 transitions. Word has length 80 [2021-06-05 18:19:39,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:39,860 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6193 transitions. [2021-06-05 18:19:39,860 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) [2021-06-05 18:19:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6193 transitions. [2021-06-05 18:19:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:39,862 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:39,862 INFO L554 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] [2021-06-05 18:19:40,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:40,063 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:40,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:40,063 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-05 18:19:40,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:40,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064308907] [2021-06-05 18:19:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:40,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:40,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:40,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064308907] [2021-06-05 18:19:40,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064308907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:40,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811820693] [2021-06-05 18:19:40,179 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 [2021-06-05 18:19:40,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:40,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:40,368 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:40,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811820693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:40,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:40,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:19:40,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601811577] [2021-06-05 18:19:40,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:40,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:40,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:40,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:40,369 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) [2021-06-05 18:19:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:40,735 INFO L93 Difference]: Finished difference Result 3121 states and 8132 transitions. [2021-06-05 18:19:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:40,736 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 [2021-06-05 18:19:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:40,738 INFO L225 Difference]: With dead ends: 3121 [2021-06-05 18:19:40,738 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 18:19:40,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:19:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 18:19:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2328. [2021-06-05 18:19:40,758 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) [2021-06-05 18:19:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 6418 transitions. [2021-06-05 18:19:40,761 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 6418 transitions. Word has length 80 [2021-06-05 18:19:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:40,761 INFO L482 AbstractCegarLoop]: Abstraction has 2328 states and 6418 transitions. [2021-06-05 18:19:40,761 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) [2021-06-05 18:19:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 6418 transitions. [2021-06-05 18:19:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:40,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:40,763 INFO L554 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] [2021-06-05 18:19:40,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:19:40,963 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:40,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:40,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-05 18:19:40,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:40,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243856564] [2021-06-05 18:19:40,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:41,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243856564] [2021-06-05 18:19:41,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243856564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862853344] [2021-06-05 18:19:41,091 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 [2021-06-05 18:19:41,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:19:41,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:41,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:41,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862853344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:41,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:19:41,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72968512] [2021-06-05 18:19:41,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:41,271 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) [2021-06-05 18:19:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:41,561 INFO L93 Difference]: Finished difference Result 3191 states and 8377 transitions. [2021-06-05 18:19:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:41,562 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 [2021-06-05 18:19:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:41,565 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 18:19:41,565 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:19:41,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:19:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:19:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2403. [2021-06-05 18:19:41,590 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) [2021-06-05 18:19:41,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2403 states to 2403 states and 6658 transitions. [2021-06-05 18:19:41,593 INFO L78 Accepts]: Start accepts. Automaton has 2403 states and 6658 transitions. Word has length 80 [2021-06-05 18:19:41,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:41,593 INFO L482 AbstractCegarLoop]: Abstraction has 2403 states and 6658 transitions. [2021-06-05 18:19:41,593 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) [2021-06-05 18:19:41,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2403 states and 6658 transitions. [2021-06-05 18:19:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:41,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:41,595 INFO L554 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] [2021-06-05 18:19:41,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:41,796 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-05 18:19:41,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:41,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855034310] [2021-06-05 18:19:41,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855034310] [2021-06-05 18:19:41,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855034310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446150598] [2021-06-05 18:19:41,905 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 [2021-06-05 18:19:41,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:19:41,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:41,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446150598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:42,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:19:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036719254] [2021-06-05 18:19:42,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:42,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:42,096 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) [2021-06-05 18:19:42,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:42,545 INFO L93 Difference]: Finished difference Result 3769 states and 10003 transitions. [2021-06-05 18:19:42,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:42,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:19:42,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:42,549 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 18:19:42,549 INFO L226 Difference]: Without dead ends: 3146 [2021-06-05 18:19:42,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:42,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-06-05 18:19:42,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2478. [2021-06-05 18:19:42,570 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) [2021-06-05 18:19:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6888 transitions. [2021-06-05 18:19:42,573 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6888 transitions. Word has length 80 [2021-06-05 18:19:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:42,573 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6888 transitions. [2021-06-05 18:19:42,573 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) [2021-06-05 18:19:42,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6888 transitions. [2021-06-05 18:19:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:42,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:42,575 INFO L554 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] [2021-06-05 18:19:42,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:19:42,776 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:42,776 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-05 18:19:42,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:42,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682701017] [2021-06-05 18:19:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682701017] [2021-06-05 18:19:42,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682701017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466159464] [2021-06-05 18:19:42,868 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 [2021-06-05 18:19:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466159464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:43,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:19:43,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783448478] [2021-06-05 18:19:43,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:19:43,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:43,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:19:43,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:19:43,036 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) [2021-06-05 18:19:43,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:43,371 INFO L93 Difference]: Finished difference Result 3998 states and 10721 transitions. [2021-06-05 18:19:43,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:19:43,371 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 [2021-06-05 18:19:43,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:43,376 INFO L225 Difference]: With dead ends: 3998 [2021-06-05 18:19:43,376 INFO L226 Difference]: Without dead ends: 3728 [2021-06-05 18:19:43,376 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 285.6ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:19:43,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-05 18:19:43,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2658. [2021-06-05 18:19:43,411 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) [2021-06-05 18:19:43,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2658 states to 2658 states and 7447 transitions. [2021-06-05 18:19:43,416 INFO L78 Accepts]: Start accepts. Automaton has 2658 states and 7447 transitions. Word has length 80 [2021-06-05 18:19:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:43,417 INFO L482 AbstractCegarLoop]: Abstraction has 2658 states and 7447 transitions. [2021-06-05 18:19:43,417 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) [2021-06-05 18:19:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2658 states and 7447 transitions. [2021-06-05 18:19:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:19:43,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:43,419 INFO L554 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] [2021-06-05 18:19:43,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:19:43,640 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:43,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:43,641 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-05 18:19:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:43,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536941473] [2021-06-05 18:19:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536941473] [2021-06-05 18:19:43,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536941473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699353916] [2021-06-05 18:19:43,751 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 [2021-06-05 18:19:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:19:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699353916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:43,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:19:43,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897989919] [2021-06-05 18:19:43,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:43,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:43,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:43,965 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) [2021-06-05 18:19:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:44,513 INFO L93 Difference]: Finished difference Result 3821 states and 10221 transitions. [2021-06-05 18:19:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:44,513 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 [2021-06-05 18:19:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:44,521 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:19:44,521 INFO L226 Difference]: Without dead ends: 3246 [2021-06-05 18:19:44,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 506.1ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-06-05 18:19:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 2003. [2021-06-05 18:19:44,548 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) [2021-06-05 18:19:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 5468 transitions. [2021-06-05 18:19:44,552 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 5468 transitions. Word has length 80 [2021-06-05 18:19:44,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:44,552 INFO L482 AbstractCegarLoop]: Abstraction has 2003 states and 5468 transitions. [2021-06-05 18:19:44,552 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) [2021-06-05 18:19:44,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 5468 transitions. [2021-06-05 18:19:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:44,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:44,555 INFO L554 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] [2021-06-05 18:19:44,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:19:44,772 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:44,772 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-05 18:19:44,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:44,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977410784] [2021-06-05 18:19:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:44,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977410784] [2021-06-05 18:19:44,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977410784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:44,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713029165] [2021-06-05 18:19:44,907 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 [2021-06-05 18:19:44,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:19:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:44,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:45,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:45,138 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713029165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:45,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:19:45,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951484728] [2021-06-05 18:19:45,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:45,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:45,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:45,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:45,139 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) [2021-06-05 18:19:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:45,393 INFO L93 Difference]: Finished difference Result 2921 states and 7507 transitions. [2021-06-05 18:19:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:19:45,394 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 [2021-06-05 18:19:45,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:45,396 INFO L225 Difference]: With dead ends: 2921 [2021-06-05 18:19:45,396 INFO L226 Difference]: Without dead ends: 2651 [2021-06-05 18:19:45,397 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:19:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2021-06-05 18:19:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2078. [2021-06-05 18:19:45,415 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) [2021-06-05 18:19:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 5693 transitions. [2021-06-05 18:19:45,417 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 5693 transitions. Word has length 85 [2021-06-05 18:19:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:45,417 INFO L482 AbstractCegarLoop]: Abstraction has 2078 states and 5693 transitions. [2021-06-05 18:19:45,417 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) [2021-06-05 18:19:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 5693 transitions. [2021-06-05 18:19:45,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:45,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:45,419 INFO L554 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] [2021-06-05 18:19:45,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:19:45,620 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:45,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-05 18:19:45,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:45,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447011173] [2021-06-05 18:19:45,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:45,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447011173] [2021-06-05 18:19:45,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447011173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005916290] [2021-06-05 18:19:45,762 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 [2021-06-05 18:19:45,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:45,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005916290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:45,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:19:45,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288398803] [2021-06-05 18:19:45,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:45,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:45,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:45,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:45,981 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) [2021-06-05 18:19:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:46,289 INFO L93 Difference]: Finished difference Result 3191 states and 8122 transitions. [2021-06-05 18:19:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:46,290 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 [2021-06-05 18:19:46,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:46,293 INFO L225 Difference]: With dead ends: 3191 [2021-06-05 18:19:46,293 INFO L226 Difference]: Without dead ends: 2921 [2021-06-05 18:19:46,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 319.4ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:19:46,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2021-06-05 18:19:46,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2153. [2021-06-05 18:19:46,312 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) [2021-06-05 18:19:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5918 transitions. [2021-06-05 18:19:46,314 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5918 transitions. Word has length 85 [2021-06-05 18:19:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:46,314 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5918 transitions. [2021-06-05 18:19:46,315 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) [2021-06-05 18:19:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5918 transitions. [2021-06-05 18:19:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:46,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:46,316 INFO L554 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] [2021-06-05 18:19:46,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:46,517 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:46,517 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-05 18:19:46,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:46,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104151117] [2021-06-05 18:19:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:46,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104151117] [2021-06-05 18:19:46,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104151117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715751538] [2021-06-05 18:19:46,632 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 [2021-06-05 18:19:46,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:19:46,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:46,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:46,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:46,819 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:46,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715751538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:46,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:19:46,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013114589] [2021-06-05 18:19:46,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:46,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:46,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:46,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:46,820 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) [2021-06-05 18:19:47,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:47,096 INFO L93 Difference]: Finished difference Result 3221 states and 8257 transitions. [2021-06-05 18:19:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:47,097 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 [2021-06-05 18:19:47,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:47,099 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:19:47,100 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 18:19:47,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 282.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:19:47,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 18:19:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2228. [2021-06-05 18:19:47,124 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) [2021-06-05 18:19:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6143 transitions. [2021-06-05 18:19:47,128 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6143 transitions. Word has length 85 [2021-06-05 18:19:47,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:47,128 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6143 transitions. [2021-06-05 18:19:47,128 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) [2021-06-05 18:19:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6143 transitions. [2021-06-05 18:19:47,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:47,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:47,131 INFO L554 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] [2021-06-05 18:19:47,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:47,335 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-05 18:19:47,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:47,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587760115] [2021-06-05 18:19:47,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:47,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587760115] [2021-06-05 18:19:47,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587760115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716432675] [2021-06-05 18:19:47,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:47,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:19:47,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:47,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716432675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:47,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:19:47,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622716647] [2021-06-05 18:19:47,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:47,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:47,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:47,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:47,726 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) [2021-06-05 18:19:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:48,098 INFO L93 Difference]: Finished difference Result 3246 states and 8382 transitions. [2021-06-05 18:19:48,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:48,099 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 [2021-06-05 18:19:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:48,101 INFO L225 Difference]: With dead ends: 3246 [2021-06-05 18:19:48,102 INFO L226 Difference]: Without dead ends: 2976 [2021-06-05 18:19:48,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2021-06-05 18:19:48,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 2303. [2021-06-05 18:19:48,125 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) [2021-06-05 18:19:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6368 transitions. [2021-06-05 18:19:48,128 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6368 transitions. Word has length 85 [2021-06-05 18:19:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:48,128 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6368 transitions. [2021-06-05 18:19:48,128 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) [2021-06-05 18:19:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6368 transitions. [2021-06-05 18:19:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:48,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:48,130 INFO L554 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] [2021-06-05 18:19:48,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:48,331 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:48,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-05 18:19:48,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:48,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587148275] [2021-06-05 18:19:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:48,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587148275] [2021-06-05 18:19:48,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587148275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043260449] [2021-06-05 18:19:48,453 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 [2021-06-05 18:19:48,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043260449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:48,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:19:48,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069831958] [2021-06-05 18:19:48,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:48,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:48,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:48,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:48,627 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) [2021-06-05 18:19:48,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:48,932 INFO L93 Difference]: Finished difference Result 3271 states and 8507 transitions. [2021-06-05 18:19:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:19:48,933 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 [2021-06-05 18:19:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:48,936 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 18:19:48,936 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 18:19:48,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 18:19:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2378. [2021-06-05 18:19:48,964 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) [2021-06-05 18:19:48,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6593 transitions. [2021-06-05 18:19:48,968 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6593 transitions. Word has length 85 [2021-06-05 18:19:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:48,968 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6593 transitions. [2021-06-05 18:19:48,968 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) [2021-06-05 18:19:48,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6593 transitions. [2021-06-05 18:19:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:48,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:48,971 INFO L554 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] [2021-06-05 18:19:49,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:19:49,197 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:49,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:49,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-05 18:19:49,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:49,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124462713] [2021-06-05 18:19:49,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:49,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124462713] [2021-06-05 18:19:49,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124462713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653004660] [2021-06-05 18:19:49,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:49,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:49,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:49,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:49,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653004660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:49,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:19:49,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334248604] [2021-06-05 18:19:49,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:49,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:49,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:49,522 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) [2021-06-05 18:19:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:49,924 INFO L93 Difference]: Finished difference Result 3296 states and 8632 transitions. [2021-06-05 18:19:49,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:49,924 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 [2021-06-05 18:19:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:49,926 INFO L225 Difference]: With dead ends: 3296 [2021-06-05 18:19:49,926 INFO L226 Difference]: Without dead ends: 3026 [2021-06-05 18:19:49,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2021-06-05 18:19:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2453. [2021-06-05 18:19:49,948 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) [2021-06-05 18:19:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6818 transitions. [2021-06-05 18:19:49,951 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6818 transitions. Word has length 85 [2021-06-05 18:19:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:49,951 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6818 transitions. [2021-06-05 18:19:49,951 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) [2021-06-05 18:19:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6818 transitions. [2021-06-05 18:19:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:49,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:49,953 INFO L554 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] [2021-06-05 18:19:50,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:50,154 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:50,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-05 18:19:50,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:50,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983569909] [2021-06-05 18:19:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:50,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:50,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983569909] [2021-06-05 18:19:50,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983569909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:50,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704626701] [2021-06-05 18:19:50,266 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 [2021-06-05 18:19:50,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:19:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:50,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704626701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:50,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:50,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:19:50,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110773680] [2021-06-05 18:19:50,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:50,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:50,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:50,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:50,446 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) [2021-06-05 18:19:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:50,773 INFO L93 Difference]: Finished difference Result 3366 states and 8877 transitions. [2021-06-05 18:19:50,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:50,774 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 [2021-06-05 18:19:50,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:50,777 INFO L225 Difference]: With dead ends: 3366 [2021-06-05 18:19:50,777 INFO L226 Difference]: Without dead ends: 3096 [2021-06-05 18:19:50,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:19:50,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-06-05 18:19:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2528. [2021-06-05 18:19:50,804 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) [2021-06-05 18:19:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 7058 transitions. [2021-06-05 18:19:50,808 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 7058 transitions. Word has length 85 [2021-06-05 18:19:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:50,809 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 7058 transitions. [2021-06-05 18:19:50,809 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) [2021-06-05 18:19:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 7058 transitions. [2021-06-05 18:19:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:50,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:50,811 INFO L554 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] [2021-06-05 18:19:51,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:19:51,011 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-05 18:19:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:51,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876993016] [2021-06-05 18:19:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:51,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:51,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876993016] [2021-06-05 18:19:51,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876993016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066646058] [2021-06-05 18:19:51,119 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 [2021-06-05 18:19:51,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:51,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:51,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:51,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066646058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:51,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:19:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318958978] [2021-06-05 18:19:51,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:51,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:51,314 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) [2021-06-05 18:19:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:51,889 INFO L93 Difference]: Finished difference Result 3944 states and 10503 transitions. [2021-06-05 18:19:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:51,890 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 [2021-06-05 18:19:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:51,893 INFO L225 Difference]: With dead ends: 3944 [2021-06-05 18:19:51,893 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:19:51,894 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 511.7ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:51,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:19:51,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2603. [2021-06-05 18:19:51,919 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) [2021-06-05 18:19:51,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 18:19:51,923 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 18:19:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:51,923 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 18:19:51,923 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) [2021-06-05 18:19:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 18:19:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:51,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:51,925 INFO L554 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] [2021-06-05 18:19:52,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:52,125 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-05 18:19:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715878680] [2021-06-05 18:19:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715878680] [2021-06-05 18:19:52,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715878680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540497042] [2021-06-05 18:19:52,238 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 [2021-06-05 18:19:52,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:19:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:52,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540497042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:52,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:19:52,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020319730] [2021-06-05 18:19:52,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:52,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:52,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:52,423 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) [2021-06-05 18:19:52,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:52,808 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 18:19:52,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:52,809 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 [2021-06-05 18:19:52,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:52,813 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 18:19:52,813 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 18:19:52,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:19:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 18:19:52,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 18:19:52,838 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) [2021-06-05 18:19:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 18:19:52,841 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 18:19:52,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:52,842 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 18:19:52,842 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) [2021-06-05 18:19:52,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 18:19:52,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:19:52,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:52,843 INFO L554 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] [2021-06-05 18:19:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:19:53,044 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-05 18:19:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:53,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855582886] [2021-06-05 18:19:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:53,146 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:53,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855582886] [2021-06-05 18:19:53,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855582886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940198789] [2021-06-05 18:19:53,146 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 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 [2021-06-05 18:19:53,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:19:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:19:53,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940198789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:53,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:19:53,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268847809] [2021-06-05 18:19:53,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:53,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:53,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:53,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:53,351 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) [2021-06-05 18:19:53,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:53,891 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 18:19:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:53,892 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 [2021-06-05 18:19:53,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:53,895 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 18:19:53,895 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 18:19:53,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 18:19:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 18:19:53,916 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) [2021-06-05 18:19:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 18:19:53,918 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 18:19:53,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:53,918 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 18:19:53,918 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) [2021-06-05 18:19:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 18:19:53,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:53,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:53,920 INFO L554 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] [2021-06-05 18:19:54,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,124 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:54,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:54,124 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-05 18:19:54,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:54,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314015114] [2021-06-05 18:19:54,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314015114] [2021-06-05 18:19:54,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314015114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455761198] [2021-06-05 18:19:54,281 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 [2021-06-05 18:19:54,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:19:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455761198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:54,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:19:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315718180] [2021-06-05 18:19:54,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:54,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:54,521 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) [2021-06-05 18:19:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:54,827 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 18:19:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:54,828 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 [2021-06-05 18:19:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:54,830 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 18:19:54,830 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 18:19:54,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 18:19:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 18:19:54,856 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) [2021-06-05 18:19:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 18:19:54,858 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 18:19:54,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:54,858 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 18:19:54,858 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) [2021-06-05 18:19:54,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 18:19:54,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:54,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:54,860 INFO L554 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] [2021-06-05 18:19:55,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 18:19:55,061 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-05 18:19:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:55,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191090479] [2021-06-05 18:19:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:55,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191090479] [2021-06-05 18:19:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191090479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909233953] [2021-06-05 18:19:55,193 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 [2021-06-05 18:19:55,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:55,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:55,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909233953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:55,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:19:55,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697361199] [2021-06-05 18:19:55,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:55,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:55,395 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) [2021-06-05 18:19:55,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:55,618 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 18:19:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:19:55,618 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 [2021-06-05 18:19:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:55,621 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 18:19:55,621 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 18:19:55,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:19:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 18:19:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 18:19:55,640 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) [2021-06-05 18:19:55,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 18:19:55,642 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 18:19:55,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:55,642 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 18:19:55,642 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) [2021-06-05 18:19:55,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 18:19:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:55,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:55,644 INFO L554 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] [2021-06-05 18:19:55,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 18:19:55,844 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-05 18:19:55,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:55,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495457826] [2021-06-05 18:19:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:56,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495457826] [2021-06-05 18:19:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495457826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532767742] [2021-06-05 18:19:56,005 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 [2021-06-05 18:19:56,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:19:56,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:56,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:56,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532767742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:56,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:19:56,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078907628] [2021-06-05 18:19:56,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:56,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:56,224 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) [2021-06-05 18:19:56,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:56,542 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 18:19:56,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:56,542 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 [2021-06-05 18:19:56,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:56,546 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 18:19:56,546 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 18:19:56,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:19:56,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 18:19:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 18:19:56,567 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) [2021-06-05 18:19:56,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 18:19:56,569 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 18:19:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:56,569 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 18:19:56,569 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) [2021-06-05 18:19:56,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 18:19:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:56,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:56,571 INFO L554 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] [2021-06-05 18:19:56,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:56,785 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-05 18:19:56,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:56,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864124417] [2021-06-05 18:19:56,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:56,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:56,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864124417] [2021-06-05 18:19:56,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864124417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015136408] [2021-06-05 18:19:56,919 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 [2021-06-05 18:19:56,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:56,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015136408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:57,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:19:57,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120384714] [2021-06-05 18:19:57,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:57,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:57,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:57,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:57,102 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) [2021-06-05 18:19:57,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:57,384 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 18:19:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:19:57,384 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 [2021-06-05 18:19:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:57,387 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:19:57,387 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:19:57,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 296.2ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:19:57,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:19:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 18:19:57,410 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) [2021-06-05 18:19:57,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 18:19:57,413 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 18:19:57,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:57,413 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 18:19:57,413 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) [2021-06-05 18:19:57,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 18:19:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:57,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:57,415 INFO L554 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] [2021-06-05 18:19:57,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:57,618 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-05 18:19:57,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:57,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482320970] [2021-06-05 18:19:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482320970] [2021-06-05 18:19:57,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482320970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044038725] [2021-06-05 18:19:57,746 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 [2021-06-05 18:19:57,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:19:57,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:57,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:57,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044038725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:57,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:19:57,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403352015] [2021-06-05 18:19:57,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:57,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:57,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:57,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:57,927 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) [2021-06-05 18:19:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:58,274 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 18:19:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:58,274 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 [2021-06-05 18:19:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:58,277 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:19:58,278 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:19:58,278 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:19:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:19:58,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 18:19:58,302 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) [2021-06-05 18:19:58,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 18:19:58,306 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 18:19:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:58,306 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 18:19:58,306 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) [2021-06-05 18:19:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 18:19:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:58,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:58,308 INFO L554 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] [2021-06-05 18:19:58,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:19:58,513 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:58,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:58,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-05 18:19:58,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:58,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663101331] [2021-06-05 18:19:58,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:58,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663101331] [2021-06-05 18:19:58,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663101331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244505525] [2021-06-05 18:19:58,630 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 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 [2021-06-05 18:19:58,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:19:58,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:58,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:58,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:58,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244505525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:58,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:19:58,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940140675] [2021-06-05 18:19:58,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:19:58,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:19:58,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:19:58,799 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) [2021-06-05 18:19:59,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:59,088 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 18:19:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:19:59,089 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 [2021-06-05 18:19:59,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:59,092 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:19:59,092 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:19:59,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:19:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:19:59,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 18:19:59,115 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) [2021-06-05 18:19:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 18:19:59,118 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 18:19:59,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:59,118 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 18:19:59,118 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) [2021-06-05 18:19:59,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 18:19:59,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:19:59,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:59,120 INFO L554 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] [2021-06-05 18:19:59,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:59,321 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:59,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:59,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-05 18:19:59,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:59,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457505872] [2021-06-05 18:19:59,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:59,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:59,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457505872] [2021-06-05 18:19:59,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457505872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:59,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215427794] [2021-06-05 18:19:59,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:19:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:19:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:59,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215427794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:59,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:59,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:19:59,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696317266] [2021-06-05 18:19:59,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:19:59,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:19:59,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:19:59,647 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) [2021-06-05 18:20:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:00,061 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 18:20:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:00,062 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 [2021-06-05 18:20:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:00,065 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 18:20:00,065 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 18:20:00,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 411.8ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 18:20:00,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 18:20:00,090 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) [2021-06-05 18:20:00,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 18:20:00,093 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 18:20:00,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:00,093 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 18:20:00,093 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) [2021-06-05 18:20:00,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 18:20:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:00,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:00,096 INFO L554 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] [2021-06-05 18:20:00,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 18:20:00,320 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-05 18:20:00,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:00,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633092670] [2021-06-05 18:20:00,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:00,436 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:00,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633092670] [2021-06-05 18:20:00,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633092670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:00,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148059590] [2021-06-05 18:20:00,436 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 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 [2021-06-05 18:20:00,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:00,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:00,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:00,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148059590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:00,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:00,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:20:00,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245742137] [2021-06-05 18:20:00,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:20:00,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:00,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:20:00,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:20:00,600 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) [2021-06-05 18:20:00,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:00,918 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 18:20:00,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:00,918 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 [2021-06-05 18:20:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:00,921 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:20:00,921 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:20:00,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 307.0ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:20:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:20:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:20:00,942 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) [2021-06-05 18:20:00,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 18:20:00,945 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 18:20:00,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:00,945 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 18:20:00,945 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) [2021-06-05 18:20:00,945 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 18:20:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:00,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:00,947 INFO L554 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] [2021-06-05 18:20:01,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:01,149 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:01,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:01,149 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-05 18:20:01,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:01,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988619154] [2021-06-05 18:20:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:01,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988619154] [2021-06-05 18:20:01,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988619154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154098203] [2021-06-05 18:20:01,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:20:01,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:20:01,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:01,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154098203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:01,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:20:01,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619029701] [2021-06-05 18:20:01,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:01,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:01,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:01,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:01,473 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) [2021-06-05 18:20:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:01,934 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 18:20:01,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:01,935 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:20:01,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:01,938 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 18:20:01,938 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 18:20:01,939 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 416.0ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 18:20:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 18:20:01,979 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) [2021-06-05 18:20:01,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 18:20:01,983 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 18:20:01,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:01,983 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 18:20:01,983 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) [2021-06-05 18:20:01,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 18:20:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:01,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:01,985 INFO L554 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] [2021-06-05 18:20:02,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 18:20:02,188 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-05 18:20:02,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:02,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328338975] [2021-06-05 18:20:02,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:02,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:02,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328338975] [2021-06-05 18:20:02,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328338975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378664510] [2021-06-05 18:20:02,308 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 [2021-06-05 18:20:02,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:02,495 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:02,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378664510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:02,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:20:02,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937958050] [2021-06-05 18:20:02,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:20:02,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:20:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:20:02,496 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) [2021-06-05 18:20:02,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:02,869 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 18:20:02,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:02,869 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 [2021-06-05 18:20:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:02,873 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 18:20:02,873 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:20:02,873 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:02,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:20:02,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 18:20:02,902 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) [2021-06-05 18:20:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 18:20:02,905 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 18:20:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:02,905 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 18:20:02,905 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) [2021-06-05 18:20:02,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 18:20:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:02,907 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:02,908 INFO L554 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] [2021-06-05 18:20:03,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:03,108 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:03,108 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-05 18:20:03,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:03,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211050797] [2021-06-05 18:20:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:03,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:03,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211050797] [2021-06-05 18:20:03,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211050797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:03,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662582524] [2021-06-05 18:20:03,231 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 [2021-06-05 18:20:03,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:20:03,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:03,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662582524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:03,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:03,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:20:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636469526] [2021-06-05 18:20:03,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:03,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:03,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:03,431 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) [2021-06-05 18:20:03,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:03,997 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 18:20:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:03,998 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 [2021-06-05 18:20:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:04,003 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 18:20:04,003 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 18:20:04,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:04,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 18:20:04,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 18:20:04,028 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) [2021-06-05 18:20:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 18:20:04,031 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 18:20:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:04,031 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 18:20:04,031 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) [2021-06-05 18:20:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 18:20:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:04,034 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:04,034 INFO L554 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] [2021-06-05 18:20:04,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:20:04,234 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:04,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:04,235 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-05 18:20:04,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:04,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850730819] [2021-06-05 18:20:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:04,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850730819] [2021-06-05 18:20:04,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850730819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341502452] [2021-06-05 18:20:04,341 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 [2021-06-05 18:20:04,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:20:04,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:04,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:04,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341502452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:04,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:20:04,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744785309] [2021-06-05 18:20:04,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:20:04,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:04,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:20:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:20:04,567 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) [2021-06-05 18:20:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:04,998 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 18:20:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:04,998 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 [2021-06-05 18:20:04,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:05,003 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 18:20:05,003 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 18:20:05,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 376.7ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:05,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 18:20:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 18:20:05,031 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) [2021-06-05 18:20:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 18:20:05,035 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 18:20:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:05,035 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 18:20:05,035 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) [2021-06-05 18:20:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 18:20:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:20:05,037 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:05,037 INFO L554 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] [2021-06-05 18:20:05,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:05,237 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-05 18:20:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:05,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615256744] [2021-06-05 18:20:05,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:05,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:05,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615256744] [2021-06-05 18:20:05,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615256744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205444459] [2021-06-05 18:20:05,349 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 [2021-06-05 18:20:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:05,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:20:05,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:05,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205444459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:05,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:20:05,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615645240] [2021-06-05 18:20:05,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:05,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:05,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:05,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:05,562 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) [2021-06-05 18:20:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:06,142 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 18:20:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:06,142 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 [2021-06-05 18:20:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:06,146 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 18:20:06,146 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 18:20:06,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 530.3ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:06,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 18:20:06,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 18:20:06,165 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) [2021-06-05 18:20:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 18:20:06,167 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 18:20:06,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:06,168 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 18:20:06,168 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) [2021-06-05 18:20:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 18:20:06,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:06,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:06,169 INFO L554 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] [2021-06-05 18:20:06,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:06,370 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-05 18:20:06,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:06,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486554739] [2021-06-05 18:20:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:06,511 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:06,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486554739] [2021-06-05 18:20:06,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486554739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:06,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846701561] [2021-06-05 18:20:06,511 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 [2021-06-05 18:20:06,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:06,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:06,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:06,685 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:06,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846701561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:06,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:06,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:06,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518823941] [2021-06-05 18:20:06,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:06,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:06,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:06,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:06,686 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) [2021-06-05 18:20:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:06,999 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 18:20:06,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:20:06,999 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 [2021-06-05 18:20:06,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:07,002 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 18:20:07,002 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 18:20:07,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:20:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 18:20:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 18:20:07,021 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) [2021-06-05 18:20:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 18:20:07,024 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 18:20:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:07,024 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 18:20:07,024 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) [2021-06-05 18:20:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 18:20:07,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:07,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:07,025 INFO L554 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] [2021-06-05 18:20:07,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:07,226 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:07,226 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-05 18:20:07,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:07,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421497880] [2021-06-05 18:20:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:07,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:07,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421497880] [2021-06-05 18:20:07,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421497880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467791625] [2021-06-05 18:20:07,379 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 [2021-06-05 18:20:07,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:20:07,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:07,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:07,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:07,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467791625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:07,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:07,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003557692] [2021-06-05 18:20:07,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:07,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:07,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:07,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:07,579 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) [2021-06-05 18:20:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:07,906 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 18:20:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:07,906 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 [2021-06-05 18:20:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:07,909 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 18:20:07,909 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 18:20:07,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 18:20:07,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 18:20:07,933 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) [2021-06-05 18:20:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 18:20:07,935 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 18:20:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:07,935 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 18:20:07,935 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) [2021-06-05 18:20:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 18:20:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:07,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:07,937 INFO L554 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] [2021-06-05 18:20:08,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:08,138 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:08,138 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-05 18:20:08,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:08,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192565479] [2021-06-05 18:20:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192565479] [2021-06-05 18:20:08,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192565479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454603103] [2021-06-05 18:20:08,273 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 [2021-06-05 18:20:08,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:08,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:08,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:08,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454603103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:08,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:08,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529451412] [2021-06-05 18:20:08,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:08,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:08,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:08,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:08,454 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) [2021-06-05 18:20:08,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:08,778 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 18:20:08,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:08,778 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 [2021-06-05 18:20:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:08,781 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 18:20:08,782 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 18:20:08,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:20:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 18:20:08,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 18:20:08,808 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) [2021-06-05 18:20:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 18:20:08,812 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 18:20:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:08,812 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 18:20:08,812 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) [2021-06-05 18:20:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 18:20:08,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:08,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:08,814 INFO L554 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] [2021-06-05 18:20:09,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,015 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:09,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:09,015 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-05 18:20:09,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:09,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441968730] [2021-06-05 18:20:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441968730] [2021-06-05 18:20:09,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441968730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029443931] [2021-06-05 18:20:09,154 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 [2021-06-05 18:20:09,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:20:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029443931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:09,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:09,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103477209] [2021-06-05 18:20:09,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:09,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:09,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:09,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:09,383 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) [2021-06-05 18:20:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:09,763 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 18:20:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:09,764 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 [2021-06-05 18:20:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:09,767 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 18:20:09,767 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 18:20:09,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 18:20:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 18:20:09,790 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) [2021-06-05 18:20:09,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 18:20:09,792 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 18:20:09,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:09,793 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 18:20:09,793 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) [2021-06-05 18:20:09,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 18:20:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:09,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:09,795 INFO L554 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] [2021-06-05 18:20:09,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,995 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:09,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:09,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-05 18:20:09,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:09,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708854034] [2021-06-05 18:20:09,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:10,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708854034] [2021-06-05 18:20:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708854034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779149305] [2021-06-05 18:20:10,119 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 [2021-06-05 18:20:10,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:20:10,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:10,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:10,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:10,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779149305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:10,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:10,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153546706] [2021-06-05 18:20:10,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:10,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:10,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:10,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:10,296 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) [2021-06-05 18:20:10,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:10,649 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 18:20:10,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:10,649 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 [2021-06-05 18:20:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:10,652 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 18:20:10,652 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 18:20:10,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 18:20:10,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 18:20:10,676 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) [2021-06-05 18:20:10,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 18:20:10,679 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 18:20:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:10,679 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 18:20:10,679 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) [2021-06-05 18:20:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 18:20:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:10,681 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:10,681 INFO L554 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] [2021-06-05 18:20:10,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:10,882 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:10,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:10,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-05 18:20:10,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:10,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747568165] [2021-06-05 18:20:10,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:11,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:11,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747568165] [2021-06-05 18:20:11,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747568165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:11,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165831404] [2021-06-05 18:20:11,018 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 [2021-06-05 18:20:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:11,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165831404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:11,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:11,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:11,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304585410] [2021-06-05 18:20:11,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:11,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:11,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:11,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:11,224 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) [2021-06-05 18:20:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:11,679 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 18:20:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:11,679 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 [2021-06-05 18:20:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:11,682 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 18:20:11,682 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 18:20:11,682 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 435.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:20:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 18:20:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 18:20:11,704 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) [2021-06-05 18:20:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 18:20:11,707 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 18:20:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:11,707 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 18:20:11,707 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) [2021-06-05 18:20:11,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 18:20:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:11,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:11,709 INFO L554 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] [2021-06-05 18:20:11,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 18:20:11,910 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:11,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-05 18:20:11,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:11,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399034926] [2021-06-05 18:20:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:12,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399034926] [2021-06-05 18:20:12,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399034926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357263503] [2021-06-05 18:20:12,032 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 [2021-06-05 18:20:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:12,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:12,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357263503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:12,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:12,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355451573] [2021-06-05 18:20:12,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:12,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:12,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:12,222 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) [2021-06-05 18:20:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:12,607 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 18:20:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:12,608 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 [2021-06-05 18:20:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:12,611 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 18:20:12,611 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 18:20:12,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:20:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 18:20:12,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 18:20:12,635 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) [2021-06-05 18:20:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 18:20:12,638 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 18:20:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:12,638 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 18:20:12,638 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) [2021-06-05 18:20:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 18:20:12,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:12,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:12,640 INFO L554 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] [2021-06-05 18:20:12,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:12,841 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:12,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:12,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-05 18:20:12,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:12,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172855216] [2021-06-05 18:20:12,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:12,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172855216] [2021-06-05 18:20:12,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172855216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070043991] [2021-06-05 18:20:12,978 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 [2021-06-05 18:20:13,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:20:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:13,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:13,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070043991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:13,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:13,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:13,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010479422] [2021-06-05 18:20:13,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:13,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:13,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:13,186 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) [2021-06-05 18:20:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:13,671 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 18:20:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:13,671 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 [2021-06-05 18:20:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:13,675 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:20:13,675 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:20:13,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:20:13,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 18:20:13,700 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) [2021-06-05 18:20:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 18:20:13,704 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 18:20:13,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:13,704 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 18:20:13,704 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) [2021-06-05 18:20:13,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 18:20:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:13,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:13,706 INFO L554 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] [2021-06-05 18:20:13,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:20:13,906 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:13,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:13,907 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-05 18:20:13,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:13,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183253630] [2021-06-05 18:20:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:14,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183253630] [2021-06-05 18:20:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183253630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373980777] [2021-06-05 18:20:14,048 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 [2021-06-05 18:20:14,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:14,216 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373980777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:14,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:14,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143140492] [2021-06-05 18:20:14,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:14,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:14,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:14,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:14,217 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) [2021-06-05 18:20:14,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:14,631 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 18:20:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:14,631 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 [2021-06-05 18:20:14,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:14,635 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 18:20:14,635 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 18:20:14,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 18:20:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 18:20:14,663 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) [2021-06-05 18:20:14,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 18:20:14,666 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 18:20:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:14,666 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 18:20:14,667 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) [2021-06-05 18:20:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 18:20:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:14,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:14,668 INFO L554 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] [2021-06-05 18:20:14,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:14,869 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:14,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-05 18:20:14,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:14,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107217904] [2021-06-05 18:20:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:14,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:14,999 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107217904] [2021-06-05 18:20:14,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107217904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761329901] [2021-06-05 18:20:14,999 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 [2021-06-05 18:20:15,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:20:15,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:15,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:15,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761329901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:15,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:15,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:15,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237006750] [2021-06-05 18:20:15,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:15,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:15,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:15,200 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) [2021-06-05 18:20:15,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:15,724 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 18:20:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:15,724 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 [2021-06-05 18:20:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:15,728 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 18:20:15,728 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 18:20:15,728 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 494.5ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:15,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 18:20:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 18:20:15,755 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) [2021-06-05 18:20:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 18:20:15,759 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 18:20:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:15,759 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 18:20:15,759 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) [2021-06-05 18:20:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 18:20:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:15,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:15,761 INFO L554 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] [2021-06-05 18:20:15,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:15,961 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:15,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:15,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-05 18:20:15,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:15,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616234010] [2021-06-05 18:20:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:16,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616234010] [2021-06-05 18:20:16,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616234010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335001134] [2021-06-05 18:20:16,072 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 [2021-06-05 18:20:16,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:20:16,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:16,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:16,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335001134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:16,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:20:16,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157768693] [2021-06-05 18:20:16,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:20:16,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:16,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:20:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:20:16,259 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) [2021-06-05 18:20:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:16,693 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 18:20:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:16,694 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 [2021-06-05 18:20:16,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:16,698 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 18:20:16,698 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 18:20:16,698 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 18:20:16,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 18:20:16,727 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) [2021-06-05 18:20:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 18:20:16,731 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 18:20:16,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:16,731 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 18:20:16,731 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) [2021-06-05 18:20:16,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 18:20:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:20:16,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:16,733 INFO L554 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] [2021-06-05 18:20:16,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:16,933 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-05 18:20:16,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:16,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40418973] [2021-06-05 18:20:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40418973] [2021-06-05 18:20:17,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40418973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39659852] [2021-06-05 18:20:17,052 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 [2021-06-05 18:20:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:20:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39659852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:17,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:20:17,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057841575] [2021-06-05 18:20:17,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:17,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:17,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:17,252 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) [2021-06-05 18:20:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:17,842 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 18:20:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:17,842 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 [2021-06-05 18:20:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:17,845 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 18:20:17,845 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 18:20:17,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:17,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 18:20:17,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 18:20:17,865 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) [2021-06-05 18:20:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 18:20:17,867 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 18:20:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:17,867 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 18:20:17,867 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) [2021-06-05 18:20:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 18:20:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:17,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:17,869 INFO L554 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] [2021-06-05 18:20:18,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:18,069 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-05 18:20:18,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:18,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774698442] [2021-06-05 18:20:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:18,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:18,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774698442] [2021-06-05 18:20:18,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774698442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973748834] [2021-06-05 18:20:18,228 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 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 [2021-06-05 18:20:18,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:18,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:18,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:18,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:18,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973748834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:18,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:18,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827016669] [2021-06-05 18:20:18,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:18,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:18,440 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) [2021-06-05 18:20:18,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:18,792 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 18:20:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:18,793 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 [2021-06-05 18:20:18,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:18,795 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 18:20:18,796 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 18:20:18,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 378.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 18:20:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 18:20:18,814 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) [2021-06-05 18:20:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 18:20:18,816 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 18:20:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:18,817 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 18:20:18,817 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) [2021-06-05 18:20:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 18:20:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:18,818 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:18,818 INFO L554 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] [2021-06-05 18:20:19,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:19,019 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-05 18:20:19,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:19,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638242880] [2021-06-05 18:20:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:19,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:19,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638242880] [2021-06-05 18:20:19,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638242880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:19,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617039037] [2021-06-05 18:20:19,171 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 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 [2021-06-05 18:20:19,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:20:19,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:19,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617039037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:19,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:19,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:19,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81178162] [2021-06-05 18:20:19,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:19,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:19,365 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) [2021-06-05 18:20:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,629 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 18:20:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:20:19,630 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 [2021-06-05 18:20:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:19,633 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 18:20:19,634 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 18:20:19,634 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:20:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 18:20:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 18:20:19,655 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) [2021-06-05 18:20:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 18:20:19,658 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 18:20:19,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:19,658 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 18:20:19,658 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) [2021-06-05 18:20:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 18:20:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:19,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:19,660 INFO L554 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] [2021-06-05 18:20:19,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:19,870 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:19,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:19,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-05 18:20:19,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:19,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16433578] [2021-06-05 18:20:19,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:20,031 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:20,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16433578] [2021-06-05 18:20:20,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16433578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662274248] [2021-06-05 18:20:20,031 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 [2021-06-05 18:20:20,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:20,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:20,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662274248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:20,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776477158] [2021-06-05 18:20:20,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:20,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:20,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:20,226 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) [2021-06-05 18:20:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:20,563 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 18:20:20,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:20,563 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 [2021-06-05 18:20:20,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:20,567 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:20:20,568 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:20:20,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:20,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:20:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 18:20:20,597 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) [2021-06-05 18:20:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 18:20:20,599 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 18:20:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:20,599 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 18:20:20,599 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) [2021-06-05 18:20:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 18:20:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:20,601 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:20,601 INFO L554 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] [2021-06-05 18:20:20,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 18:20:20,802 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:20,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:20,802 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-05 18:20:20,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:20,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126955638] [2021-06-05 18:20:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126955638] [2021-06-05 18:20:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126955638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298502523] [2021-06-05 18:20:20,966 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 [2021-06-05 18:20:21,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:20:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298502523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:21,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:21,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774502217] [2021-06-05 18:20:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:21,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:21,150 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) [2021-06-05 18:20:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:21,449 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 18:20:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:20:21,450 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 [2021-06-05 18:20:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:21,453 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 18:20:21,453 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 18:20:21,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:20:21,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 18:20:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 18:20:21,475 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) [2021-06-05 18:20:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 18:20:21,478 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 18:20:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:21,478 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 18:20:21,478 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) [2021-06-05 18:20:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 18:20:21,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:21,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:21,480 INFO L554 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] [2021-06-05 18:20:21,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:21,680 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-05 18:20:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:21,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685057971] [2021-06-05 18:20:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:21,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685057971] [2021-06-05 18:20:21,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685057971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49763321] [2021-06-05 18:20:21,847 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 [2021-06-05 18:20:21,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:20:21,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:21,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:22,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49763321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:22,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:22,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:22,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6051373] [2021-06-05 18:20:22,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:22,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:22,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:22,046 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) [2021-06-05 18:20:22,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:22,436 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 18:20:22,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:22,436 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 [2021-06-05 18:20:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:22,440 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 18:20:22,440 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 18:20:22,440 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:22,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 18:20:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 18:20:22,463 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) [2021-06-05 18:20:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 18:20:22,465 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 18:20:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:22,465 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 18:20:22,465 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) [2021-06-05 18:20:22,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 18:20:22,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:22,467 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:22,467 INFO L554 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] [2021-06-05 18:20:22,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 18:20:22,668 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:22,668 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-05 18:20:22,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:22,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799946043] [2021-06-05 18:20:22,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:22,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799946043] [2021-06-05 18:20:22,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799946043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:22,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825241190] [2021-06-05 18:20:22,804 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 [2021-06-05 18:20:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:22,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:22,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825241190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:23,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:23,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099814956] [2021-06-05 18:20:23,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:23,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:23,007 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) [2021-06-05 18:20:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:23,359 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 18:20:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:23,359 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 [2021-06-05 18:20:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:23,363 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 18:20:23,363 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 18:20:23,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:20:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 18:20:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 18:20:23,389 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) [2021-06-05 18:20:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 18:20:23,392 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 18:20:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:23,392 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 18:20:23,392 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) [2021-06-05 18:20:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 18:20:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:23,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:23,394 INFO L554 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] [2021-06-05 18:20:23,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:23,594 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:23,595 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-05 18:20:23,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:23,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414142869] [2021-06-05 18:20:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414142869] [2021-06-05 18:20:23,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414142869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059742286] [2021-06-05 18:20:23,738 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 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 [2021-06-05 18:20:23,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:23,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:23,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:23,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059742286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:23,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:23,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113561324] [2021-06-05 18:20:23,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:23,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:23,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:23,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:23,944 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) [2021-06-05 18:20:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:24,403 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 18:20:24,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:24,403 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 [2021-06-05 18:20:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:24,406 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 18:20:24,407 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 18:20:24,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:20:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 18:20:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 18:20:24,428 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) [2021-06-05 18:20:24,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 18:20:24,431 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 18:20:24,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:24,431 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 18:20:24,431 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) [2021-06-05 18:20:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 18:20:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:24,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:24,433 INFO L554 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] [2021-06-05 18:20:24,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 18:20:24,635 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:24,635 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-05 18:20:24,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:24,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408847719] [2021-06-05 18:20:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:24,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408847719] [2021-06-05 18:20:24,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408847719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123505597] [2021-06-05 18:20:24,765 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 [2021-06-05 18:20:24,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:20:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:24,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:24,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123505597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:24,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285813955] [2021-06-05 18:20:24,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:24,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:24,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:24,948 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) [2021-06-05 18:20:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:25,331 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 18:20:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:25,331 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 [2021-06-05 18:20:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:25,335 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 18:20:25,335 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 18:20:25,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 369.7ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:20:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 18:20:25,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 18:20:25,364 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) [2021-06-05 18:20:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 18:20:25,368 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 18:20:25,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:25,369 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 18:20:25,369 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) [2021-06-05 18:20:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 18:20:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:25,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:25,371 INFO L554 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] [2021-06-05 18:20:25,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:20:25,572 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:25,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-05 18:20:25,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:25,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658446620] [2021-06-05 18:20:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:25,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658446620] [2021-06-05 18:20:25,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658446620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287654474] [2021-06-05 18:20:25,710 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 [2021-06-05 18:20:25,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:25,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:25,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:25,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:25,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287654474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:25,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006500183] [2021-06-05 18:20:25,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:25,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:25,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:25,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:25,911 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) [2021-06-05 18:20:26,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:26,418 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 18:20:26,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:26,418 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 [2021-06-05 18:20:26,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:26,422 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 18:20:26,422 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 18:20:26,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 473.2ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 18:20:26,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 18:20:26,450 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) [2021-06-05 18:20:26,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 18:20:26,454 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 18:20:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:26,454 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 18:20:26,454 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) [2021-06-05 18:20:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 18:20:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:26,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:26,456 INFO L554 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] [2021-06-05 18:20:26,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:20:26,657 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-05 18:20:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:26,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501500070] [2021-06-05 18:20:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501500070] [2021-06-05 18:20:26,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501500070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784429570] [2021-06-05 18:20:26,783 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 [2021-06-05 18:20:26,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:20:26,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:26,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:26,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784429570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:26,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:26,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135302899] [2021-06-05 18:20:26,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:26,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:26,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:26,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:26,973 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) [2021-06-05 18:20:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:27,401 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 18:20:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:27,402 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 [2021-06-05 18:20:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:27,406 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 18:20:27,406 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 18:20:27,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 392.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:20:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 18:20:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 18:20:27,456 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) [2021-06-05 18:20:27,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 18:20:27,460 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 18:20:27,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:27,460 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 18:20:27,461 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) [2021-06-05 18:20:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 18:20:27,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:27,463 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:27,463 INFO L554 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] [2021-06-05 18:20:27,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:27,663 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:27,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:27,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-05 18:20:27,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:27,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033830753] [2021-06-05 18:20:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:27,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033830753] [2021-06-05 18:20:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033830753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10956532] [2021-06-05 18:20:27,807 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 [2021-06-05 18:20:27,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:20:27,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:27,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:27,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10956532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:27,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:27,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:27,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433193112] [2021-06-05 18:20:27,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:27,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:27,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:27,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:28,000 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) [2021-06-05 18:20:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:28,544 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 18:20:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:28,545 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 [2021-06-05 18:20:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:28,549 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 18:20:28,549 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 18:20:28,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 18:20:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 18:20:28,581 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) [2021-06-05 18:20:28,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 18:20:28,585 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 18:20:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:28,585 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 18:20:28,585 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) [2021-06-05 18:20:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 18:20:28,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:28,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:28,587 INFO L554 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] [2021-06-05 18:20:28,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 18:20:28,788 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:28,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:28,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-05 18:20:28,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:28,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81587740] [2021-06-05 18:20:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:28,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81587740] [2021-06-05 18:20:28,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81587740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:28,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724880379] [2021-06-05 18:20:28,925 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 [2021-06-05 18:20:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:28,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:29,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724880379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:29,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:29,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762153793] [2021-06-05 18:20:29,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:29,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:29,110 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) [2021-06-05 18:20:29,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:29,557 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 18:20:29,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:29,558 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 [2021-06-05 18:20:29,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:29,562 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 18:20:29,562 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 18:20:29,562 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:29,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 18:20:29,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 18:20:29,595 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) [2021-06-05 18:20:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 18:20:29,600 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 18:20:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:29,600 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 18:20:29,600 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) [2021-06-05 18:20:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 18:20:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:29,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:29,603 INFO L554 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] [2021-06-05 18:20:29,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:29,807 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-05 18:20:29,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:29,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380207544] [2021-06-05 18:20:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:29,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:29,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380207544] [2021-06-05 18:20:29,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380207544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322612373] [2021-06-05 18:20:29,961 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 [2021-06-05 18:20:30,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:30,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:30,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:30,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322612373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:30,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:20:30,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678886643] [2021-06-05 18:20:30,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:20:30,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:30,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:20:30,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:20:30,149 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) [2021-06-05 18:20:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:30,746 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 18:20:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:20:30,747 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 [2021-06-05 18:20:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:30,750 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 18:20:30,750 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 18:20:30,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:20:30,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 18:20:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 18:20:30,780 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) [2021-06-05 18:20:30,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 18:20:30,784 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 18:20:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:30,784 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 18:20:30,784 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) [2021-06-05 18:20:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 18:20:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:30,786 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:30,787 INFO L554 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] [2021-06-05 18:20:30,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:20:30,988 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:30,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:30,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-05 18:20:30,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:30,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595123160] [2021-06-05 18:20:30,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595123160] [2021-06-05 18:20:31,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595123160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359017268] [2021-06-05 18:20:31,116 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 [2021-06-05 18:20:31,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:20:31,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:31,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:31,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359017268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:31,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:20:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178565385] [2021-06-05 18:20:31,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:20:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:20:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:20:31,295 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) [2021-06-05 18:20:31,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:31,778 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 18:20:31,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:31,778 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 [2021-06-05 18:20:31,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:31,783 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 18:20:31,783 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 18:20:31,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:31,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 18:20:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 18:20:31,816 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) [2021-06-05 18:20:31,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 18:20:31,820 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 18:20:31,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:31,820 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 18:20:31,820 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) [2021-06-05 18:20:31,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 18:20:31,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:20:31,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:31,822 INFO L554 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] [2021-06-05 18:20:32,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:32,023 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:32,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:32,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-05 18:20:32,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:32,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264307003] [2021-06-05 18:20:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:32,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264307003] [2021-06-05 18:20:32,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264307003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124979736] [2021-06-05 18:20:32,169 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 [2021-06-05 18:20:32,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:32,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:20:32,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:32,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124979736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:32,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:20:32,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001775660] [2021-06-05 18:20:32,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:32,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:32,365 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) [2021-06-05 18:20:33,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,037 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-05 18:20:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:20:33,037 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 [2021-06-05 18:20:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:33,041 INFO L225 Difference]: With dead ends: 4651 [2021-06-05 18:20:33,042 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:20:33,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:20:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:20:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:20:33,069 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) [2021-06-05 18:20:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:33,073 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-05 18:20:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:33,073 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:33,073 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) [2021-06-05 18:20:33,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:33,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:33,075 INFO L554 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] [2021-06-05 18:20:33,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:33,276 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:33,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:33,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-05 18:20:33,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:33,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879060563] [2021-06-05 18:20:33,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:33,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:33,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879060563] [2021-06-05 18:20:33,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879060563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:33,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698553912] [2021-06-05 18:20:33,436 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 [2021-06-05 18:20:33,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:20:33,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:33,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:33,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:33,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698553912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:33,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:33,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:33,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141581977] [2021-06-05 18:20:33,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:33,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:33,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:33,648 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) [2021-06-05 18:20:33,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,971 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:20:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:33,971 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 [2021-06-05 18:20:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:33,975 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:20:33,976 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:20:33,976 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:20:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:20:34,007 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) [2021-06-05 18:20:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:34,012 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:34,012 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:34,012 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) [2021-06-05 18:20:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:34,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:34,015 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:34,015 INFO L554 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] [2021-06-05 18:20:34,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 18:20:34,224 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:34,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:34,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-05 18:20:34,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:34,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718151575] [2021-06-05 18:20:34,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:34,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718151575] [2021-06-05 18:20:34,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718151575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628215695] [2021-06-05 18:20:34,414 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 [2021-06-05 18:20:34,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:20:34,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628215695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:34,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:34,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370522143] [2021-06-05 18:20:34,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:34,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:34,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:34,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:34,640 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) [2021-06-05 18:20:35,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:35,013 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-05 18:20:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:35,013 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 [2021-06-05 18:20:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:35,017 INFO L225 Difference]: With dead ends: 4641 [2021-06-05 18:20:35,017 INFO L226 Difference]: Without dead ends: 4371 [2021-06-05 18:20:35,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:20:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-05 18:20:35,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-05 18:20:35,048 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) [2021-06-05 18:20:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:35,053 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:35,053 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:35,053 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) [2021-06-05 18:20:35,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:35,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:35,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:35,056 INFO L554 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] [2021-06-05 18:20:35,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:35,256 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:35,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:35,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-05 18:20:35,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:35,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474006894] [2021-06-05 18:20:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:35,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474006894] [2021-06-05 18:20:35,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474006894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382645371] [2021-06-05 18:20:35,411 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 [2021-06-05 18:20:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:35,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382645371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:35,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:35,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547266085] [2021-06-05 18:20:35,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:35,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:35,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:35,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:35,615 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) [2021-06-05 18:20:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:35,967 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-05 18:20:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:35,968 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 [2021-06-05 18:20:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:35,972 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:20:35,972 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:20:35,972 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 384.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:20:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:20:35,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-05 18:20:36,001 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) [2021-06-05 18:20:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:36,006 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:36,006 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:36,006 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) [2021-06-05 18:20:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:36,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:36,009 INFO L554 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] [2021-06-05 18:20:36,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:36,209 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-05 18:20:36,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:36,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441171980] [2021-06-05 18:20:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:36,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:36,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441171980] [2021-06-05 18:20:36,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441171980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:36,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224856520] [2021-06-05 18:20:36,381 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 [2021-06-05 18:20:36,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:36,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224856520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:36,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:36,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:36,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579568519] [2021-06-05 18:20:36,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:36,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:36,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:36,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:36,614 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) [2021-06-05 18:20:37,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:37,045 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-05 18:20:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:37,046 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 [2021-06-05 18:20:37,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:37,050 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:20:37,050 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:20:37,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 462.6ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:20:37,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-05 18:20:37,080 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) [2021-06-05 18:20:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:37,084 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:37,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:37,084 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:37,084 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) [2021-06-05 18:20:37,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:37,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:37,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:37,087 INFO L554 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] [2021-06-05 18:20:37,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:20:37,287 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-05 18:20:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:37,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076173932] [2021-06-05 18:20:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:37,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:37,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076173932] [2021-06-05 18:20:37,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076173932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839523213] [2021-06-05 18:20:37,445 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 [2021-06-05 18:20:37,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:20:37,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:37,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:37,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839523213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:37,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:37,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048319519] [2021-06-05 18:20:37,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:37,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:37,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:37,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:37,656 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) [2021-06-05 18:20:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:38,051 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-05 18:20:38,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:38,052 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 [2021-06-05 18:20:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:38,056 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:20:38,056 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:20:38,056 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 404.1ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:20:38,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:20:38,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-05 18:20:38,087 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) [2021-06-05 18:20:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:38,091 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:38,091 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:38,091 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) [2021-06-05 18:20:38,091 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:38,093 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:38,093 INFO L554 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] [2021-06-05 18:20:38,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:20:38,294 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:38,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:38,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-05 18:20:38,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:38,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760808079] [2021-06-05 18:20:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:38,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760808079] [2021-06-05 18:20:38,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760808079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439551792] [2021-06-05 18:20:38,464 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 [2021-06-05 18:20:38,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439551792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:38,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:38,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919106619] [2021-06-05 18:20:38,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:38,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:38,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:38,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:38,703 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) [2021-06-05 18:20:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:39,194 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-05 18:20:39,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:39,194 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 [2021-06-05 18:20:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:39,199 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:20:39,199 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:20:39,199 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:20:39,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-05 18:20:39,233 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) [2021-06-05 18:20:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:39,238 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:39,238 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:39,238 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) [2021-06-05 18:20:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:39,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:39,241 INFO L554 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] [2021-06-05 18:20:39,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:20:39,442 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:39,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:39,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-05 18:20:39,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:39,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387177905] [2021-06-05 18:20:39,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:39,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:39,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387177905] [2021-06-05 18:20:39,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387177905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784708203] [2021-06-05 18:20:39,583 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 [2021-06-05 18:20:39,643 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:20:39,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:39,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:39,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:39,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784708203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:39,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:39,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550014749] [2021-06-05 18:20:39,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:39,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:39,781 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) [2021-06-05 18:20:40,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:40,204 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-05 18:20:40,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:40,204 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 [2021-06-05 18:20:40,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:40,208 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:20:40,208 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:20:40,208 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:40,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:20:40,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-05 18:20:40,236 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) [2021-06-05 18:20:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:40,241 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:40,241 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:40,241 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) [2021-06-05 18:20:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:40,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:40,243 INFO L554 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] [2021-06-05 18:20:40,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:40,444 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:40,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:40,445 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-05 18:20:40,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:40,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212274527] [2021-06-05 18:20:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:40,593 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:40,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:40,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212274527] [2021-06-05 18:20:40,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212274527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426938628] [2021-06-05 18:20:40,593 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 [2021-06-05 18:20:40,656 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:20:40,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:40,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:40,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426938628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:40,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:40,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053587843] [2021-06-05 18:20:40,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:40,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:40,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:40,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:40,825 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) [2021-06-05 18:20:41,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:41,358 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:20:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:41,359 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 [2021-06-05 18:20:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:41,363 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:20:41,363 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:20:41,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:20:41,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:20:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:20:41,397 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) [2021-06-05 18:20:41,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:41,402 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:41,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:41,402 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:41,403 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) [2021-06-05 18:20:41,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:41,405 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:41,405 INFO L554 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] [2021-06-05 18:20:41,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 18:20:41,606 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:41,606 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-05 18:20:41,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:41,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060476011] [2021-06-05 18:20:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060476011] [2021-06-05 18:20:41,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060476011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354180353] [2021-06-05 18:20:41,744 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 [2021-06-05 18:20:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354180353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:41,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:41,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189834452] [2021-06-05 18:20:41,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:41,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:41,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:41,940 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) [2021-06-05 18:20:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:42,412 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-05 18:20:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:42,412 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 [2021-06-05 18:20:42,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:42,416 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:20:42,416 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:20:42,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 447.4ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:20:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:20:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:20:42,446 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) [2021-06-05 18:20:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:42,450 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:42,451 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:42,451 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) [2021-06-05 18:20:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:42,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:42,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:42,453 INFO L554 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] [2021-06-05 18:20:42,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:20:42,653 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:42,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-05 18:20:42,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511429970] [2021-06-05 18:20:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:42,789 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:42,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:42,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511429970] [2021-06-05 18:20:42,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511429970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:42,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648306694] [2021-06-05 18:20:42,790 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 [2021-06-05 18:20:42,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:42,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:42,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:43,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648306694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:43,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:43,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:43,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204372454] [2021-06-05 18:20:43,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:43,032 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) [2021-06-05 18:20:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:43,621 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-05 18:20:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:20:43,621 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 [2021-06-05 18:20:43,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:43,625 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:20:43,625 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:20:43,626 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:20:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-05 18:20:43,656 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) [2021-06-05 18:20:43,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:43,660 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:43,660 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:43,660 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) [2021-06-05 18:20:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:43,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:43,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:43,663 INFO L554 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] [2021-06-05 18:20:43,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 18:20:43,874 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-05 18:20:43,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:43,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371487425] [2021-06-05 18:20:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371487425] [2021-06-05 18:20:44,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371487425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:44,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529605523] [2021-06-05 18:20:44,013 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 [2021-06-05 18:20:44,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:20:44,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:44,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529605523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:44,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:44,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:44,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393422895] [2021-06-05 18:20:44,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:44,208 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) [2021-06-05 18:20:44,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:44,708 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-05 18:20:44,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:20:44,708 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 [2021-06-05 18:20:44,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:44,712 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:20:44,712 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:20:44,713 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:20:44,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-05 18:20:44,740 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) [2021-06-05 18:20:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:20:44,744 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:20:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:44,744 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:20:44,744 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) [2021-06-05 18:20:44,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:20:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:44,746 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:44,746 INFO L554 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] [2021-06-05 18:20:44,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:44,947 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-05 18:20:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:44,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340533456] [2021-06-05 18:20:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:44,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340533456] [2021-06-05 18:20:45,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340533456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791211385] [2021-06-05 18:20:45,083 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 [2021-06-05 18:20:45,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:45,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:45,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791211385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:45,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:45,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917011898] [2021-06-05 18:20:45,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:45,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:45,326 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) [2021-06-05 18:20:45,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:45,955 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-05 18:20:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:20:45,955 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 [2021-06-05 18:20:45,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:45,959 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 18:20:45,959 INFO L226 Difference]: Without dead ends: 3936 [2021-06-05 18:20:45,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 594.9ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-05 18:20:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-05 18:20:45,987 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) [2021-06-05 18:20:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-05 18:20:45,991 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-05 18:20:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:45,991 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-05 18:20:45,991 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) [2021-06-05 18:20:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-05 18:20:45,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:45,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:45,994 INFO L554 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] [2021-06-05 18:20:46,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:46,195 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:46,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:46,195 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-05 18:20:46,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:46,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210759384] [2021-06-05 18:20:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:46,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210759384] [2021-06-05 18:20:46,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210759384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:46,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765757640] [2021-06-05 18:20:46,334 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 [2021-06-05 18:20:46,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:20:46,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:46,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:46,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765757640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:46,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:46,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:20:46,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100642172] [2021-06-05 18:20:46,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:20:46,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:46,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:20:46,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:20:46,526 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) [2021-06-05 18:20:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:47,067 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-05 18:20:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:20:47,067 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 [2021-06-05 18:20:47,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:47,073 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 18:20:47,073 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 18:20:47,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 18:20:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-05 18:20:47,113 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) [2021-06-05 18:20:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-05 18:20:47,119 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-05 18:20:47,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:47,119 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-05 18:20:47,119 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) [2021-06-05 18:20:47,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-05 18:20:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:20:47,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:47,122 INFO L554 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] [2021-06-05 18:20:47,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:47,323 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-05 18:20:47,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:47,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068672026] [2021-06-05 18:20:47,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:47,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:47,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068672026] [2021-06-05 18:20:47,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068672026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:47,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983361676] [2021-06-05 18:20:47,482 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 [2021-06-05 18:20:47,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:20:47,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:47,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:20:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983361676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:47,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:47,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:20:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729443512] [2021-06-05 18:20:47,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:47,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:47,689 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) [2021-06-05 18:20:48,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:48,384 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-05 18:20:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:20:48,385 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 [2021-06-05 18:20:48,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:48,389 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 18:20:48,389 INFO L226 Difference]: Without dead ends: 4241 [2021-06-05 18:20:48,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-05 18:20:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-05 18:20:48,413 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) [2021-06-05 18:20:48,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-05 18:20:48,415 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-05 18:20:48,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:48,415 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-05 18:20:48,415 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) [2021-06-05 18:20:48,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-05 18:20:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:48,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:48,417 INFO L554 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] [2021-06-05 18:20:48,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 18:20:48,618 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-05 18:20:48,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:48,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516180512] [2021-06-05 18:20:48,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:48,794 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:48,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516180512] [2021-06-05 18:20:48,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516180512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:48,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522206200] [2021-06-05 18:20:48,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:20:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:48,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:20:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522206200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:49,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:49,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 18:20:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575871298] [2021-06-05 18:20:49,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:49,024 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) [2021-06-05 18:20:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:49,422 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-05 18:20:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:49,423 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 [2021-06-05 18:20:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:49,426 INFO L225 Difference]: With dead ends: 3364 [2021-06-05 18:20:49,426 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 18:20:49,426 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 18:20:49,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-05 18:20:49,458 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) [2021-06-05 18:20:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-05 18:20:49,461 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-05 18:20:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:49,461 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-05 18:20:49,461 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) [2021-06-05 18:20:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-05 18:20:49,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:49,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:49,463 INFO L554 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] [2021-06-05 18:20:49,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:20:49,663 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:49,664 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-05 18:20:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:49,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725792043] [2021-06-05 18:20:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:49,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725792043] [2021-06-05 18:20:49,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725792043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:49,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484610290] [2021-06-05 18:20:49,854 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 [2021-06-05 18:20:49,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:49,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:49,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484610290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:50,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:50,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:20:50,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570461577] [2021-06-05 18:20:50,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:50,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:50,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:50,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:50,066 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) [2021-06-05 18:20:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:50,382 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-05 18:20:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:20:50,382 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 [2021-06-05 18:20:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:50,386 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 18:20:50,386 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 18:20:50,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 376.1ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:20:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 18:20:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-05 18:20:50,410 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) [2021-06-05 18:20:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-05 18:20:50,413 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-05 18:20:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:50,413 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-05 18:20:50,413 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) [2021-06-05 18:20:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-05 18:20:50,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:50,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:50,415 INFO L554 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] [2021-06-05 18:20:50,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 18:20:50,616 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:50,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-05 18:20:50,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:50,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265581515] [2021-06-05 18:20:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:50,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265581515] [2021-06-05 18:20:50,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265581515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971142225] [2021-06-05 18:20:50,815 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 [2021-06-05 18:20:50,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:20:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:50,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:50,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:51,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971142225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:51,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:20:51,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527057045] [2021-06-05 18:20:51,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:51,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:51,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:51,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:51,042 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) [2021-06-05 18:20:51,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:51,423 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-05 18:20:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:51,424 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 [2021-06-05 18:20:51,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:51,428 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 18:20:51,428 INFO L226 Difference]: Without dead ends: 3776 [2021-06-05 18:20:51,428 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 450.2ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-05 18:20:51,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-05 18:20:51,456 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) [2021-06-05 18:20:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-05 18:20:51,460 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-05 18:20:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:51,460 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-05 18:20:51,460 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) [2021-06-05 18:20:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-05 18:20:51,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:51,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:51,462 INFO L554 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] [2021-06-05 18:20:51,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:20:51,663 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:51,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:51,663 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-05 18:20:51,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:51,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101787516] [2021-06-05 18:20:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:51,851 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:51,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:51,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101787516] [2021-06-05 18:20:51,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101787516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:51,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47124243] [2021-06-05 18:20:51,851 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 [2021-06-05 18:20:51,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:51,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:51,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:51,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:52,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47124243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:52,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:20:52,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975071699] [2021-06-05 18:20:52,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:52,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:52,074 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) [2021-06-05 18:20:52,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:52,420 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-05 18:20:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:20:52,420 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 [2021-06-05 18:20:52,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:52,424 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 18:20:52,424 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 18:20:52,424 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:20:52,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 18:20:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-05 18:20:52,455 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) [2021-06-05 18:20:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-05 18:20:52,458 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-05 18:20:52,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:52,459 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-05 18:20:52,459 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) [2021-06-05 18:20:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-05 18:20:52,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:52,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:52,461 INFO L554 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] [2021-06-05 18:20:52,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 18:20:52,663 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:52,663 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-05 18:20:52,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:52,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974850649] [2021-06-05 18:20:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:52,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:52,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974850649] [2021-06-05 18:20:52,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974850649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:52,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507060241] [2021-06-05 18:20:52,851 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 [2021-06-05 18:20:52,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:20:52,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:52,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:52,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:53,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507060241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:53,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:53,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:20:53,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722944214] [2021-06-05 18:20:53,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:53,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:53,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:53,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:53,072 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) [2021-06-05 18:20:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:53,531 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-05 18:20:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:53,531 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 [2021-06-05 18:20:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:53,536 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 18:20:53,536 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 18:20:53,536 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 477.9ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 18:20:53,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-05 18:20:53,569 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) [2021-06-05 18:20:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-05 18:20:53,573 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-05 18:20:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:53,574 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-05 18:20:53,574 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) [2021-06-05 18:20:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-05 18:20:53,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:53,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:53,576 INFO L554 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] [2021-06-05 18:20:53,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:53,778 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:53,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:53,778 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-05 18:20:53,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:53,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44959092] [2021-06-05 18:20:53,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:53,957 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:53,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44959092] [2021-06-05 18:20:53,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44959092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:53,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304130128] [2021-06-05 18:20:53,958 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 [2021-06-05 18:20:54,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:20:54,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:54,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:54,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304130128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:54,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:54,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:20:54,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281163382] [2021-06-05 18:20:54,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:54,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:54,193 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) [2021-06-05 18:20:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:54,571 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-05 18:20:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:54,572 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 [2021-06-05 18:20:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:54,575 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 18:20:54,576 INFO L226 Difference]: Without dead ends: 3876 [2021-06-05 18:20:54,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-05 18:20:54,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-05 18:20:54,607 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) [2021-06-05 18:20:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-05 18:20:54,611 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-05 18:20:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:54,611 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-05 18:20:54,611 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) [2021-06-05 18:20:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-05 18:20:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:54,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:54,613 INFO L554 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] [2021-06-05 18:20:54,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 18:20:54,814 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-05 18:20:54,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:54,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628806748] [2021-06-05 18:20:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:54,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628806748] [2021-06-05 18:20:54,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628806748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853120217] [2021-06-05 18:20:54,981 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 [2021-06-05 18:20:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:55,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:55,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853120217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:55,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:55,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:20:55,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059232174] [2021-06-05 18:20:55,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:55,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:55,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:55,199 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) [2021-06-05 18:20:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:55,693 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-05 18:20:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:55,693 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 [2021-06-05 18:20:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:55,697 INFO L225 Difference]: With dead ends: 4171 [2021-06-05 18:20:55,697 INFO L226 Difference]: Without dead ends: 3901 [2021-06-05 18:20:55,697 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-05 18:20:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-05 18:20:55,723 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) [2021-06-05 18:20:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-05 18:20:55,726 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-05 18:20:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:55,726 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-05 18:20:55,726 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) [2021-06-05 18:20:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-05 18:20:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:55,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:55,728 INFO L554 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] [2021-06-05 18:20:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:20:55,929 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-05 18:20:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625270328] [2021-06-05 18:20:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:56,081 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:56,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625270328] [2021-06-05 18:20:56,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625270328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175601587] [2021-06-05 18:20:56,082 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 [2021-06-05 18:20:56,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:56,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:56,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:56,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:56,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175601587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:56,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:56,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:20:56,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411222098] [2021-06-05 18:20:56,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:56,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:56,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:56,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:56,316 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) [2021-06-05 18:20:56,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:56,735 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-05 18:20:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:56,735 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 [2021-06-05 18:20:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:56,740 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:20:56,740 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:20:56,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:20:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-05 18:20:56,774 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) [2021-06-05 18:20:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-05 18:20:56,778 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-05 18:20:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-05 18:20:56,778 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) [2021-06-05 18:20:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-05 18:20:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:56,781 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:56,781 INFO L554 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] [2021-06-05 18:20:56,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:56,982 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:56,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:56,983 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-05 18:20:56,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:56,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733957294] [2021-06-05 18:20:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:56,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:57,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733957294] [2021-06-05 18:20:57,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733957294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044597463] [2021-06-05 18:20:57,143 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 [2021-06-05 18:20:57,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:20:57,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:57,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:57,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044597463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:57,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:57,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:20:57,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817591850] [2021-06-05 18:20:57,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:57,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:57,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:57,369 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) [2021-06-05 18:20:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:57,912 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-05 18:20:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:57,912 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 [2021-06-05 18:20:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:57,916 INFO L225 Difference]: With dead ends: 4221 [2021-06-05 18:20:57,916 INFO L226 Difference]: Without dead ends: 3951 [2021-06-05 18:20:57,916 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 546.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:20:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-05 18:20:57,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-05 18:20:57,945 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) [2021-06-05 18:20:57,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-05 18:20:57,949 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-05 18:20:57,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:57,949 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-05 18:20:57,949 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) [2021-06-05 18:20:57,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-05 18:20:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:57,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:57,951 INFO L554 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] [2021-06-05 18:20:58,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:58,151 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:58,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-05 18:20:58,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:58,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437787425] [2021-06-05 18:20:58,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:58,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:58,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437787425] [2021-06-05 18:20:58,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437787425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:58,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690739493] [2021-06-05 18:20:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:20:58,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:58,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:58,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:58,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690739493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:58,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:58,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:20:58,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424054453] [2021-06-05 18:20:58,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:20:58,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:20:58,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:20:58,513 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) [2021-06-05 18:20:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:58,972 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-05 18:20:58,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:58,972 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 [2021-06-05 18:20:58,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:58,977 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:20:58,977 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:20:58,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:20:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-05 18:20:59,013 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) [2021-06-05 18:20:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-05 18:20:59,018 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-05 18:20:59,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:59,018 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-05 18:20:59,018 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) [2021-06-05 18:20:59,018 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-05 18:20:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:20:59,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:59,020 INFO L554 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] [2021-06-05 18:20:59,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:59,221 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-05 18:20:59,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:59,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460273915] [2021-06-05 18:20:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:59,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460273915] [2021-06-05 18:20:59,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460273915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760896926] [2021-06-05 18:20:59,372 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 [2021-06-05 18:20:59,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:20:59,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:59,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:59,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:59,589 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:59,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760896926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:59,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:59,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:20:59,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477246530] [2021-06-05 18:20:59,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:59,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:59,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:59,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:20:59,590 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) [2021-06-05 18:21:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:00,196 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-05 18:21:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:00,196 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 [2021-06-05 18:21:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:00,200 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:21:00,200 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:21:00,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 589.5ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:21:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-05 18:21:00,231 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) [2021-06-05 18:21:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-05 18:21:00,235 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-05 18:21:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:00,235 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-05 18:21:00,235 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) [2021-06-05 18:21:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-05 18:21:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:00,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:00,237 INFO L554 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] [2021-06-05 18:21:00,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:21:00,442 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:00,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:00,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-05 18:21:00,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:00,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29661031] [2021-06-05 18:21:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29661031] [2021-06-05 18:21:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29661031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85590718] [2021-06-05 18:21:00,629 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 [2021-06-05 18:21:00,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:21:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:00,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:00,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85590718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:21:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633369475] [2021-06-05 18:21:00,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:00,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:00,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:00,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:00,850 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) [2021-06-05 18:21:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:01,349 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-05 18:21:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:01,349 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 [2021-06-05 18:21:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:01,353 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:21:01,353 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:21:01,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 492.4ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:21:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:21:01,383 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) [2021-06-05 18:21:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-05 18:21:01,387 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-05 18:21:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:01,387 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-05 18:21:01,387 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) [2021-06-05 18:21:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-05 18:21:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:01,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:01,390 INFO L554 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] [2021-06-05 18:21:01,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:21:01,598 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:01,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:01,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-05 18:21:01,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:01,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639116341] [2021-06-05 18:21:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:01,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:01,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:01,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639116341] [2021-06-05 18:21:01,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639116341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:01,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555854002] [2021-06-05 18:21:01,745 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 [2021-06-05 18:21:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:01,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:01,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:01,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555854002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:01,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:01,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:01,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499889868] [2021-06-05 18:21:01,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:01,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:01,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:01,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:01,956 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) [2021-06-05 18:21:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:02,618 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-05 18:21:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:21:02,618 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 [2021-06-05 18:21:02,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:02,622 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:21:02,622 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:21:02,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 639.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:02,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:21:02,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-05 18:21:02,654 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) [2021-06-05 18:21:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-05 18:21:02,659 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-05 18:21:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:02,659 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-05 18:21:02,660 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) [2021-06-05 18:21:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-05 18:21:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:02,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:02,662 INFO L554 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] [2021-06-05 18:21:02,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:02,863 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-05 18:21:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:02,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323232238] [2021-06-05 18:21:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:03,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323232238] [2021-06-05 18:21:03,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323232238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225589265] [2021-06-05 18:21:03,004 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 [2021-06-05 18:21:03,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:03,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:03,198 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:03,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225589265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:03,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:03,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:21:03,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955399602] [2021-06-05 18:21:03,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:03,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:03,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:03,199 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) [2021-06-05 18:21:03,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:03,732 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-05 18:21:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:21:03,732 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 [2021-06-05 18:21:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:03,737 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 18:21:03,737 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 18:21:03,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:03,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 18:21:03,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-05 18:21:03,777 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) [2021-06-05 18:21:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-05 18:21:03,782 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-05 18:21:03,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:03,782 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-05 18:21:03,782 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) [2021-06-05 18:21:03,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-05 18:21:03,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:03,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:03,784 INFO L554 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] [2021-06-05 18:21:03,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:21:03,985 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:03,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-05 18:21:03,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:03,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191712964] [2021-06-05 18:21:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:04,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:04,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191712964] [2021-06-05 18:21:04,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191712964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:04,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383349299] [2021-06-05 18:21:04,128 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 [2021-06-05 18:21:04,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:21:04,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:04,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:04,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:04,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383349299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:04,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:04,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:04,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826523999] [2021-06-05 18:21:04,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:04,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:04,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:04,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:04,341 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) [2021-06-05 18:21:05,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:05,113 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-05 18:21:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:21:05,114 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 [2021-06-05 18:21:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:05,117 INFO L225 Difference]: With dead ends: 4969 [2021-06-05 18:21:05,117 INFO L226 Difference]: Without dead ends: 4346 [2021-06-05 18:21:05,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 704.8ms TimeCoverageRelationStatistics Valid=866, Invalid=2556, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:21:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-05 18:21:05,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-05 18:21:05,148 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) [2021-06-05 18:21:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 18:21:05,152 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 18:21:05,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:05,152 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 18:21:05,152 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) [2021-06-05 18:21:05,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 18:21:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:05,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:05,155 INFO L554 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] [2021-06-05 18:21:05,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:21:05,356 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-05 18:21:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:05,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975083101] [2021-06-05 18:21:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:05,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:05,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975083101] [2021-06-05 18:21:05,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975083101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:05,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151189904] [2021-06-05 18:21:05,522 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 [2021-06-05 18:21:05,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:05,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:05,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151189904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:05,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:05,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:21:05,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469343038] [2021-06-05 18:21:05,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:05,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:05,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:05,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:05,716 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) [2021-06-05 18:21:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:06,284 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 18:21:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:21:06,284 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 [2021-06-05 18:21:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:06,289 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 18:21:06,289 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 18:21:06,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 18:21:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 18:21:06,326 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) [2021-06-05 18:21:06,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 18:21:06,331 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 18:21:06,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:06,331 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 18:21:06,331 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) [2021-06-05 18:21:06,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 18:21:06,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:21:06,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:06,334 INFO L554 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] [2021-06-05 18:21:06,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 18:21:06,535 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:06,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:06,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-05 18:21:06,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:06,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8478514] [2021-06-05 18:21:06,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:06,701 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8478514] [2021-06-05 18:21:06,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8478514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407296302] [2021-06-05 18:21:06,701 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 [2021-06-05 18:21:06,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:21:06,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:21:06,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407296302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:06,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:06,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:21:06,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358862457] [2021-06-05 18:21:06,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:06,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:06,986 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) [2021-06-05 18:21:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:07,880 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 18:21:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:21:07,881 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 [2021-06-05 18:21:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:07,886 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:21:07,886 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 18:21:07,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 845.1ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:21:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 18:21:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 18:21:07,916 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) [2021-06-05 18:21:07,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 18:21:07,919 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 18:21:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:07,920 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 18:21:07,920 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) [2021-06-05 18:21:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 18:21:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:07,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:07,922 INFO L554 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] [2021-06-05 18:21:08,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:08,123 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-05 18:21:08,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:08,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283862958] [2021-06-05 18:21:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:08,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:08,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283862958] [2021-06-05 18:21:08,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283862958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:08,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564095183] [2021-06-05 18:21:08,306 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 [2021-06-05 18:21:08,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:21:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:08,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:08,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564095183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:08,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:08,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:08,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265220758] [2021-06-05 18:21:08,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:08,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:08,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:08,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:08,510 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:08,899 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 18:21:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:21:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:08,903 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:21:08,903 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 18:21:08,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:21:08,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 18:21:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 18:21:08,931 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) [2021-06-05 18:21:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 18:21:08,934 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 18:21:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:08,934 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 18:21:08,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 18:21:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:08,936 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:08,936 INFO L554 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] [2021-06-05 18:21:09,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:09,137 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-05 18:21:09,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:09,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865359209] [2021-06-05 18:21:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:09,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:09,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865359209] [2021-06-05 18:21:09,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865359209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183642565] [2021-06-05 18:21:09,351 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 [2021-06-05 18:21:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:09,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:09,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:09,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183642565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:09,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:09,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:09,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106649879] [2021-06-05 18:21:09,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:09,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:09,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:09,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:09,566 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:09,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:09,974 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 18:21:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:09,975 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 [2021-06-05 18:21:09,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:09,979 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 18:21:09,979 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 18:21:09,979 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 482.9ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 18:21:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 18:21:10,008 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) [2021-06-05 18:21:10,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 18:21:10,011 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 18:21:10,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:10,012 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 18:21:10,012 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) [2021-06-05 18:21:10,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 18:21:10,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:10,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:10,014 INFO L554 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] [2021-06-05 18:21:10,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:10,214 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-05 18:21:10,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:10,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630459518] [2021-06-05 18:21:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:10,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:10,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630459518] [2021-06-05 18:21:10,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630459518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:10,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420093769] [2021-06-05 18:21:10,400 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 [2021-06-05 18:21:10,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:10,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:10,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420093769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:10,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:10,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:10,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330356928] [2021-06-05 18:21:10,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:10,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:10,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:10,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:10,600 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:11,009 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 18:21:11,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:11,010 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:11,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:11,013 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:21:11,014 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:21:11,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 437.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:21:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 18:21:11,042 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) [2021-06-05 18:21:11,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 18:21:11,046 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 18:21:11,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:11,046 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 18:21:11,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:11,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 18:21:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:11,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:11,048 INFO L554 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] [2021-06-05 18:21:11,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 18:21:11,249 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-05 18:21:11,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:11,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155764125] [2021-06-05 18:21:11,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:11,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155764125] [2021-06-05 18:21:11,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155764125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160530514] [2021-06-05 18:21:11,452 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 [2021-06-05 18:21:11,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:21:11,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:11,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:11,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160530514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:11,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:11,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:11,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762223863] [2021-06-05 18:21:11,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:11,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:11,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:11,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:11,672 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:12,129 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 18:21:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:21:12,129 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 [2021-06-05 18:21:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:12,133 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:21:12,133 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:21:12,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:21:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 18:21:12,157 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) [2021-06-05 18:21:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 18:21:12,160 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 18:21:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:12,161 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 18:21:12,161 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) [2021-06-05 18:21:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 18:21:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:12,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:12,162 INFO L554 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] [2021-06-05 18:21:12,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:12,363 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:12,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:12,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-05 18:21:12,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:12,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268797140] [2021-06-05 18:21:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:12,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268797140] [2021-06-05 18:21:12,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268797140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748176722] [2021-06-05 18:21:12,542 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 [2021-06-05 18:21:12,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:12,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:12,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748176722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:12,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:12,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:12,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140105059] [2021-06-05 18:21:12,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:12,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:12,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:12,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:12,739 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:13,172 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 18:21:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:13,174 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:13,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:13,178 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:21:13,178 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:21:13,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 449.4ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:21:13,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 18:21:13,205 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) [2021-06-05 18:21:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 18:21:13,209 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 18:21:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:13,209 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 18:21:13,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 18:21:13,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:13,211 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:13,211 INFO L554 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] [2021-06-05 18:21:13,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:21:13,411 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:13,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:13,412 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-05 18:21:13,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:13,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216864460] [2021-06-05 18:21:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:13,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216864460] [2021-06-05 18:21:13,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216864460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:13,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696629927] [2021-06-05 18:21:13,660 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 [2021-06-05 18:21:13,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:21:13,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:13,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:13,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:13,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696629927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:13,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:13,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:13,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263904733] [2021-06-05 18:21:13,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:13,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:13,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:13,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:13,876 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:14,451 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 18:21:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:14,451 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 [2021-06-05 18:21:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:14,456 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:21:14,456 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:21:14,456 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:21:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 18:21:14,491 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) [2021-06-05 18:21:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 18:21:14,495 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 18:21:14,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:14,496 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 18:21:14,496 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) [2021-06-05 18:21:14,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 18:21:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:14,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:14,499 INFO L554 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] [2021-06-05 18:21:14,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:14,725 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:14,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-05 18:21:14,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:14,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147173500] [2021-06-05 18:21:14,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:14,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:14,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147173500] [2021-06-05 18:21:14,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147173500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:14,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18087065] [2021-06-05 18:21:14,911 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 [2021-06-05 18:21:14,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:21:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:14,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18087065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:15,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:15,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:15,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534387497] [2021-06-05 18:21:15,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:15,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:15,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:15,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:15,112 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:15,581 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 18:21:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:15,585 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 18:21:15,585 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 18:21:15,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:15,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 18:21:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 18:21:15,614 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) [2021-06-05 18:21:15,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 18:21:15,618 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 18:21:15,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:15,618 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 18:21:15,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:15,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 18:21:15,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:15,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:15,620 INFO L554 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] [2021-06-05 18:21:15,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:21:15,821 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:15,821 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-05 18:21:15,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:15,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365938008] [2021-06-05 18:21:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:16,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365938008] [2021-06-05 18:21:16,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365938008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:16,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802438549] [2021-06-05 18:21:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:21:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:16,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:16,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:16,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802438549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:16,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:16,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:16,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569175780] [2021-06-05 18:21:16,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:16,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:16,254 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:16,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:16,857 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 18:21:16,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:16,857 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 [2021-06-05 18:21:16,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:16,861 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:21:16,861 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:21:16,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:21:16,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 18:21:16,893 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) [2021-06-05 18:21:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 18:21:16,897 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 18:21:16,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:16,897 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 18:21:16,897 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) [2021-06-05 18:21:16,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 18:21:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:16,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:16,899 INFO L554 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] [2021-06-05 18:21:17,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:21:17,100 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:17,100 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-05 18:21:17,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:17,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414972392] [2021-06-05 18:21:17,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414972392] [2021-06-05 18:21:17,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414972392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248546901] [2021-06-05 18:21:17,258 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 [2021-06-05 18:21:17,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:17,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:17,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248546901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:17,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:17,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:17,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519091341] [2021-06-05 18:21:17,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:17,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:17,471 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:17,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:17,982 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 18:21:17,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:21:17,983 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:17,987 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 18:21:17,988 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:21:17,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 493.6ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:21:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 18:21:18,026 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) [2021-06-05 18:21:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 18:21:18,031 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 18:21:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:18,031 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 18:21:18,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 18:21:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:18,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:18,034 INFO L554 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] [2021-06-05 18:21:18,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:18,237 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:18,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:18,237 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-05 18:21:18,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:18,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83119459] [2021-06-05 18:21:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:18,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:18,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83119459] [2021-06-05 18:21:18,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83119459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:18,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141387700] [2021-06-05 18:21:18,407 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 [2021-06-05 18:21:18,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:21:18,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:18,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141387700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:18,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:18,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:18,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794594121] [2021-06-05 18:21:18,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:18,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:18,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:18,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:18,648 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:19,261 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 18:21:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:21:19,261 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 [2021-06-05 18:21:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:19,265 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:21:19,265 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:21:19,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:21:19,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 18:21:19,293 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) [2021-06-05 18:21:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 18:21:19,297 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 18:21:19,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:19,297 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 18:21:19,297 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) [2021-06-05 18:21:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 18:21:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:19,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:19,300 INFO L554 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] [2021-06-05 18:21:19,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 18:21:19,500 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:19,500 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-05 18:21:19,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:19,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717695088] [2021-06-05 18:21:19,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:19,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:19,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717695088] [2021-06-05 18:21:19,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717695088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138898188] [2021-06-05 18:21:19,656 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 [2021-06-05 18:21:19,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:19,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:19,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:19,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:19,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138898188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:19,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:19,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:19,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417712262] [2021-06-05 18:21:19,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:19,848 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:20,388 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 18:21:20,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:21:20,388 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:20,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:20,393 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:21:20,393 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:21:20,394 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:21:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 18:21:20,433 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) [2021-06-05 18:21:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 18:21:20,438 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 18:21:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:20,438 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 18:21:20,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 18:21:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:20,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:20,442 INFO L554 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] [2021-06-05 18:21:20,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:20,642 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:20,642 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-05 18:21:20,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:20,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937454739] [2021-06-05 18:21:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:20,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:20,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937454739] [2021-06-05 18:21:20,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937454739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:20,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349381107] [2021-06-05 18:21:20,810 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 [2021-06-05 18:21:20,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:21:20,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:20,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:20,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:21,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349381107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:21,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:21,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448212021] [2021-06-05 18:21:21,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:21,037 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:21,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:21,711 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 18:21:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:21:21,712 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 [2021-06-05 18:21:21,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:21,716 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:21:21,716 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:21:21,716 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 647.7ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:21:21,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:21:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 18:21:21,750 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) [2021-06-05 18:21:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 18:21:21,755 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 18:21:21,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:21,755 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 18:21:21,755 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) [2021-06-05 18:21:21,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 18:21:21,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:21,757 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:21,758 INFO L554 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] [2021-06-05 18:21:21,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:21,958 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:21,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-05 18:21:21,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:21,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470109816] [2021-06-05 18:21:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:22,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470109816] [2021-06-05 18:21:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470109816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022569242] [2021-06-05 18:21:22,116 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 [2021-06-05 18:21:22,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:21:22,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:22,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:22,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:22,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022569242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:22,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:22,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:22,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350548319] [2021-06-05 18:21:22,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:22,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:22,313 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:22,882 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 18:21:22,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:21:22,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:22,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:22,887 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 18:21:22,887 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 18:21:22,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:21:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 18:21:22,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 18:21:22,920 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) [2021-06-05 18:21:22,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 18:21:22,924 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 18:21:22,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:22,924 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 18:21:22,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:22,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 18:21:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:22,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:22,927 INFO L554 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] [2021-06-05 18:21:23,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:23,128 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-05 18:21:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:23,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297053877] [2021-06-05 18:21:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:23,283 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:23,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:23,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297053877] [2021-06-05 18:21:23,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297053877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:23,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157591345] [2021-06-05 18:21:23,283 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 [2021-06-05 18:21:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:23,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:23,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157591345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:21:23,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964411925] [2021-06-05 18:21:23,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:21:23,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:21:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:21:23,522 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:24,298 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 18:21:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:21:24,298 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 [2021-06-05 18:21:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:24,303 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 18:21:24,304 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:21:24,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 712.5ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:21:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:21:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 18:21:24,336 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) [2021-06-05 18:21:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 18:21:24,340 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 18:21:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:24,340 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 18:21:24,340 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) [2021-06-05 18:21:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 18:21:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:24,343 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:24,343 INFO L554 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] [2021-06-05 18:21:24,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:24,544 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:24,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-05 18:21:24,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:24,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474958946] [2021-06-05 18:21:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:24,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:24,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474958946] [2021-06-05 18:21:24,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474958946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:24,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361633877] [2021-06-05 18:21:24,695 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 [2021-06-05 18:21:24,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:24,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:24,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:24,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361633877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:24,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:24,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:21:24,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43464554] [2021-06-05 18:21:24,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:21:24,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:24,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:21:24,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:21:24,910 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:25,559 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 18:21:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:21:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:21:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:25,565 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 18:21:25,565 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 18:21:25,566 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 596.5ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:21:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 18:21:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 18:21:25,603 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) [2021-06-05 18:21:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 18:21:25,608 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 18:21:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:25,608 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 18:21:25,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 18:21:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:21:25,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:25,611 INFO L554 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] [2021-06-05 18:21:25,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 18:21:25,811 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:25,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:25,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-05 18:21:25,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:25,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299638282] [2021-06-05 18:21:25,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:25,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:25,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299638282] [2021-06-05 18:21:25,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299638282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:25,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105913289] [2021-06-05 18:21:25,969 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 [2021-06-05 18:21:26,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:21:26,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:26,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:21:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:26,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105913289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:26,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:26,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:21:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162945503] [2021-06-05 18:21:26,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:26,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:26,217 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) [2021-06-05 18:21:27,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:27,025 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-05 18:21:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:21:27,026 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 [2021-06-05 18:21:27,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:27,030 INFO L225 Difference]: With dead ends: 5216 [2021-06-05 18:21:27,031 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 18:21:27,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 769.4ms TimeCoverageRelationStatistics Valid=1100, Invalid=3060, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:21:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 18:21:27,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-05 18:21:27,055 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) [2021-06-05 18:21:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-05 18:21:27,058 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-05 18:21:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:27,058 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-05 18:21:27,058 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) [2021-06-05 18:21:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-05 18:21:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:27,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:27,060 INFO L554 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] [2021-06-05 18:21:27,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 18:21:27,261 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-05 18:21:27,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:27,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64756118] [2021-06-05 18:21:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64756118] [2021-06-05 18:21:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64756118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019272428] [2021-06-05 18:21:27,469 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 [2021-06-05 18:21:27,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:27,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:27,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:27,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:27,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019272428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:27,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:27,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-06-05 18:21:27,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926603265] [2021-06-05 18:21:27,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:21:27,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:27,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:21:27,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:21:27,738 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:28,171 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-05 18:21:28,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:28,175 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 18:21:28,175 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 18:21:28,175 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:28,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 18:21:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-05 18:21:28,197 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) [2021-06-05 18:21:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-05 18:21:28,200 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-05 18:21:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:28,200 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-05 18:21:28,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-05 18:21:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:28,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:28,202 INFO L554 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] [2021-06-05 18:21:28,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:21:28,403 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:28,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-05 18:21:28,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:28,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838086658] [2021-06-05 18:21:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:28,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:28,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838086658] [2021-06-05 18:21:28,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838086658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:28,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818611009] [2021-06-05 18:21:28,612 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 [2021-06-05 18:21:28,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:28,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:28,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818611009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:28,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:28,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:28,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707818696] [2021-06-05 18:21:28,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:28,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:28,857 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:29,205 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-05 18:21:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:21:29,205 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 [2021-06-05 18:21:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:29,210 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 18:21:29,210 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 18:21:29,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:21:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 18:21:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-05 18:21:29,237 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) [2021-06-05 18:21:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-05 18:21:29,240 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-05 18:21:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:29,240 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-05 18:21:29,240 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) [2021-06-05 18:21:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-05 18:21:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:29,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:29,242 INFO L554 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] [2021-06-05 18:21:29,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 18:21:29,443 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:29,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:29,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-05 18:21:29,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:29,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104971243] [2021-06-05 18:21:29,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:29,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104971243] [2021-06-05 18:21:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104971243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65284501] [2021-06-05 18:21:29,659 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 [2021-06-05 18:21:29,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:29,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65284501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:29,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:29,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:29,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838354093] [2021-06-05 18:21:29,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:29,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:29,903 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:30,329 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-05 18:21:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:30,334 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:21:30,334 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:21:30,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:21:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-05 18:21:30,367 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) [2021-06-05 18:21:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-05 18:21:30,370 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-05 18:21:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:30,371 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-05 18:21:30,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:30,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-05 18:21:30,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:30,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:30,373 INFO L554 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] [2021-06-05 18:21:30,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:21:30,574 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:30,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:30,574 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-05 18:21:30,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:30,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735097079] [2021-06-05 18:21:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:30,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:30,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735097079] [2021-06-05 18:21:30,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735097079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:30,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111980305] [2021-06-05 18:21:30,805 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 [2021-06-05 18:21:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:31,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111980305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:31,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:31,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231630199] [2021-06-05 18:21:31,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:31,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:31,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:31,069 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:31,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:31,476 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-05 18:21:31,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:21:31,476 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 [2021-06-05 18:21:31,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:31,480 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:21:31,480 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:21:31,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:21:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:21:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-05 18:21:31,504 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) [2021-06-05 18:21:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-05 18:21:31,507 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-05 18:21:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:31,507 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-05 18:21:31,507 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) [2021-06-05 18:21:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-05 18:21:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:31,509 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:31,509 INFO L554 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] [2021-06-05 18:21:31,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 18:21:31,710 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-05 18:21:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:31,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654368584] [2021-06-05 18:21:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:31,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654368584] [2021-06-05 18:21:31,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654368584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:31,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132582238] [2021-06-05 18:21:31,918 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 [2021-06-05 18:21:31,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:31,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:31,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:31,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:32,156 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:32,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132582238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:32,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:32,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:32,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059101341] [2021-06-05 18:21:32,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:32,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:32,158 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:32,640 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-05 18:21:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:21:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:32,645 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:21:32,645 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:21:32,645 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 548.7ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:32,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:21:32,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-05 18:21:32,672 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) [2021-06-05 18:21:32,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-05 18:21:32,675 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-05 18:21:32,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:32,675 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-05 18:21:32,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-05 18:21:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:32,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:32,677 INFO L554 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] [2021-06-05 18:21:32,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:32,878 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-05 18:21:32,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:32,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752510494] [2021-06-05 18:21:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:33,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:33,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752510494] [2021-06-05 18:21:33,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752510494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:33,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061693527] [2021-06-05 18:21:33,065 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 [2021-06-05 18:21:33,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:21:33,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:33,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061693527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:33,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:33,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:33,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642413719] [2021-06-05 18:21:33,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:33,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:33,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:33,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:33,289 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:33,742 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-05 18:21:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:21:33,742 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 [2021-06-05 18:21:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:33,747 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:21:33,747 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:21:33,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:21:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:21:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-05 18:21:33,781 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) [2021-06-05 18:21:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-05 18:21:33,785 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-05 18:21:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:33,785 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-05 18:21:33,785 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) [2021-06-05 18:21:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-05 18:21:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:33,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:33,788 INFO L554 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] [2021-06-05 18:21:33,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:33,990 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-05 18:21:33,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:33,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449260708] [2021-06-05 18:21:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:34,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449260708] [2021-06-05 18:21:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449260708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489911282] [2021-06-05 18:21:34,205 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 [2021-06-05 18:21:34,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:34,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:34,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489911282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:34,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:34,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:34,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729765960] [2021-06-05 18:21:34,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:34,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:34,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:34,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:34,444 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:34,978 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-05 18:21:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:34,982 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 18:21:34,983 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 18:21:34,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 580.5ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:34,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 18:21:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-05 18:21:35,011 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) [2021-06-05 18:21:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-05 18:21:35,014 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-05 18:21:35,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:35,014 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-05 18:21:35,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:35,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-05 18:21:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:35,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:35,017 INFO L554 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] [2021-06-05 18:21:35,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:35,217 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:35,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-05 18:21:35,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:35,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930831132] [2021-06-05 18:21:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:35,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:35,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930831132] [2021-06-05 18:21:35,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930831132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462322758] [2021-06-05 18:21:35,434 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 [2021-06-05 18:21:35,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:35,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:35,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:35,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462322758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:35,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:35,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125612103] [2021-06-05 18:21:35,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:35,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:35,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:35,694 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:36,169 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-05 18:21:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:36,169 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 [2021-06-05 18:21:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:36,174 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:21:36,174 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:21:36,174 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:21:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-05 18:21:36,207 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) [2021-06-05 18:21:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-05 18:21:36,211 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-05 18:21:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:36,211 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-05 18:21:36,211 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) [2021-06-05 18:21:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-05 18:21:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:36,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:36,213 INFO L554 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] [2021-06-05 18:21:36,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:36,414 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-05 18:21:36,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:36,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997151986] [2021-06-05 18:21:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:36,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997151986] [2021-06-05 18:21:36,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997151986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:36,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232565990] [2021-06-05 18:21:36,662 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 [2021-06-05 18:21:36,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:36,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:36,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:36,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:36,958 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:36,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232565990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:36,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:36,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:36,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696991347] [2021-06-05 18:21:36,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:36,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:36,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:36,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:36,959 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:37,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:37,589 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-05 18:21:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:37,593 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 18:21:37,593 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 18:21:37,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 680.2ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 18:21:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-05 18:21:37,623 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) [2021-06-05 18:21:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-05 18:21:37,627 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-05 18:21:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:37,628 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-05 18:21:37,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-05 18:21:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:37,630 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:37,630 INFO L554 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] [2021-06-05 18:21:37,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:37,830 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-05 18:21:37,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:37,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116655653] [2021-06-05 18:21:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:38,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:38,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116655653] [2021-06-05 18:21:38,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116655653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950551372] [2021-06-05 18:21:38,004 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 [2021-06-05 18:21:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:38,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:38,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950551372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:38,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:38,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759116816] [2021-06-05 18:21:38,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:38,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:38,224 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:38,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:38,753 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-05 18:21:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:38,753 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 [2021-06-05 18:21:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:38,758 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:21:38,758 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:21:38,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:21:38,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-05 18:21:38,789 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) [2021-06-05 18:21:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-05 18:21:38,793 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-05 18:21:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:38,793 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-05 18:21:38,793 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) [2021-06-05 18:21:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-05 18:21:38,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:38,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:38,795 INFO L554 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] [2021-06-05 18:21:38,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:38,995 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:38,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:38,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-05 18:21:38,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:38,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086836574] [2021-06-05 18:21:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:39,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:39,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086836574] [2021-06-05 18:21:39,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086836574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:39,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046898864] [2021-06-05 18:21:39,178 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 [2021-06-05 18:21:39,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:39,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:39,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:39,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046898864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:39,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:39,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:39,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412772086] [2021-06-05 18:21:39,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:39,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:39,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:39,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:39,424 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:40,070 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-05 18:21:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:21:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:40,075 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 18:21:40,075 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 18:21:40,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 657.5ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:21:40,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 18:21:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-05 18:21:40,110 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) [2021-06-05 18:21:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-05 18:21:40,114 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-05 18:21:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:40,114 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-05 18:21:40,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-05 18:21:40,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:40,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:40,117 INFO L554 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] [2021-06-05 18:21:40,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:40,321 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-05 18:21:40,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:40,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725473994] [2021-06-05 18:21:40,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:40,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:40,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725473994] [2021-06-05 18:21:40,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725473994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:40,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106421796] [2021-06-05 18:21:40,495 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 [2021-06-05 18:21:40,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:21:40,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:40,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:40,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106421796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:40,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:40,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:40,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606399674] [2021-06-05 18:21:40,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:40,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:40,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:40,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:40,718 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:41,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:41,302 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-05 18:21:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:21:41,302 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 [2021-06-05 18:21:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:41,307 INFO L225 Difference]: With dead ends: 4646 [2021-06-05 18:21:41,307 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 18:21:41,307 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 18:21:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-05 18:21:41,361 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) [2021-06-05 18:21:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-05 18:21:41,366 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-05 18:21:41,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:41,366 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-05 18:21:41,366 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) [2021-06-05 18:21:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-05 18:21:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:41,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:41,369 INFO L554 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] [2021-06-05 18:21:41,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 18:21:41,570 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-05 18:21:41,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:41,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392113060] [2021-06-05 18:21:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:41,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392113060] [2021-06-05 18:21:41,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392113060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881894628] [2021-06-05 18:21:41,744 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 [2021-06-05 18:21:41,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:41,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:41,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881894628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:41,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:41,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818071849] [2021-06-05 18:21:41,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:41,995 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:42,731 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-05 18:21:42,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:21:42,732 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:42,737 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 18:21:42,737 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 18:21:42,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:21:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 18:21:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-05 18:21:42,780 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) [2021-06-05 18:21:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-05 18:21:42,786 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-05 18:21:42,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:42,786 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-05 18:21:42,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:42,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-05 18:21:42,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:42,789 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:42,789 INFO L554 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] [2021-06-05 18:21:42,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 18:21:42,990 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:42,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:42,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-05 18:21:42,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:42,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519023285] [2021-06-05 18:21:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:43,171 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:43,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519023285] [2021-06-05 18:21:43,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519023285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802679494] [2021-06-05 18:21:43,172 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 [2021-06-05 18:21:43,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802679494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:43,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:43,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:43,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801216722] [2021-06-05 18:21:43,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:43,402 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:44,009 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-05 18:21:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:21:44,009 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 [2021-06-05 18:21:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:44,014 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 18:21:44,014 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 18:21:44,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 582.6ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:21:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 18:21:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-05 18:21:44,049 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) [2021-06-05 18:21:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-05 18:21:44,053 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-05 18:21:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:44,053 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-05 18:21:44,053 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) [2021-06-05 18:21:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-05 18:21:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:44,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:44,056 INFO L554 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] [2021-06-05 18:21:44,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 18:21:44,256 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-05 18:21:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:44,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807738749] [2021-06-05 18:21:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:44,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:44,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:44,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807738749] [2021-06-05 18:21:44,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807738749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:44,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001045838] [2021-06-05 18:21:44,462 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 [2021-06-05 18:21:44,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:44,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:44,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:44,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:44,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001045838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:44,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:44,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:44,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425605949] [2021-06-05 18:21:44,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:44,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:44,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:44,699 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:45,475 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-05 18:21:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:21:45,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:45,480 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:21:45,480 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:21:45,481 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:21:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:21:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-05 18:21:45,519 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) [2021-06-05 18:21:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-05 18:21:45,524 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-05 18:21:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:45,524 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-05 18:21:45,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-05 18:21:45,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:45,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:45,528 INFO L554 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] [2021-06-05 18:21:45,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:45,728 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-05 18:21:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:45,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68118466] [2021-06-05 18:21:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:45,892 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:45,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:45,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68118466] [2021-06-05 18:21:45,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68118466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:45,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516337274] [2021-06-05 18:21:45,892 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 [2021-06-05 18:21:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:45,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:46,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516337274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:46,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:46,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:46,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203162143] [2021-06-05 18:21:46,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:46,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:46,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:46,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:46,098 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:46,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:46,734 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-05 18:21:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:21:46,734 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 [2021-06-05 18:21:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:46,739 INFO L225 Difference]: With dead ends: 4791 [2021-06-05 18:21:46,739 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:21:46,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 600.4ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:21:46,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:21:46,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-05 18:21:46,791 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) [2021-06-05 18:21:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-05 18:21:46,796 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-05 18:21:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:46,796 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-05 18:21:46,796 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) [2021-06-05 18:21:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-05 18:21:46,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:46,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:46,799 INFO L554 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] [2021-06-05 18:21:46,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 18:21:46,999 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-05 18:21:47,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:47,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435750134] [2021-06-05 18:21:47,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:47,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:47,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435750134] [2021-06-05 18:21:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435750134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093677194] [2021-06-05 18:21:47,190 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 [2021-06-05 18:21:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:47,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:47,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:47,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093677194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:47,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:47,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:21:47,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874343630] [2021-06-05 18:21:47,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:47,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:47,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:47,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:47,455 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:48,317 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-05 18:21:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:21:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:21:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:48,322 INFO L225 Difference]: With dead ends: 5369 [2021-06-05 18:21:48,323 INFO L226 Difference]: Without dead ends: 4746 [2021-06-05 18:21:48,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:21:48,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-05 18:21:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-05 18:21:48,356 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) [2021-06-05 18:21:48,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-05 18:21:48,361 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-05 18:21:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:48,361 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-05 18:21:48,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:48,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-05 18:21:48,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:48,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:48,364 INFO L554 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] [2021-06-05 18:21:48,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:48,569 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:48,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:48,569 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-05 18:21:48,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:48,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980373257] [2021-06-05 18:21:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:48,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980373257] [2021-06-05 18:21:48,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980373257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081709021] [2021-06-05 18:21:48,737 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 [2021-06-05 18:21:48,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:21:48,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:48,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:48,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:48,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081709021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:48,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:48,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:48,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022481632] [2021-06-05 18:21:48,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:48,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:48,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:48,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:48,950 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:21:49,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:49,651 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-05 18:21:49,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:21:49,652 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 [2021-06-05 18:21:49,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:49,657 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 18:21:49,657 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 18:21:49,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:21:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 18:21:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-05 18:21:49,695 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) [2021-06-05 18:21:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-05 18:21:49,700 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-05 18:21:49,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:49,701 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-05 18:21:49,701 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) [2021-06-05 18:21:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-05 18:21:49,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:21:49,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:49,704 INFO L554 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] [2021-06-05 18:21:49,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:49,904 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-05 18:21:49,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:49,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284120477] [2021-06-05 18:21:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:50,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284120477] [2021-06-05 18:21:50,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284120477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:50,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280347763] [2021-06-05 18:21:50,074 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 [2021-06-05 18:21:50,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:50,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:50,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:21:50,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:50,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280347763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:50,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:50,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:21:50,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290617511] [2021-06-05 18:21:50,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:50,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:50,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:50,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:50,283 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) [2021-06-05 18:21:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:51,137 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-05 18:21:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:21:51,137 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 [2021-06-05 18:21:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:51,143 INFO L225 Difference]: With dead ends: 5085 [2021-06-05 18:21:51,143 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 18:21:51,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 810.2ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:21:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 18:21:51,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-05 18:21:51,170 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) [2021-06-05 18:21:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-05 18:21:51,172 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-05 18:21:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:51,173 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-05 18:21:51,173 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) [2021-06-05 18:21:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-05 18:21:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:51,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:51,174 INFO L554 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] [2021-06-05 18:21:51,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:51,375 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:51,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:51,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-05 18:21:51,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:51,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485141480] [2021-06-05 18:21:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:51,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:51,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485141480] [2021-06-05 18:21:51,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485141480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:51,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733827933] [2021-06-05 18:21:51,587 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 [2021-06-05 18:21:51,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:51,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:51,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:51,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:51,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733827933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:51,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:51,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:21:51,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566537810] [2021-06-05 18:21:51,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:51,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:51,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:51,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:51,802 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) [2021-06-05 18:21:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:52,208 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-05 18:21:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:21:52,209 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 [2021-06-05 18:21:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:52,212 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 18:21:52,212 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 18:21:52,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:21:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 18:21:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-05 18:21:52,234 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) [2021-06-05 18:21:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-05 18:21:52,237 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-05 18:21:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:52,237 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-05 18:21:52,237 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) [2021-06-05 18:21:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-05 18:21:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:52,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:52,239 INFO L554 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] [2021-06-05 18:21:52,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 18:21:52,439 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-05 18:21:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:52,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71073321] [2021-06-05 18:21:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:52,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:52,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71073321] [2021-06-05 18:21:52,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71073321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:52,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357868246] [2021-06-05 18:21:52,663 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 [2021-06-05 18:21:52,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:52,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:52,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:52,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:52,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357868246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:52,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:52,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:21:52,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826953371] [2021-06-05 18:21:52,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:52,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:52,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:52,899 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) [2021-06-05 18:21:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:53,364 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-05 18:21:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:21:53,364 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 [2021-06-05 18:21:53,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:53,368 INFO L225 Difference]: With dead ends: 4501 [2021-06-05 18:21:53,368 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 18:21:53,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:53,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 18:21:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-05 18:21:53,394 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) [2021-06-05 18:21:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-05 18:21:53,398 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-05 18:21:53,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:53,398 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-05 18:21:53,398 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) [2021-06-05 18:21:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-05 18:21:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:53,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:53,400 INFO L554 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] [2021-06-05 18:21:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:53,600 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-05 18:21:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939723883] [2021-06-05 18:21:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:53,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:53,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939723883] [2021-06-05 18:21:53,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939723883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:53,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505638029] [2021-06-05 18:21:53,804 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 [2021-06-05 18:21:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:53,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:54,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505638029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:54,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:54,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:21:54,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985762769] [2021-06-05 18:21:54,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:54,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:54,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:54,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:54,016 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) [2021-06-05 18:21:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:54,457 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-05 18:21:54,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:21:54,457 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 [2021-06-05 18:21:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:54,461 INFO L225 Difference]: With dead ends: 4531 [2021-06-05 18:21:54,461 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 18:21:54,462 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:21:54,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 18:21:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-05 18:21:54,504 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) [2021-06-05 18:21:54,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-05 18:21:54,507 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-05 18:21:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:54,507 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-05 18:21:54,507 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) [2021-06-05 18:21:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-05 18:21:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:54,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:54,510 INFO L554 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] [2021-06-05 18:21:54,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 18:21:54,715 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:54,716 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-05 18:21:54,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:54,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860964476] [2021-06-05 18:21:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:54,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:54,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860964476] [2021-06-05 18:21:54,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860964476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:54,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391801952] [2021-06-05 18:21:54,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:21:54,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:21:54,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:54,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:54,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391801952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:55,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:55,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:21:55,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831729056] [2021-06-05 18:21:55,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:55,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:55,156 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) [2021-06-05 18:21:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:55,674 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-05 18:21:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:21:55,674 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 [2021-06-05 18:21:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:55,679 INFO L225 Difference]: With dead ends: 4556 [2021-06-05 18:21:55,679 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 18:21:55,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 18:21:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-05 18:21:55,708 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) [2021-06-05 18:21:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-05 18:21:55,711 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-05 18:21:55,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:55,711 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-05 18:21:55,712 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) [2021-06-05 18:21:55,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-05 18:21:55,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:55,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:55,714 INFO L554 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] [2021-06-05 18:21:55,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 18:21:55,914 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:55,915 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-05 18:21:55,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:55,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239536343] [2021-06-05 18:21:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:56,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:56,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239536343] [2021-06-05 18:21:56,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239536343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153508728] [2021-06-05 18:21:56,120 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 [2021-06-05 18:21:56,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:21:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:56,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:56,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:56,343 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153508728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:21:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582984125] [2021-06-05 18:21:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:56,344 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) [2021-06-05 18:21:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:56,833 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-05 18:21:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:21:56,834 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 [2021-06-05 18:21:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:56,838 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 18:21:56,838 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 18:21:56,839 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 520.8ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:21:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 18:21:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-05 18:21:56,875 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) [2021-06-05 18:21:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-05 18:21:56,879 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-05 18:21:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:56,880 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-05 18:21:56,880 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) [2021-06-05 18:21:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-05 18:21:56,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:56,882 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:56,882 INFO L554 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] [2021-06-05 18:21:57,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 18:21:57,083 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:57,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-05 18:21:57,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:57,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34101708] [2021-06-05 18:21:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:57,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:57,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34101708] [2021-06-05 18:21:57,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34101708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:57,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183541261] [2021-06-05 18:21:57,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:21:57,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:21:57,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:57,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:57,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183541261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:57,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:57,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:21:57,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73551200] [2021-06-05 18:21:57,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:21:57,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:57,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:21:57,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:21:57,608 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) [2021-06-05 18:21:58,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:58,207 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-05 18:21:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:21:58,207 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 [2021-06-05 18:21:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:58,212 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 18:21:58,212 INFO L226 Difference]: Without dead ends: 4336 [2021-06-05 18:21:58,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 670.7ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:58,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-05 18:21:58,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-05 18:21:58,254 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) [2021-06-05 18:21:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-05 18:21:58,259 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-05 18:21:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:58,259 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-05 18:21:58,260 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) [2021-06-05 18:21:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-05 18:21:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:58,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:58,263 INFO L554 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] [2021-06-05 18:21:58,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 18:21:58,477 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:58,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:58,477 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-05 18:21:58,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:58,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566193217] [2021-06-05 18:21:58,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:58,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:58,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566193217] [2021-06-05 18:21:58,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566193217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:58,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214893892] [2021-06-05 18:21:58,666 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 [2021-06-05 18:21:58,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:21:58,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:58,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:21:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214893892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:58,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:21:58,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:21:58,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26951795] [2021-06-05 18:21:58,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:21:58,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:21:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:21:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:21:58,882 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) [2021-06-05 18:21:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:21:59,414 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-05 18:21:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:21:59,415 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 [2021-06-05 18:21:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:21:59,419 INFO L225 Difference]: With dead ends: 4631 [2021-06-05 18:21:59,419 INFO L226 Difference]: Without dead ends: 4361 [2021-06-05 18:21:59,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 533.9ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:21:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-05 18:21:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-05 18:21:59,450 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) [2021-06-05 18:21:59,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-05 18:21:59,453 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-05 18:21:59,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:21:59,454 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-05 18:21:59,454 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) [2021-06-05 18:21:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-05 18:21:59,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:21:59,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:21:59,456 INFO L554 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] [2021-06-05 18:21:59,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:21:59,657 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:21:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:21:59,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-05 18:21:59,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:21:59,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272013276] [2021-06-05 18:21:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:21:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:21:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:21:59,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:21:59,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272013276] [2021-06-05 18:21:59,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272013276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:21:59,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002529235] [2021-06-05 18:21:59,884 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 [2021-06-05 18:21:59,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:21:59,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:21:59,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:21:59,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:00,110 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:00,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002529235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:00,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:00,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:00,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161558316] [2021-06-05 18:22:00,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:00,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:00,111 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) [2021-06-05 18:22:00,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:00,745 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-05 18:22:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:00,745 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 [2021-06-05 18:22:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:00,750 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 18:22:00,750 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 18:22:00,751 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:22:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 18:22:00,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-05 18:22:00,789 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) [2021-06-05 18:22:00,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-05 18:22:00,794 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-05 18:22:00,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:00,794 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-05 18:22:00,794 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) [2021-06-05 18:22:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-05 18:22:00,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:00,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:00,797 INFO L554 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] [2021-06-05 18:22:00,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 18:22:00,997 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:00,998 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-05 18:22:00,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:00,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163016282] [2021-06-05 18:22:00,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:01,180 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:01,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163016282] [2021-06-05 18:22:01,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163016282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:01,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542983927] [2021-06-05 18:22:01,180 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 [2021-06-05 18:22:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:01,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:01,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:01,387 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:01,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542983927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:01,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:01,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:22:01,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246848160] [2021-06-05 18:22:01,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:01,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:01,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:01,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:01,388 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) [2021-06-05 18:22:01,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:01,950 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-05 18:22:01,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:01,951 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 [2021-06-05 18:22:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:01,955 INFO L225 Difference]: With dead ends: 4681 [2021-06-05 18:22:01,955 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 18:22:01,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 555.4ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:22:01,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 18:22:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-05 18:22:01,986 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) [2021-06-05 18:22:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-05 18:22:01,990 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-05 18:22:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:01,990 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-05 18:22:01,991 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) [2021-06-05 18:22:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-05 18:22:01,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:01,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:01,993 INFO L554 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] [2021-06-05 18:22:02,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:02,193 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:02,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:02,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-05 18:22:02,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:02,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612647104] [2021-06-05 18:22:02,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:02,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612647104] [2021-06-05 18:22:02,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612647104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305248341] [2021-06-05 18:22:02,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:22:02,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:02,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305248341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:02,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:02,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635716413] [2021-06-05 18:22:02,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:02,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:02,646 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) [2021-06-05 18:22:03,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:03,325 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-05 18:22:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:22:03,325 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 [2021-06-05 18:22:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:03,330 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 18:22:03,330 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 18:22:03,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 714.2ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:22:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 18:22:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-05 18:22:03,362 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) [2021-06-05 18:22:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-05 18:22:03,366 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-05 18:22:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:03,366 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-05 18:22:03,366 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) [2021-06-05 18:22:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-05 18:22:03,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:03,369 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:03,369 INFO L554 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] [2021-06-05 18:22:03,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:03,569 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-05 18:22:03,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:03,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374740034] [2021-06-05 18:22:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:03,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:03,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374740034] [2021-06-05 18:22:03,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374740034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:03,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774425839] [2021-06-05 18:22:03,769 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 [2021-06-05 18:22:03,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:22:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:03,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:04,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774425839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:04,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:04,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:22:04,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765292062] [2021-06-05 18:22:04,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:04,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:04,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:04,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:04,018 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) [2021-06-05 18:22:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:04,635 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-05 18:22:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:22:04,635 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 [2021-06-05 18:22:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:04,640 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 18:22:04,640 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 18:22:04,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:22:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 18:22:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-05 18:22:04,681 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) [2021-06-05 18:22:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-05 18:22:04,687 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-05 18:22:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:04,687 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-05 18:22:04,687 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) [2021-06-05 18:22:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-05 18:22:04,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:04,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:04,690 INFO L554 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] [2021-06-05 18:22:04,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:04,891 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:04,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:04,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-05 18:22:04,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:04,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149992213] [2021-06-05 18:22:04,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:05,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149992213] [2021-06-05 18:22:05,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149992213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:05,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171618779] [2021-06-05 18:22:05,131 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 [2021-06-05 18:22:05,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:05,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:05,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:05,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:05,397 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:05,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171618779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:05,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:05,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:05,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60585243] [2021-06-05 18:22:05,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:05,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:05,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:05,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:05,399 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) [2021-06-05 18:22:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:06,152 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-05 18:22:06,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:22:06,153 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 [2021-06-05 18:22:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:06,157 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 18:22:06,157 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 18:22:06,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 749.1ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:22:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 18:22:06,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-05 18:22:06,193 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) [2021-06-05 18:22:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-05 18:22:06,197 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-05 18:22:06,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:06,197 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-05 18:22:06,197 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) [2021-06-05 18:22:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-05 18:22:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:06,200 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:06,200 INFO L554 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] [2021-06-05 18:22:06,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:06,400 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-05 18:22:06,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:06,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835180770] [2021-06-05 18:22:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:06,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:06,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835180770] [2021-06-05 18:22:06,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835180770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:06,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547840587] [2021-06-05 18:22:06,583 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 [2021-06-05 18:22:06,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:22:06,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:06,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:06,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547840587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:06,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:06,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:22:06,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778970330] [2021-06-05 18:22:06,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:06,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:06,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:06,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:06,791 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) [2021-06-05 18:22:07,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:07,439 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-05 18:22:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:22:07,439 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 [2021-06-05 18:22:07,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:07,444 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 18:22:07,444 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 18:22:07,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:22:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 18:22:07,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-05 18:22:07,495 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) [2021-06-05 18:22:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-05 18:22:07,501 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-05 18:22:07,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:07,501 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-05 18:22:07,501 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) [2021-06-05 18:22:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-05 18:22:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:07,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:07,504 INFO L554 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] [2021-06-05 18:22:07,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 18:22:07,704 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:07,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-05 18:22:07,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:07,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266030205] [2021-06-05 18:22:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:07,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:07,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266030205] [2021-06-05 18:22:07,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266030205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:07,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186895936] [2021-06-05 18:22:07,891 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 [2021-06-05 18:22:07,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:22:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:08,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186895936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:08,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:08,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:08,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262538903] [2021-06-05 18:22:08,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:08,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:08,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:08,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:08,121 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) [2021-06-05 18:22:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:08,924 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-05 18:22:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:22:08,924 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 [2021-06-05 18:22:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:08,929 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 18:22:08,929 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 18:22:08,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 761.1ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:22:08,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 18:22:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-05 18:22:08,976 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) [2021-06-05 18:22:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-05 18:22:08,983 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-05 18:22:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:08,983 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-05 18:22:08,983 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) [2021-06-05 18:22:08,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-05 18:22:08,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:08,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:08,987 INFO L554 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] [2021-06-05 18:22:09,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 18:22:09,188 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-05 18:22:09,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:09,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653282556] [2021-06-05 18:22:09,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:09,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:09,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653282556] [2021-06-05 18:22:09,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653282556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:09,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087754435] [2021-06-05 18:22:09,372 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 [2021-06-05 18:22:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:09,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087754435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:09,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:09,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:22:09,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475629483] [2021-06-05 18:22:09,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:09,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:09,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:09,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:09,575 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) [2021-06-05 18:22:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:10,265 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-05 18:22:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:22:10,265 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 [2021-06-05 18:22:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:10,269 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 18:22:10,269 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 18:22:10,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:22:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 18:22:10,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-05 18:22:10,308 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) [2021-06-05 18:22:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-05 18:22:10,313 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-05 18:22:10,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:10,313 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-05 18:22:10,313 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) [2021-06-05 18:22:10,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-05 18:22:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:10,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:10,316 INFO L554 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] [2021-06-05 18:22:10,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 18:22:10,517 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-05 18:22:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:10,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949484385] [2021-06-05 18:22:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:10,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949484385] [2021-06-05 18:22:10,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949484385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:10,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021574190] [2021-06-05 18:22:10,697 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 [2021-06-05 18:22:10,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:10,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:10,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:10,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:10,916 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:10,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021574190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:10,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:10,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:10,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434605867] [2021-06-05 18:22:10,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:10,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:10,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:10,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:10,917 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) [2021-06-05 18:22:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:11,772 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-05 18:22:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:22:11,772 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 [2021-06-05 18:22:11,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:11,777 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 18:22:11,777 INFO L226 Difference]: Without dead ends: 4646 [2021-06-05 18:22:11,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 808.6ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:22:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-05 18:22:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-05 18:22:11,816 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) [2021-06-05 18:22:11,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-05 18:22:11,821 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-05 18:22:11,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:11,821 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-05 18:22:11,821 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) [2021-06-05 18:22:11,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-05 18:22:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:11,824 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:11,824 INFO L554 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] [2021-06-05 18:22:12,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:12,029 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:12,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:12,029 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-05 18:22:12,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:12,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452824041] [2021-06-05 18:22:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:12,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452824041] [2021-06-05 18:22:12,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452824041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:12,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163847169] [2021-06-05 18:22:12,207 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 [2021-06-05 18:22:12,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:22:12,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:12,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:12,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:12,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163847169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:12,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:12,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:22:12,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181697398] [2021-06-05 18:22:12,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:22:12,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:22:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:22:12,415 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) [2021-06-05 18:22:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:13,137 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-05 18:22:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:22:13,137 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 [2021-06-05 18:22:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:13,142 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 18:22:13,142 INFO L226 Difference]: Without dead ends: 5388 [2021-06-05 18:22:13,143 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 682.6ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:22:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-05 18:22:13,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-05 18:22:13,181 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) [2021-06-05 18:22:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-05 18:22:13,187 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-05 18:22:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:13,187 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-05 18:22:13,187 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) [2021-06-05 18:22:13,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-05 18:22:13,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:22:13,191 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:13,191 INFO L554 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] [2021-06-05 18:22:13,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:13,393 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-05 18:22:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:13,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680804856] [2021-06-05 18:22:13,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:13,569 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:13,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:13,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680804856] [2021-06-05 18:22:13,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680804856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:13,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153797511] [2021-06-05 18:22:13,570 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 [2021-06-05 18:22:13,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:22:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:13,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153797511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:13,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:13,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:22:13,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354586967] [2021-06-05 18:22:13,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:13,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:13,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:13,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:13,783 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) [2021-06-05 18:22:14,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:14,629 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-05 18:22:14,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:22:14,630 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 [2021-06-05 18:22:14,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:14,635 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 18:22:14,635 INFO L226 Difference]: Without dead ends: 4631 [2021-06-05 18:22:14,635 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 814.0ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:22:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-05 18:22:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-05 18:22:14,660 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) [2021-06-05 18:22:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-05 18:22:14,663 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-05 18:22:14,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:14,663 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-05 18:22:14,663 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) [2021-06-05 18:22:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-05 18:22:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:14,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:14,665 INFO L554 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] [2021-06-05 18:22:14,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:14,865 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-05 18:22:14,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:14,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776524029] [2021-06-05 18:22:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:15,136 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:15,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:15,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776524029] [2021-06-05 18:22:15,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776524029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:15,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33041228] [2021-06-05 18:22:15,137 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 [2021-06-05 18:22:15,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:15,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:15,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:15,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:15,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33041228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:15,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:15,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:22:15,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115987457] [2021-06-05 18:22:15,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:22:15,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:15,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:22:15,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:22:15,480 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) [2021-06-05 18:22:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:15,963 INFO L93 Difference]: Finished difference Result 3774 states and 9816 transitions. [2021-06-05 18:22:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:15,964 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 [2021-06-05 18:22:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:15,967 INFO L225 Difference]: With dead ends: 3774 [2021-06-05 18:22:15,967 INFO L226 Difference]: Without dead ends: 3440 [2021-06-05 18:22:15,967 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=760, Invalid=2102, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-06-05 18:22:15,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2719. [2021-06-05 18:22:15,989 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) [2021-06-05 18:22:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 7386 transitions. [2021-06-05 18:22:15,992 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 7386 transitions. Word has length 130 [2021-06-05 18:22:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:15,992 INFO L482 AbstractCegarLoop]: Abstraction has 2719 states and 7386 transitions. [2021-06-05 18:22:15,992 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) [2021-06-05 18:22:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 7386 transitions. [2021-06-05 18:22:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:15,994 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:15,994 INFO L554 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] [2021-06-05 18:22:16,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:16,195 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-05 18:22:16,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:16,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483221821] [2021-06-05 18:22:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:16,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483221821] [2021-06-05 18:22:16,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483221821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:16,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135937907] [2021-06-05 18:22:16,433 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 [2021-06-05 18:22:16,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:16,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:16,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:16,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:16,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135937907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:16,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:16,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:16,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831709259] [2021-06-05 18:22:16,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:16,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:16,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:16,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:16,678 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) [2021-06-05 18:22:17,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:17,094 INFO L93 Difference]: Finished difference Result 4696 states and 11597 transitions. [2021-06-05 18:22:17,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:22:17,094 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 [2021-06-05 18:22:17,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:17,099 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 18:22:17,099 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 18:22:17,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 489.8ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:22:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 18:22:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 2863. [2021-06-05 18:22:17,128 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) [2021-06-05 18:22:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7803 transitions. [2021-06-05 18:22:17,132 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7803 transitions. Word has length 130 [2021-06-05 18:22:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:17,132 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7803 transitions. [2021-06-05 18:22:17,132 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) [2021-06-05 18:22:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7803 transitions. [2021-06-05 18:22:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:17,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:17,134 INFO L554 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] [2021-06-05 18:22:17,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 18:22:17,335 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:17,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:17,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-05 18:22:17,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:17,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578955144] [2021-06-05 18:22:17,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:17,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578955144] [2021-06-05 18:22:17,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578955144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:17,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726821357] [2021-06-05 18:22:17,582 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 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 [2021-06-05 18:22:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:17,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:17,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:17,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726821357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:17,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:17,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:17,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079924097] [2021-06-05 18:22:17,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:17,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:17,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:17,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:17,843 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) [2021-06-05 18:22:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:18,325 INFO L93 Difference]: Finished difference Result 4656 states and 11592 transitions. [2021-06-05 18:22:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:18,326 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 [2021-06-05 18:22:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:18,330 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 18:22:18,330 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 18:22:18,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 564.1ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:18,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 18:22:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 2938. [2021-06-05 18:22:18,357 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) [2021-06-05 18:22:18,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8028 transitions. [2021-06-05 18:22:18,361 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8028 transitions. Word has length 130 [2021-06-05 18:22:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:18,361 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8028 transitions. [2021-06-05 18:22:18,361 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) [2021-06-05 18:22:18,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8028 transitions. [2021-06-05 18:22:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:18,363 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:18,363 INFO L554 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] [2021-06-05 18:22:18,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:18,563 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-05 18:22:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:18,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566378807] [2021-06-05 18:22:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:18,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:18,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566378807] [2021-06-05 18:22:18,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566378807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:18,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723576025] [2021-06-05 18:22:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:22:18,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:18,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:18,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:18,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:19,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723576025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:19,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:19,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:19,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163919391] [2021-06-05 18:22:19,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:19,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:19,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:19,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:19,010 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) [2021-06-05 18:22:19,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:19,450 INFO L93 Difference]: Finished difference Result 4706 states and 11767 transitions. [2021-06-05 18:22:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:22:19,450 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 [2021-06-05 18:22:19,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:19,455 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 18:22:19,455 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 18:22:19,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:22:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 18:22:19,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3013. [2021-06-05 18:22:19,482 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) [2021-06-05 18:22:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8253 transitions. [2021-06-05 18:22:19,485 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8253 transitions. Word has length 130 [2021-06-05 18:22:19,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:19,485 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8253 transitions. [2021-06-05 18:22:19,485 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) [2021-06-05 18:22:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8253 transitions. [2021-06-05 18:22:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:19,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:19,488 INFO L554 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] [2021-06-05 18:22:19,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:19,690 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-05 18:22:19,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:19,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605926672] [2021-06-05 18:22:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:19,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:19,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605926672] [2021-06-05 18:22:19,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605926672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:19,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065999707] [2021-06-05 18:22:19,929 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 [2021-06-05 18:22:19,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:19,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:20,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:20,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:20,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065999707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:20,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:20,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:20,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331976060] [2021-06-05 18:22:20,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:20,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:20,170 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) [2021-06-05 18:22:20,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:20,726 INFO L93 Difference]: Finished difference Result 4731 states and 11892 transitions. [2021-06-05 18:22:20,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:20,727 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 [2021-06-05 18:22:20,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:20,732 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 18:22:20,732 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 18:22:20,732 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 624.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 18:22:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3088. [2021-06-05 18:22:20,767 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) [2021-06-05 18:22:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8478 transitions. [2021-06-05 18:22:20,771 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8478 transitions. Word has length 130 [2021-06-05 18:22:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:20,771 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8478 transitions. [2021-06-05 18:22:20,771 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) [2021-06-05 18:22:20,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8478 transitions. [2021-06-05 18:22:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:20,773 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:20,773 INFO L554 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] [2021-06-05 18:22:20,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:20,974 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:20,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-05 18:22:20,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:20,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176680864] [2021-06-05 18:22:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:21,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176680864] [2021-06-05 18:22:21,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176680864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105813576] [2021-06-05 18:22:21,193 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 [2021-06-05 18:22:21,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105813576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:21,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:21,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:21,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285736222] [2021-06-05 18:22:21,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:21,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:21,416 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) [2021-06-05 18:22:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:21,898 INFO L93 Difference]: Finished difference Result 4756 states and 12017 transitions. [2021-06-05 18:22:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:22:21,899 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 [2021-06-05 18:22:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:21,903 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 18:22:21,903 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 18:22:21,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 527.9ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:21,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 18:22:21,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3163. [2021-06-05 18:22:21,931 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) [2021-06-05 18:22:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8703 transitions. [2021-06-05 18:22:21,935 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8703 transitions. Word has length 130 [2021-06-05 18:22:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:21,935 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8703 transitions. [2021-06-05 18:22:21,935 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) [2021-06-05 18:22:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8703 transitions. [2021-06-05 18:22:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:21,937 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:21,937 INFO L554 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] [2021-06-05 18:22:22,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:22,138 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:22,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-05 18:22:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:22,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920814734] [2021-06-05 18:22:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:22,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:22,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920814734] [2021-06-05 18:22:22,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920814734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:22,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216221897] [2021-06-05 18:22:22,372 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 [2021-06-05 18:22:22,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:22,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:22,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:22,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216221897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:22,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:22,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:22,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088792703] [2021-06-05 18:22:22,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:22,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:22,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:22,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:22,613 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) [2021-06-05 18:22:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:23,215 INFO L93 Difference]: Finished difference Result 4781 states and 12142 transitions. [2021-06-05 18:22:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:23,215 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 [2021-06-05 18:22:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:23,220 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 18:22:23,220 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 18:22:23,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 649.7ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:22:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 18:22:23,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3238. [2021-06-05 18:22:23,256 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) [2021-06-05 18:22:23,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 8928 transitions. [2021-06-05 18:22:23,261 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 8928 transitions. Word has length 130 [2021-06-05 18:22:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:23,261 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 8928 transitions. [2021-06-05 18:22:23,261 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) [2021-06-05 18:22:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 8928 transitions. [2021-06-05 18:22:23,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:23,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:23,264 INFO L554 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] [2021-06-05 18:22:23,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 18:22:23,464 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:23,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-05 18:22:23,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:23,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924687366] [2021-06-05 18:22:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:23,676 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:23,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924687366] [2021-06-05 18:22:23,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924687366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:23,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167915520] [2021-06-05 18:22:23,677 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 [2021-06-05 18:22:23,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:23,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:23,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:23,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167915520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:23,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:23,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735333668] [2021-06-05 18:22:23,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:23,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:23,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:23,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:23,903 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) [2021-06-05 18:22:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:24,433 INFO L93 Difference]: Finished difference Result 4806 states and 12267 transitions. [2021-06-05 18:22:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:24,434 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 [2021-06-05 18:22:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:24,438 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 18:22:24,439 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 18:22:24,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:22:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 18:22:24,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3313. [2021-06-05 18:22:24,472 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) [2021-06-05 18:22:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9153 transitions. [2021-06-05 18:22:24,475 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9153 transitions. Word has length 130 [2021-06-05 18:22:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:24,476 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9153 transitions. [2021-06-05 18:22:24,476 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) [2021-06-05 18:22:24,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9153 transitions. [2021-06-05 18:22:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:24,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:24,478 INFO L554 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] [2021-06-05 18:22:24,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 18:22:24,678 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:24,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-05 18:22:24,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:24,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917254306] [2021-06-05 18:22:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:24,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:24,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917254306] [2021-06-05 18:22:24,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917254306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:24,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675737795] [2021-06-05 18:22:24,896 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 [2021-06-05 18:22:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:24,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:25,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675737795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:25,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:25,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:25,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430365181] [2021-06-05 18:22:25,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:25,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:25,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:25,129 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) [2021-06-05 18:22:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:25,795 INFO L93 Difference]: Finished difference Result 4831 states and 12392 transitions. [2021-06-05 18:22:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:25,795 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 [2021-06-05 18:22:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:25,799 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 18:22:25,799 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 18:22:25,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:22:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 18:22:25,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3388. [2021-06-05 18:22:25,830 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) [2021-06-05 18:22:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9378 transitions. [2021-06-05 18:22:25,834 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9378 transitions. Word has length 130 [2021-06-05 18:22:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:25,834 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9378 transitions. [2021-06-05 18:22:25,834 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) [2021-06-05 18:22:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9378 transitions. [2021-06-05 18:22:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:25,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:25,836 INFO L554 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] [2021-06-05 18:22:26,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 18:22:26,037 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-05 18:22:26,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:26,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061005727] [2021-06-05 18:22:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:26,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:26,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061005727] [2021-06-05 18:22:26,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061005727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:26,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408024885] [2021-06-05 18:22:26,272 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 [2021-06-05 18:22:26,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:26,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:26,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:26,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408024885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:26,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:26,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145511286] [2021-06-05 18:22:26,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:26,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:26,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:26,539 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) [2021-06-05 18:22:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:27,132 INFO L93 Difference]: Finished difference Result 4856 states and 12517 transitions. [2021-06-05 18:22:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:22:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:27,138 INFO L225 Difference]: With dead ends: 4856 [2021-06-05 18:22:27,138 INFO L226 Difference]: Without dead ends: 4586 [2021-06-05 18:22:27,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:22:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4586 states. [2021-06-05 18:22:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4586 to 3463. [2021-06-05 18:22:27,174 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) [2021-06-05 18:22:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9603 transitions. [2021-06-05 18:22:27,179 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9603 transitions. Word has length 130 [2021-06-05 18:22:27,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:27,179 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9603 transitions. [2021-06-05 18:22:27,179 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) [2021-06-05 18:22:27,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9603 transitions. [2021-06-05 18:22:27,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:27,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:27,182 INFO L554 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] [2021-06-05 18:22:27,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 18:22:27,382 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-05 18:22:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:27,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161262758] [2021-06-05 18:22:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:27,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:27,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161262758] [2021-06-05 18:22:27,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161262758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:27,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362527313] [2021-06-05 18:22:27,595 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 [2021-06-05 18:22:27,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:27,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362527313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:27,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:27,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506591903] [2021-06-05 18:22:27,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:27,836 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) [2021-06-05 18:22:28,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:28,568 INFO L93 Difference]: Finished difference Result 4881 states and 12642 transitions. [2021-06-05 18:22:28,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:22:28,568 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 [2021-06-05 18:22:28,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:28,573 INFO L225 Difference]: With dead ends: 4881 [2021-06-05 18:22:28,573 INFO L226 Difference]: Without dead ends: 4611 [2021-06-05 18:22:28,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:22:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-06-05 18:22:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 3538. [2021-06-05 18:22:28,610 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) [2021-06-05 18:22:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9828 transitions. [2021-06-05 18:22:28,614 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9828 transitions. Word has length 130 [2021-06-05 18:22:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9828 transitions. [2021-06-05 18:22:28,614 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) [2021-06-05 18:22:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9828 transitions. [2021-06-05 18:22:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:28,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:28,617 INFO L554 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] [2021-06-05 18:22:28,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:28,818 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:28,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:28,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-05 18:22:28,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:28,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209810230] [2021-06-05 18:22:28,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:29,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:29,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209810230] [2021-06-05 18:22:29,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209810230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:29,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786597349] [2021-06-05 18:22:29,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:22:29,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:29,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786597349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:29,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:29,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368214923] [2021-06-05 18:22:29,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:29,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:29,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:29,243 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) [2021-06-05 18:22:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:29,852 INFO L93 Difference]: Finished difference Result 4906 states and 12767 transitions. [2021-06-05 18:22:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:29,853 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 [2021-06-05 18:22:29,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:29,857 INFO L225 Difference]: With dead ends: 4906 [2021-06-05 18:22:29,857 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 18:22:29,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:22:29,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 18:22:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3613. [2021-06-05 18:22:29,891 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) [2021-06-05 18:22:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10053 transitions. [2021-06-05 18:22:29,895 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10053 transitions. Word has length 130 [2021-06-05 18:22:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:29,895 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10053 transitions. [2021-06-05 18:22:29,895 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) [2021-06-05 18:22:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10053 transitions. [2021-06-05 18:22:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:29,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:29,898 INFO L554 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] [2021-06-05 18:22:30,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 18:22:30,099 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-05 18:22:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:30,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76751166] [2021-06-05 18:22:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:30,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76751166] [2021-06-05 18:22:30,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76751166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618820211] [2021-06-05 18:22:30,304 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 [2021-06-05 18:22:30,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:30,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:30,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618820211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:30,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:30,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:30,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440307366] [2021-06-05 18:22:30,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:30,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:30,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:30,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:30,554 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) [2021-06-05 18:22:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:31,315 INFO L93 Difference]: Finished difference Result 4931 states and 12892 transitions. [2021-06-05 18:22:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:22:31,315 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 [2021-06-05 18:22:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:31,320 INFO L225 Difference]: With dead ends: 4931 [2021-06-05 18:22:31,320 INFO L226 Difference]: Without dead ends: 4661 [2021-06-05 18:22:31,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:22:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4661 states. [2021-06-05 18:22:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4661 to 3688. [2021-06-05 18:22:31,354 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) [2021-06-05 18:22:31,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10278 transitions. [2021-06-05 18:22:31,359 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10278 transitions. Word has length 130 [2021-06-05 18:22:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:31,359 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10278 transitions. [2021-06-05 18:22:31,359 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) [2021-06-05 18:22:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10278 transitions. [2021-06-05 18:22:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:31,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:31,362 INFO L554 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] [2021-06-05 18:22:31,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:31,562 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-05 18:22:31,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:31,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239904478] [2021-06-05 18:22:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:31,759 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:31,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239904478] [2021-06-05 18:22:31,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239904478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:31,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245853954] [2021-06-05 18:22:31,760 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 [2021-06-05 18:22:31,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:31,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:31,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:31,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245853954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:31,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:31,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:31,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039520791] [2021-06-05 18:22:31,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:31,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:31,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:31,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:31,981 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) [2021-06-05 18:22:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:32,633 INFO L93 Difference]: Finished difference Result 4956 states and 13017 transitions. [2021-06-05 18:22:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:22:32,633 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 [2021-06-05 18:22:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:32,637 INFO L225 Difference]: With dead ends: 4956 [2021-06-05 18:22:32,637 INFO L226 Difference]: Without dead ends: 4686 [2021-06-05 18:22:32,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 637.8ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:22:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4686 states. [2021-06-05 18:22:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4686 to 3763. [2021-06-05 18:22:32,672 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) [2021-06-05 18:22:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10503 transitions. [2021-06-05 18:22:32,676 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10503 transitions. Word has length 130 [2021-06-05 18:22:32,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:32,676 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10503 transitions. [2021-06-05 18:22:32,676 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) [2021-06-05 18:22:32,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10503 transitions. [2021-06-05 18:22:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:32,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:32,679 INFO L554 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] [2021-06-05 18:22:32,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 18:22:32,880 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:32,880 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-05 18:22:32,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:32,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521428166] [2021-06-05 18:22:32,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:33,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521428166] [2021-06-05 18:22:33,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521428166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956727444] [2021-06-05 18:22:33,105 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 [2021-06-05 18:22:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:33,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:33,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:33,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956727444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:33,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:33,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:33,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415345040] [2021-06-05 18:22:33,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:33,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:33,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:33,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:33,347 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) [2021-06-05 18:22:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:34,178 INFO L93 Difference]: Finished difference Result 4981 states and 13142 transitions. [2021-06-05 18:22:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:22:34,178 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 [2021-06-05 18:22:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:34,183 INFO L225 Difference]: With dead ends: 4981 [2021-06-05 18:22:34,183 INFO L226 Difference]: Without dead ends: 4711 [2021-06-05 18:22:34,184 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 831.4ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:22:34,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4711 states. [2021-06-05 18:22:34,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4711 to 3838. [2021-06-05 18:22:34,219 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) [2021-06-05 18:22:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10728 transitions. [2021-06-05 18:22:34,223 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10728 transitions. Word has length 130 [2021-06-05 18:22:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10728 transitions. [2021-06-05 18:22:34,224 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) [2021-06-05 18:22:34,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10728 transitions. [2021-06-05 18:22:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:34,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:34,226 INFO L554 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] [2021-06-05 18:22:34,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:34,427 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:34,427 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-05 18:22:34,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:34,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486360484] [2021-06-05 18:22:34,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:34,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486360484] [2021-06-05 18:22:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486360484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436162570] [2021-06-05 18:22:34,648 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 [2021-06-05 18:22:34,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:34,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:34,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:34,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:34,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436162570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:34,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:34,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:34,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092726842] [2021-06-05 18:22:34,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:34,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:34,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:34,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:34,902 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) [2021-06-05 18:22:35,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:35,661 INFO L93 Difference]: Finished difference Result 5006 states and 13267 transitions. [2021-06-05 18:22:35,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:22:35,661 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 [2021-06-05 18:22:35,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:35,665 INFO L225 Difference]: With dead ends: 5006 [2021-06-05 18:22:35,665 INFO L226 Difference]: Without dead ends: 4736 [2021-06-05 18:22:35,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 723.2ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:22:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-05 18:22:35,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 3913. [2021-06-05 18:22:35,705 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) [2021-06-05 18:22:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 10953 transitions. [2021-06-05 18:22:35,710 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 10953 transitions. Word has length 130 [2021-06-05 18:22:35,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:35,710 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 10953 transitions. [2021-06-05 18:22:35,711 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) [2021-06-05 18:22:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 10953 transitions. [2021-06-05 18:22:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:35,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:35,714 INFO L554 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] [2021-06-05 18:22:35,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:35,914 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:35,915 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-05 18:22:35,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:35,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272699581] [2021-06-05 18:22:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:36,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:36,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272699581] [2021-06-05 18:22:36,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272699581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:36,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619769250] [2021-06-05 18:22:36,111 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 [2021-06-05 18:22:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:36,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:36,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619769250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:36,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:36,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:36,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490048188] [2021-06-05 18:22:36,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:36,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:36,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:36,342 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) [2021-06-05 18:22:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:37,244 INFO L93 Difference]: Finished difference Result 5031 states and 13392 transitions. [2021-06-05 18:22:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:22:37,244 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 [2021-06-05 18:22:37,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:37,250 INFO L225 Difference]: With dead ends: 5031 [2021-06-05 18:22:37,250 INFO L226 Difference]: Without dead ends: 4761 [2021-06-05 18:22:37,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 849.5ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:22:37,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4761 states. [2021-06-05 18:22:37,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4761 to 3988. [2021-06-05 18:22:37,303 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) [2021-06-05 18:22:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 11178 transitions. [2021-06-05 18:22:37,309 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 11178 transitions. Word has length 130 [2021-06-05 18:22:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:37,309 INFO L482 AbstractCegarLoop]: Abstraction has 3988 states and 11178 transitions. [2021-06-05 18:22:37,310 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) [2021-06-05 18:22:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 11178 transitions. [2021-06-05 18:22:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:37,314 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:37,314 INFO L554 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] [2021-06-05 18:22:37,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:37,514 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:37,514 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-05 18:22:37,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:37,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386418642] [2021-06-05 18:22:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:37,705 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:37,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386418642] [2021-06-05 18:22:37,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386418642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:37,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614702680] [2021-06-05 18:22:37,706 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 [2021-06-05 18:22:37,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:37,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614702680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:37,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:37,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034519059] [2021-06-05 18:22:37,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:37,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:37,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:37,915 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) [2021-06-05 18:22:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:38,666 INFO L93 Difference]: Finished difference Result 5056 states and 13517 transitions. [2021-06-05 18:22:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:22:38,666 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 [2021-06-05 18:22:38,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:38,671 INFO L225 Difference]: With dead ends: 5056 [2021-06-05 18:22:38,671 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 18:22:38,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 703.2ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:22:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 18:22:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 4063. [2021-06-05 18:22:38,711 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) [2021-06-05 18:22:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4063 states to 4063 states and 11403 transitions. [2021-06-05 18:22:38,716 INFO L78 Accepts]: Start accepts. Automaton has 4063 states and 11403 transitions. Word has length 130 [2021-06-05 18:22:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:38,716 INFO L482 AbstractCegarLoop]: Abstraction has 4063 states and 11403 transitions. [2021-06-05 18:22:38,717 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) [2021-06-05 18:22:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4063 states and 11403 transitions. [2021-06-05 18:22:38,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:38,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:38,720 INFO L554 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] [2021-06-05 18:22:38,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 18:22:38,920 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:38,921 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-05 18:22:38,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:38,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405239675] [2021-06-05 18:22:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:39,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405239675] [2021-06-05 18:22:39,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405239675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:39,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511086460] [2021-06-05 18:22:39,141 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 [2021-06-05 18:22:39,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:39,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:39,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511086460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:39,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:39,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:22:39,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120483476] [2021-06-05 18:22:39,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:39,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:39,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:39,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:39,368 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) [2021-06-05 18:22:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:40,317 INFO L93 Difference]: Finished difference Result 5141 states and 13807 transitions. [2021-06-05 18:22:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:22:40,317 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 [2021-06-05 18:22:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:40,322 INFO L225 Difference]: With dead ends: 5141 [2021-06-05 18:22:40,322 INFO L226 Difference]: Without dead ends: 4871 [2021-06-05 18:22:40,323 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=1235, Invalid=3321, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:22:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2021-06-05 18:22:40,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4138. [2021-06-05 18:22:40,358 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) [2021-06-05 18:22:40,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-05 18:22:40,363 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-05 18:22:40,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:40,363 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-05 18:22:40,363 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) [2021-06-05 18:22:40,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-05 18:22:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:40,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:40,366 INFO L554 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] [2021-06-05 18:22:40,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 18:22:40,567 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:40,567 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-05 18:22:40,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:40,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646231741] [2021-06-05 18:22:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:40,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:40,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646231741] [2021-06-05 18:22:40,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646231741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:40,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123846679] [2021-06-05 18:22:40,775 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 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 [2021-06-05 18:22:40,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:40,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:40,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:40,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:40,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123846679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:40,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:40,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:22:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774523931] [2021-06-05 18:22:40,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:22:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:22:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:22:40,994 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) [2021-06-05 18:22:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:41,766 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-05 18:22:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:22:41,766 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 [2021-06-05 18:22:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:41,772 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 18:22:41,772 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 18:22:41,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 750.8ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:22:41,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 18:22:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-05 18:22:41,813 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) [2021-06-05 18:22:41,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-05 18:22:41,819 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-05 18:22:41,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:41,819 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-05 18:22:41,819 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) [2021-06-05 18:22:41,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-05 18:22:41,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:22:41,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:41,822 INFO L554 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] [2021-06-05 18:22:42,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 18:22:42,023 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:42,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:42,023 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-05 18:22:42,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:42,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38425705] [2021-06-05 18:22:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:42,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:42,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38425705] [2021-06-05 18:22:42,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38425705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:42,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711651529] [2021-06-05 18:22:42,212 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 [2021-06-05 18:22:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:42,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:22:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:42,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711651529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:42,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:42,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-06-05 18:22:42,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136962854] [2021-06-05 18:22:42,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:42,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:42,464 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:43,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:43,529 INFO L93 Difference]: Finished difference Result 5851 states and 15841 transitions. [2021-06-05 18:22:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:22:43,529 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:22:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:43,534 INFO L225 Difference]: With dead ends: 5851 [2021-06-05 18:22:43,534 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:22:43,535 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=1449, Invalid=3953, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:22:43,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:22:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-05 18:22:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:43,582 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 130 [2021-06-05 18:22:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:43,583 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:43,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 4.925925925925926) internal successors, (133), 27 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:43,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:43,587 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:43,587 INFO L554 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] [2021-06-05 18:22:43,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 18:22:43,787 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-05 18:22:43,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:43,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438747305] [2021-06-05 18:22:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:44,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438747305] [2021-06-05 18:22:44,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438747305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439847920] [2021-06-05 18:22:44,035 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 [2021-06-05 18:22:44,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:44,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:44,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439847920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:44,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:44,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:44,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778478215] [2021-06-05 18:22:44,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:44,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:44,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:44,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:44,264 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:44,753 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-05 18:22:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:22:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:44,760 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:22:44,760 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:22:44,760 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 538.6ms TimeCoverageRelationStatistics Valid=687, Invalid=1965, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:22:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:22:44,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-05 18:22:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:44,808 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:44,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:44,808 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:44,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:44,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:44,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:44,812 INFO L554 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] [2021-06-05 18:22:45,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 18:22:45,012 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:45,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:45,012 INFO L82 PathProgramCache]: Analyzing trace with hash 107756616, now seen corresponding path program 207 times [2021-06-05 18:22:45,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:45,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670814272] [2021-06-05 18:22:45,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:45,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:45,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670814272] [2021-06-05 18:22:45,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670814272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413364745] [2021-06-05 18:22:45,272 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 [2021-06-05 18:22:45,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:45,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:45,529 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:45,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413364745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:45,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:45,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:45,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463363719] [2021-06-05 18:22:45,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:45,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:45,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:45,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:45,530 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:46,068 INFO L93 Difference]: Finished difference Result 6141 states and 15987 transitions. [2021-06-05 18:22:46,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:22:46,068 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 [2021-06-05 18:22:46,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:46,074 INFO L225 Difference]: With dead ends: 6141 [2021-06-05 18:22:46,074 INFO L226 Difference]: Without dead ends: 5871 [2021-06-05 18:22:46,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=743, Invalid=2227, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:22:46,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5871 states. [2021-06-05 18:22:46,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5871 to 4353. [2021-06-05 18:22:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:46,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:46,117 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:46,117 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:46,117 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) [2021-06-05 18:22:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:46,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:46,121 INFO L554 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] [2021-06-05 18:22:46,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:46,321 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash 61209686, now seen corresponding path program 208 times [2021-06-05 18:22:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:46,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855846343] [2021-06-05 18:22:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:46,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:46,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855846343] [2021-06-05 18:22:46,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855846343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:46,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106018118] [2021-06-05 18:22:46,557 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 [2021-06-05 18:22:46,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:46,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:46,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:46,782 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:46,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106018118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:46,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:46,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:46,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486903562] [2021-06-05 18:22:46,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:46,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:46,783 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:47,289 INFO L93 Difference]: Finished difference Result 6096 states and 15897 transitions. [2021-06-05 18:22:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:22:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:47,296 INFO L225 Difference]: With dead ends: 6096 [2021-06-05 18:22:47,296 INFO L226 Difference]: Without dead ends: 5826 [2021-06-05 18:22:47,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 560.4ms TimeCoverageRelationStatistics Valid=741, Invalid=2229, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:22:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-05 18:22:47,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4353. [2021-06-05 18:22:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:47,353 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:47,353 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:47,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:47,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:47,357 INFO L554 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] [2021-06-05 18:22:47,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 18:22:47,558 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:47,558 INFO L82 PathProgramCache]: Analyzing trace with hash -857174714, now seen corresponding path program 209 times [2021-06-05 18:22:47,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:47,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861984151] [2021-06-05 18:22:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:47,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:47,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861984151] [2021-06-05 18:22:47,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861984151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:47,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989799095] [2021-06-05 18:22:47,808 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 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 [2021-06-05 18:22:47,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:47,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:47,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:48,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989799095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:48,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:48,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:48,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826421476] [2021-06-05 18:22:48,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:48,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:48,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:48,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:48,053 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:48,681 INFO L93 Difference]: Finished difference Result 6046 states and 15797 transitions. [2021-06-05 18:22:48,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:22:48,682 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 [2021-06-05 18:22:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:48,688 INFO L225 Difference]: With dead ends: 6046 [2021-06-05 18:22:48,689 INFO L226 Difference]: Without dead ends: 5776 [2021-06-05 18:22:48,689 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 647.0ms TimeCoverageRelationStatistics Valid=763, Invalid=2429, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:22:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-05 18:22:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4353. [2021-06-05 18:22:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:48,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:48,744 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:48,745 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:48,745 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) [2021-06-05 18:22:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:48,748 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:48,749 INFO L554 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] [2021-06-05 18:22:48,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:48,949 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:48,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1661101780, now seen corresponding path program 210 times [2021-06-05 18:22:48,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:48,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119540775] [2021-06-05 18:22:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:48,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:49,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:49,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119540775] [2021-06-05 18:22:49,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119540775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:49,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484375359] [2021-06-05 18:22:49,213 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 [2021-06-05 18:22:49,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:49,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:49,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:49,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484375359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:49,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:49,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:49,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292676967] [2021-06-05 18:22:49,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:49,455 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:50,022 INFO L93 Difference]: Finished difference Result 5996 states and 15697 transitions. [2021-06-05 18:22:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:22:50,022 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:50,028 INFO L225 Difference]: With dead ends: 5996 [2021-06-05 18:22:50,028 INFO L226 Difference]: Without dead ends: 5726 [2021-06-05 18:22:50,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 618.2ms TimeCoverageRelationStatistics Valid=775, Invalid=2417, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:22:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-05 18:22:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4353. [2021-06-05 18:22:50,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:50,075 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:50,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:50,075 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:50,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:50,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:50,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:50,078 INFO L554 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] [2021-06-05 18:22:50,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:50,279 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:50,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:50,279 INFO L82 PathProgramCache]: Analyzing trace with hash -534223932, now seen corresponding path program 211 times [2021-06-05 18:22:50,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:50,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568220951] [2021-06-05 18:22:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:50,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:50,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568220951] [2021-06-05 18:22:50,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568220951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:50,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147420342] [2021-06-05 18:22:50,514 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 [2021-06-05 18:22:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:50,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147420342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:50,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:50,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:50,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178511094] [2021-06-05 18:22:50,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:50,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:50,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:50,791 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:51,454 INFO L93 Difference]: Finished difference Result 5946 states and 15597 transitions. [2021-06-05 18:22:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:22:51,454 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 [2021-06-05 18:22:51,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:51,460 INFO L225 Difference]: With dead ends: 5946 [2021-06-05 18:22:51,460 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 18:22:51,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 676.1ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:22:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 18:22:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4353. [2021-06-05 18:22:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:51,511 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:51,511 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:51,511 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) [2021-06-05 18:22:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:51,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:51,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:51,515 INFO L554 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] [2021-06-05 18:22:51,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:51,715 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:51,716 INFO L82 PathProgramCache]: Analyzing trace with hash 975976146, now seen corresponding path program 212 times [2021-06-05 18:22:51,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:51,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025083508] [2021-06-05 18:22:51,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:51,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:51,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025083508] [2021-06-05 18:22:51,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025083508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:51,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611262511] [2021-06-05 18:22:51,965 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 [2021-06-05 18:22:52,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:22:52,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:52,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:52,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611262511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:52,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:52,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:52,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674576946] [2021-06-05 18:22:52,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:52,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:52,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:52,193 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:52,775 INFO L93 Difference]: Finished difference Result 5896 states and 15497 transitions. [2021-06-05 18:22:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:22:52,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:52,782 INFO L225 Difference]: With dead ends: 5896 [2021-06-05 18:22:52,782 INFO L226 Difference]: Without dead ends: 5626 [2021-06-05 18:22:52,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=825, Invalid=2597, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:22:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-05 18:22:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4353. [2021-06-05 18:22:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:52,834 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:52,834 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:52,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:52,838 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:52,838 INFO L554 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] [2021-06-05 18:22:53,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:22:53,039 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:53,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:53,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1615634370, now seen corresponding path program 213 times [2021-06-05 18:22:53,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:53,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881038798] [2021-06-05 18:22:53,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:53,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:53,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881038798] [2021-06-05 18:22:53,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881038798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:53,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342804307] [2021-06-05 18:22:53,307 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 [2021-06-05 18:22:53,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:22:53,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:53,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342804307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:53,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:53,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:53,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143847709] [2021-06-05 18:22:53,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:53,560 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:54,255 INFO L93 Difference]: Finished difference Result 5846 states and 15397 transitions. [2021-06-05 18:22:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:22:54,255 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 [2021-06-05 18:22:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:54,261 INFO L225 Difference]: With dead ends: 5846 [2021-06-05 18:22:54,261 INFO L226 Difference]: Without dead ends: 5576 [2021-06-05 18:22:54,261 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:22:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-05 18:22:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4353. [2021-06-05 18:22:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:54,304 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:54,304 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:54,305 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) [2021-06-05 18:22:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:54,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:54,308 INFO L554 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] [2021-06-05 18:22:54,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 18:22:54,508 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:54,509 INFO L82 PathProgramCache]: Analyzing trace with hash 840715344, now seen corresponding path program 214 times [2021-06-05 18:22:54,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:54,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071100816] [2021-06-05 18:22:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:54,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071100816] [2021-06-05 18:22:54,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071100816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:54,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198108496] [2021-06-05 18:22:54,722 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 [2021-06-05 18:22:54,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:22:54,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:54,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:54,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198108496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:54,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:54,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:54,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079394058] [2021-06-05 18:22:54,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:54,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:54,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:54,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:54,946 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:55,580 INFO L93 Difference]: Finished difference Result 5796 states and 15297 transitions. [2021-06-05 18:22:55,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:22:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:55,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:55,586 INFO L225 Difference]: With dead ends: 5796 [2021-06-05 18:22:55,586 INFO L226 Difference]: Without dead ends: 5526 [2021-06-05 18:22:55,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=891, Invalid=2769, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:22:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-05 18:22:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4353. [2021-06-05 18:22:55,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:55,644 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:55,645 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:55,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:55,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:55,648 INFO L554 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] [2021-06-05 18:22:55,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 18:22:55,848 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:55,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 386801984, now seen corresponding path program 215 times [2021-06-05 18:22:55,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:55,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727144616] [2021-06-05 18:22:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:56,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:56,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727144616] [2021-06-05 18:22:56,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727144616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:56,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291248977] [2021-06-05 18:22:56,072 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 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 [2021-06-05 18:22:56,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:22:56,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:56,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:56,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291248977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:56,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:56,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067795866] [2021-06-05 18:22:56,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:56,312 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:57,050 INFO L93 Difference]: Finished difference Result 5746 states and 15197 transitions. [2021-06-05 18:22:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:22:57,051 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 [2021-06-05 18:22:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:57,057 INFO L225 Difference]: With dead ends: 5746 [2021-06-05 18:22:57,057 INFO L226 Difference]: Without dead ends: 5476 [2021-06-05 18:22:57,058 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=919, Invalid=2987, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:22:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-05 18:22:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4353. [2021-06-05 18:22:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:57,109 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:57,109 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:57,109 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) [2021-06-05 18:22:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:57,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:57,113 INFO L554 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] [2021-06-05 18:22:57,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 18:22:57,313 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:57,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1264813902, now seen corresponding path program 216 times [2021-06-05 18:22:57,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:57,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562657376] [2021-06-05 18:22:57,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:57,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562657376] [2021-06-05 18:22:57,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562657376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:57,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831134273] [2021-06-05 18:22:57,563 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 [2021-06-05 18:22:57,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:22:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:22:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:57,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:57,841 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:57,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831134273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:57,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:57,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:22:57,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908868510] [2021-06-05 18:22:57,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:22:57,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:57,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:22:57,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:22:57,843 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:22:58,545 INFO L93 Difference]: Finished difference Result 5696 states and 15097 transitions. [2021-06-05 18:22:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:22:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:22:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:22:58,552 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:22:58,552 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:22:58,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 720.9ms TimeCoverageRelationStatistics Valid=973, Invalid=2933, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:22:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:22:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4353. [2021-06-05 18:22:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:22:58,616 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:22:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:22:58,617 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:22:58,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:22:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:22:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:22:58,621 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:22:58,621 INFO L554 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] [2021-06-05 18:22:58,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 18:22:58,822 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:22:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:22:58,823 INFO L82 PathProgramCache]: Analyzing trace with hash 364759102, now seen corresponding path program 217 times [2021-06-05 18:22:58,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:22:58,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667917823] [2021-06-05 18:22:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:22:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:59,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:22:59,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667917823] [2021-06-05 18:22:59,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667917823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:59,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587985350] [2021-06-05 18:22:59,040 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 [2021-06-05 18:22:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:22:59,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:22:59,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:22:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:22:59,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587985350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:22:59,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:22:59,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:22:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696470513] [2021-06-05 18:22:59,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:22:59,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:22:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:22:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:22:59,277 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:00,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:00,084 INFO L93 Difference]: Finished difference Result 5646 states and 14997 transitions. [2021-06-05 18:23:00,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:23:00,084 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 [2021-06-05 18:23:00,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:00,090 INFO L225 Difference]: With dead ends: 5646 [2021-06-05 18:23:00,090 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 18:23:00,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 792.9ms TimeCoverageRelationStatistics Valid=1003, Invalid=3157, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 18:23:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4353. [2021-06-05 18:23:00,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:00,137 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:00,137 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:00,137 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) [2021-06-05 18:23:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:00,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:00,140 INFO L554 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] [2021-06-05 18:23:00,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:00,341 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash -64305204, now seen corresponding path program 218 times [2021-06-05 18:23:00,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:00,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329627937] [2021-06-05 18:23:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:00,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:00,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329627937] [2021-06-05 18:23:00,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329627937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:00,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019461987] [2021-06-05 18:23:00,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:23:00,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:00,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:00,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019461987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:00,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:00,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:23:00,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210038951] [2021-06-05 18:23:00,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:00,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:00,789 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:01,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:01,502 INFO L93 Difference]: Finished difference Result 5596 states and 14897 transitions. [2021-06-05 18:23:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:23:01,503 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:23:01,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:01,508 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 18:23:01,508 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 18:23:01,508 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=1071, Invalid=3089, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 18:23:01,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4353. [2021-06-05 18:23:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:01,549 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:01,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:01,549 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:01,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:01,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:01,552 INFO L554 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] [2021-06-05 18:23:01,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 18:23:01,752 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:01,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:01,753 INFO L82 PathProgramCache]: Analyzing trace with hash -750488388, now seen corresponding path program 219 times [2021-06-05 18:23:01,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:01,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612512495] [2021-06-05 18:23:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:01,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:01,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612512495] [2021-06-05 18:23:01,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612512495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:01,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206994771] [2021-06-05 18:23:01,960 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 [2021-06-05 18:23:02,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:02,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:02,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:02,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:02,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206994771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:02,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:02,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:23:02,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773346732] [2021-06-05 18:23:02,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:23:02,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:23:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:23:02,200 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:03,074 INFO L93 Difference]: Finished difference Result 5546 states and 14797 transitions. [2021-06-05 18:23:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:23:03,074 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 [2021-06-05 18:23:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:03,080 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 18:23:03,080 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:23:03,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=1103, Invalid=3319, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:23:03,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:23:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4353. [2021-06-05 18:23:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:03,159 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:03,159 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:03,160 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) [2021-06-05 18:23:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:03,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:03,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:03,163 INFO L554 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] [2021-06-05 18:23:03,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:03,364 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash -835523126, now seen corresponding path program 220 times [2021-06-05 18:23:03,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:03,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686220227] [2021-06-05 18:23:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:03,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:03,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686220227] [2021-06-05 18:23:03,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686220227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:03,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134151573] [2021-06-05 18:23:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:23:03,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:03,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:03,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:03,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134151573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:03,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:03,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:23:03,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18504022] [2021-06-05 18:23:03,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:03,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:03,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:03,830 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:04,566 INFO L93 Difference]: Finished difference Result 5496 states and 14697 transitions. [2021-06-05 18:23:04,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:23:04,567 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:23:04,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:04,572 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:23:04,572 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:23:04,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 744.4ms TimeCoverageRelationStatistics Valid=1185, Invalid=3237, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:23:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:23:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-05 18:23:04,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:04,613 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:04,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:04,614 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:04,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:04,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:04,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:04,617 INFO L554 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] [2021-06-05 18:23:04,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 18:23:04,817 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -903674182, now seen corresponding path program 221 times [2021-06-05 18:23:04,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:04,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65672810] [2021-06-05 18:23:04,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:05,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65672810] [2021-06-05 18:23:05,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65672810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:05,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633697551] [2021-06-05 18:23:05,024 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 [2021-06-05 18:23:05,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:23:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:05,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:05,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633697551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:05,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:05,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:23:05,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618501761] [2021-06-05 18:23:05,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:23:05,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:05,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:23:05,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:23:05,258 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:06,180 INFO L93 Difference]: Finished difference Result 5446 states and 14597 transitions. [2021-06-05 18:23:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:23:06,180 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 [2021-06-05 18:23:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:06,185 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:23:06,185 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:23:06,185 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 890.0ms TimeCoverageRelationStatistics Valid=1219, Invalid=3473, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:23:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:23:06,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4353. [2021-06-05 18:23:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:06,228 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:06,228 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:06,228 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) [2021-06-05 18:23:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:06,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:06,231 INFO L554 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] [2021-06-05 18:23:06,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:06,432 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:06,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2094324040, now seen corresponding path program 222 times [2021-06-05 18:23:06,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:06,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692971612] [2021-06-05 18:23:06,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:06,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:06,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692971612] [2021-06-05 18:23:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692971612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012970592] [2021-06-05 18:23:06,642 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 [2021-06-05 18:23:06,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:23:06,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:06,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:06,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012970592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:06,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:06,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:23:06,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760661215] [2021-06-05 18:23:06,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:06,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:06,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:06,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:06,867 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:07,639 INFO L93 Difference]: Finished difference Result 5396 states and 14497 transitions. [2021-06-05 18:23:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:23:07,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:23:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:07,645 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 18:23:07,645 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 18:23:07,646 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=1315, Invalid=3377, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:23:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 18:23:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4353. [2021-06-05 18:23:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.8223805147058822) internal successors, (12283), 4352 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12283 transitions. [2021-06-05 18:23:07,692 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12283 transitions. Word has length 135 [2021-06-05 18:23:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:07,692 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12283 transitions. [2021-06-05 18:23:07,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12283 transitions. [2021-06-05 18:23:07,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:07,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:07,696 INFO L554 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] [2021-06-05 18:23:07,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:07,896 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1770889672, now seen corresponding path program 223 times [2021-06-05 18:23:07,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:07,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452947027] [2021-06-05 18:23:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:08,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452947027] [2021-06-05 18:23:08,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452947027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:08,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430377319] [2021-06-05 18:23:08,099 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 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 [2021-06-05 18:23:08,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:08,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:08,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430377319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:08,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:08,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-06-05 18:23:08,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63963244] [2021-06-05 18:23:08,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:23:08,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:08,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:23:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:23:08,355 INFO L87 Difference]: Start difference. First operand 4353 states and 12283 transitions. Second operand has 27 states, 27 states have (on average 5.074074074074074) internal successors, (137), 27 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:09,302 INFO L93 Difference]: Finished difference Result 5406 states and 14547 transitions. [2021-06-05 18:23:09,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:23:09,302 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 [2021-06-05 18:23:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:09,307 INFO L225 Difference]: With dead ends: 5406 [2021-06-05 18:23:09,308 INFO L226 Difference]: Without dead ends: 5136 [2021-06-05 18:23:09,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=1351, Invalid=3619, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:23:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5136 states. [2021-06-05 18:23:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5136 to 4353. [2021-06-05 18:23:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.823529411764706) internal successors, (12288), 4352 states have internal predecessors, (12288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12288 transitions. [2021-06-05 18:23:09,349 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12288 transitions. Word has length 135 [2021-06-05 18:23:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:09,349 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12288 transitions. [2021-06-05 18:23:09,349 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) [2021-06-05 18:23:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12288 transitions. [2021-06-05 18:23:09,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:09,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:09,352 INFO L554 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] [2021-06-05 18:23:09,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:09,553 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1828623802, now seen corresponding path program 224 times [2021-06-05 18:23:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:09,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711746291] [2021-06-05 18:23:09,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:09,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711746291] [2021-06-05 18:23:09,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711746291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668716734] [2021-06-05 18:23:09,755 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 [2021-06-05 18:23:09,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:09,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:09,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668716734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:09,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:09,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-06-05 18:23:09,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54752058] [2021-06-05 18:23:09,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:23:09,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:23:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:23:09,970 INFO L87 Difference]: Start difference. First operand 4353 states and 12288 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:10,789 INFO L93 Difference]: Finished difference Result 6148 states and 16671 transitions. [2021-06-05 18:23:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:23:10,790 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:23:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:10,795 INFO L225 Difference]: With dead ends: 6148 [2021-06-05 18:23:10,795 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 18:23:10,796 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=1462, Invalid=3508, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:23:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 18:23:10,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4533. [2021-06-05 18:23:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4533 states, 4532 states have (on average 2.834730803177405) internal successors, (12847), 4532 states have internal predecessors, (12847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 12847 transitions. [2021-06-05 18:23:10,848 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 12847 transitions. Word has length 135 [2021-06-05 18:23:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:10,848 INFO L482 AbstractCegarLoop]: Abstraction has 4533 states and 12847 transitions. [2021-06-05 18:23:10,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 12847 transitions. [2021-06-05 18:23:10,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:23:10,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:10,852 INFO L554 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] [2021-06-05 18:23:11,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:11,052 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1806280552, now seen corresponding path program 225 times [2021-06-05 18:23:11,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:11,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334267478] [2021-06-05 18:23:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:11,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:11,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334267478] [2021-06-05 18:23:11,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334267478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:11,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455014073] [2021-06-05 18:23:11,260 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 [2021-06-05 18:23:11,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:23:11,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:11,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:23:11,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:11,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455014073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:11,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:11,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:23:11,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708838609] [2021-06-05 18:23:11,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:11,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:11,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:11,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:11,514 INFO L87 Difference]: Start difference. First operand 4533 states and 12847 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 28 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:12,566 INFO L93 Difference]: Finished difference Result 6016 states and 16336 transitions. [2021-06-05 18:23:12,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:23:12,567 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 [2021-06-05 18:23:12,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:12,573 INFO L225 Difference]: With dead ends: 6016 [2021-06-05 18:23:12,573 INFO L226 Difference]: Without dead ends: 5441 [2021-06-05 18:23:12,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=1574, Invalid=4278, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:23:12,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5441 states. [2021-06-05 18:23:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5441 to 2924. [2021-06-05 18:23:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.738966814916182) internal successors, (8006), 2923 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 8006 transitions. [2021-06-05 18:23:12,616 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 8006 transitions. Word has length 135 [2021-06-05 18:23:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:12,616 INFO L482 AbstractCegarLoop]: Abstraction has 2924 states and 8006 transitions. [2021-06-05 18:23:12,616 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) [2021-06-05 18:23:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 8006 transitions. [2021-06-05 18:23:12,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:12,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:12,619 INFO L554 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] [2021-06-05 18:23:12,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 18:23:12,821 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:12,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375444, now seen corresponding path program 226 times [2021-06-05 18:23:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:12,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218655304] [2021-06-05 18:23:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:13,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:13,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218655304] [2021-06-05 18:23:13,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218655304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:13,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537632589] [2021-06-05 18:23:13,083 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 [2021-06-05 18:23:13,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:13,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:13,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:13,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:13,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537632589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:13,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:13,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 31 [2021-06-05 18:23:13,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190724848] [2021-06-05 18:23:13,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:23:13,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:13,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:23:13,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=722, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:23:13,401 INFO L87 Difference]: Start difference. First operand 2924 states and 8006 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 31 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:13,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:13,948 INFO L93 Difference]: Finished difference Result 4114 states and 10706 transitions. [2021-06-05 18:23:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:13,948 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 [2021-06-05 18:23:13,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:13,952 INFO L225 Difference]: With dead ends: 4114 [2021-06-05 18:23:13,952 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 18:23:13,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 661.2ms TimeCoverageRelationStatistics Valid=926, Invalid=2496, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:23:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 18:23:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3009. [2021-06-05 18:23:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3009 states, 3008 states have (on average 2.7180851063829787) internal successors, (8176), 3008 states have internal predecessors, (8176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:13,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 8176 transitions. [2021-06-05 18:23:13,980 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 8176 transitions. Word has length 140 [2021-06-05 18:23:13,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:13,980 INFO L482 AbstractCegarLoop]: Abstraction has 3009 states and 8176 transitions. [2021-06-05 18:23:13,980 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) [2021-06-05 18:23:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 8176 transitions. [2021-06-05 18:23:13,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:13,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:13,983 INFO L554 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] [2021-06-05 18:23:14,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 18:23:14,183 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:14,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:14,184 INFO L82 PathProgramCache]: Analyzing trace with hash 683281208, now seen corresponding path program 227 times [2021-06-05 18:23:14,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:14,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62438697] [2021-06-05 18:23:14,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:14,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62438697] [2021-06-05 18:23:14,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62438697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:14,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443589653] [2021-06-05 18:23:14,456 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 [2021-06-05 18:23:14,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:23:14,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:14,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443589653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:14,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:14,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:14,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784206515] [2021-06-05 18:23:14,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:14,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:14,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:14,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:14,715 INFO L87 Difference]: Start difference. First operand 3009 states and 8176 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:15,192 INFO L93 Difference]: Finished difference Result 5136 states and 12687 transitions. [2021-06-05 18:23:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:23:15,192 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 [2021-06-05 18:23:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:15,197 INFO L225 Difference]: With dead ends: 5136 [2021-06-05 18:23:15,197 INFO L226 Difference]: Without dead ends: 4866 [2021-06-05 18:23:15,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 586.2ms TimeCoverageRelationStatistics Valid=767, Invalid=1989, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:23:15,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-05 18:23:15,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3153. [2021-06-05 18:23:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7262055837563453) internal successors, (8593), 3152 states have internal predecessors, (8593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8593 transitions. [2021-06-05 18:23:15,231 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8593 transitions. Word has length 140 [2021-06-05 18:23:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:15,231 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8593 transitions. [2021-06-05 18:23:15,231 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) [2021-06-05 18:23:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8593 transitions. [2021-06-05 18:23:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:15,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:15,233 INFO L554 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] [2021-06-05 18:23:15,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 18:23:15,434 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:15,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1770339288, now seen corresponding path program 228 times [2021-06-05 18:23:15,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:15,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423752427] [2021-06-05 18:23:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:15,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423752427] [2021-06-05 18:23:15,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423752427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:15,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718306689] [2021-06-05 18:23:15,721 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 [2021-06-05 18:23:15,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:23:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:15,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:16,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718306689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:16,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:16,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:16,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668434078] [2021-06-05 18:23:16,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:16,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:16,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:16,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:16,035 INFO L87 Difference]: Start difference. First operand 3153 states and 8593 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:16,581 INFO L93 Difference]: Finished difference Result 5096 states and 12682 transitions. [2021-06-05 18:23:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:16,581 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 [2021-06-05 18:23:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:16,586 INFO L225 Difference]: With dead ends: 5096 [2021-06-05 18:23:16,586 INFO L226 Difference]: Without dead ends: 4826 [2021-06-05 18:23:16,587 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 672.4ms TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:23:16,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-05 18:23:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 3228. [2021-06-05 18:23:16,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.732568949488689) internal successors, (8818), 3227 states have internal predecessors, (8818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8818 transitions. [2021-06-05 18:23:16,622 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8818 transitions. Word has length 140 [2021-06-05 18:23:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:16,622 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8818 transitions. [2021-06-05 18:23:16,622 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) [2021-06-05 18:23:16,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8818 transitions. [2021-06-05 18:23:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:16,624 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:16,624 INFO L554 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] [2021-06-05 18:23:16,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:16,825 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash -888780106, now seen corresponding path program 229 times [2021-06-05 18:23:16,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205506033] [2021-06-05 18:23:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:17,083 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:17,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:17,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205506033] [2021-06-05 18:23:17,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205506033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:17,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762564212] [2021-06-05 18:23:17,083 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 [2021-06-05 18:23:17,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:17,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:17,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:17,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762564212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:17,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:17,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:17,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850190593] [2021-06-05 18:23:17,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:17,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:17,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:17,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:17,338 INFO L87 Difference]: Start difference. First operand 3228 states and 8818 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:17,833 INFO L93 Difference]: Finished difference Result 5146 states and 12857 transitions. [2021-06-05 18:23:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:23:17,833 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 [2021-06-05 18:23:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:17,838 INFO L225 Difference]: With dead ends: 5146 [2021-06-05 18:23:17,838 INFO L226 Difference]: Without dead ends: 4876 [2021-06-05 18:23:17,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=769, Invalid=2201, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:23:17,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-05 18:23:17,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 3303. [2021-06-05 18:23:17,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.7386432465172623) internal successors, (9043), 3302 states have internal predecessors, (9043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:17,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9043 transitions. [2021-06-05 18:23:17,870 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9043 transitions. Word has length 140 [2021-06-05 18:23:17,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:17,870 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9043 transitions. [2021-06-05 18:23:17,870 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) [2021-06-05 18:23:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9043 transitions. [2021-06-05 18:23:17,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:17,872 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:17,872 INFO L554 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] [2021-06-05 18:23:18,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 18:23:18,073 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:18,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:18,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1531154522, now seen corresponding path program 230 times [2021-06-05 18:23:18,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:18,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134708153] [2021-06-05 18:23:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:18,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134708153] [2021-06-05 18:23:18,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134708153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:18,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415194976] [2021-06-05 18:23:18,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:23:18,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:18,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:18,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:18,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:18,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415194976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:18,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:18,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614809698] [2021-06-05 18:23:18,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:18,650 INFO L87 Difference]: Start difference. First operand 3303 states and 9043 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:19,243 INFO L93 Difference]: Finished difference Result 5171 states and 12982 transitions. [2021-06-05 18:23:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:19,244 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 [2021-06-05 18:23:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:19,248 INFO L225 Difference]: With dead ends: 5171 [2021-06-05 18:23:19,249 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 18:23:19,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 726.7ms TimeCoverageRelationStatistics Valid=850, Invalid=2572, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:23:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 18:23:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3378. [2021-06-05 18:23:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.744447734675748) internal successors, (9268), 3377 states have internal predecessors, (9268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9268 transitions. [2021-06-05 18:23:19,284 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9268 transitions. Word has length 140 [2021-06-05 18:23:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:19,284 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9268 transitions. [2021-06-05 18:23:19,284 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) [2021-06-05 18:23:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9268 transitions. [2021-06-05 18:23:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:19,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:19,287 INFO L554 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] [2021-06-05 18:23:19,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:19,487 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:19,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1577701452, now seen corresponding path program 231 times [2021-06-05 18:23:19,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:19,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268641483] [2021-06-05 18:23:19,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:19,783 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:19,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:19,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268641483] [2021-06-05 18:23:19,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268641483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:19,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480344424] [2021-06-05 18:23:19,784 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 [2021-06-05 18:23:19,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:23:19,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:19,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:20,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480344424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:20,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:20,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507127373] [2021-06-05 18:23:20,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:20,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:20,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:20,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:20,076 INFO L87 Difference]: Start difference. First operand 3378 states and 9268 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:20,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:20,605 INFO L93 Difference]: Finished difference Result 5196 states and 13107 transitions. [2021-06-05 18:23:20,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:23:20,605 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 [2021-06-05 18:23:20,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:20,611 INFO L225 Difference]: With dead ends: 5196 [2021-06-05 18:23:20,611 INFO L226 Difference]: Without dead ends: 4926 [2021-06-05 18:23:20,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:23:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-05 18:23:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 3453. [2021-06-05 18:23:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.75) internal successors, (9493), 3452 states have internal predecessors, (9493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9493 transitions. [2021-06-05 18:23:20,651 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9493 transitions. Word has length 140 [2021-06-05 18:23:20,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:20,651 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9493 transitions. [2021-06-05 18:23:20,651 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) [2021-06-05 18:23:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9493 transitions. [2021-06-05 18:23:20,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:20,654 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:20,654 INFO L554 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] [2021-06-05 18:23:20,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 18:23:20,855 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:20,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1798881444, now seen corresponding path program 232 times [2021-06-05 18:23:20,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:20,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012432568] [2021-06-05 18:23:20,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:21,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012432568] [2021-06-05 18:23:21,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012432568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:21,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232834427] [2021-06-05 18:23:21,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:23:21,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:21,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:21,401 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:21,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232834427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:21,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:21,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:21,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644308840] [2021-06-05 18:23:21,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:21,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:21,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:21,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:21,402 INFO L87 Difference]: Start difference. First operand 3453 states and 9493 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:22,058 INFO L93 Difference]: Finished difference Result 5221 states and 13232 transitions. [2021-06-05 18:23:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:22,058 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 [2021-06-05 18:23:22,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:22,064 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 18:23:22,064 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 18:23:22,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 734.6ms TimeCoverageRelationStatistics Valid=876, Invalid=2784, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:23:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 18:23:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3528. [2021-06-05 18:23:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.755316132690672) internal successors, (9718), 3527 states have internal predecessors, (9718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9718 transitions. [2021-06-05 18:23:22,107 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9718 transitions. Word has length 140 [2021-06-05 18:23:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:22,107 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9718 transitions. [2021-06-05 18:23:22,107 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) [2021-06-05 18:23:22,107 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9718 transitions. [2021-06-05 18:23:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:22,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:22,110 INFO L554 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] [2021-06-05 18:23:22,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:22,311 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:22,311 INFO L82 PathProgramCache]: Analyzing trace with hash 22190642, now seen corresponding path program 233 times [2021-06-05 18:23:22,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:22,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489912204] [2021-06-05 18:23:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:22,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:22,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489912204] [2021-06-05 18:23:22,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489912204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:22,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145303278] [2021-06-05 18:23:22,555 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 [2021-06-05 18:23:22,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:23:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:22,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:22,809 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:22,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145303278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:22,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:22,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:22,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388640896] [2021-06-05 18:23:22,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:22,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:22,810 INFO L87 Difference]: Start difference. First operand 3528 states and 9718 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:23,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:23,426 INFO L93 Difference]: Finished difference Result 5246 states and 13357 transitions. [2021-06-05 18:23:23,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:23,426 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 [2021-06-05 18:23:23,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:23,431 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 18:23:23,431 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 18:23:23,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 677.0ms TimeCoverageRelationStatistics Valid=821, Invalid=2601, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:23:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 18:23:23,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3603. [2021-06-05 18:23:23,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3603 states, 3602 states have (on average 2.7604108828428653) internal successors, (9943), 3602 states have internal predecessors, (9943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3603 states to 3603 states and 9943 transitions. [2021-06-05 18:23:23,475 INFO L78 Accepts]: Start accepts. Automaton has 3603 states and 9943 transitions. Word has length 140 [2021-06-05 18:23:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:23,475 INFO L482 AbstractCegarLoop]: Abstraction has 3603 states and 9943 transitions. [2021-06-05 18:23:23,475 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) [2021-06-05 18:23:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3603 states and 9943 transitions. [2021-06-05 18:23:23,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:23,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:23,479 INFO L554 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] [2021-06-05 18:23:23,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:23,679 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:23,679 INFO L82 PathProgramCache]: Analyzing trace with hash 2121832226, now seen corresponding path program 234 times [2021-06-05 18:23:23,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:23,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738424841] [2021-06-05 18:23:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:23,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738424841] [2021-06-05 18:23:23,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738424841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628531318] [2021-06-05 18:23:23,941 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 [2021-06-05 18:23:24,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:23:24,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:24,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:24,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:24,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628531318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:24,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:24,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:24,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643569190] [2021-06-05 18:23:24,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:24,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:24,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:24,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:24,221 INFO L87 Difference]: Start difference. First operand 3603 states and 9943 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:24,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:24,954 INFO L93 Difference]: Finished difference Result 5271 states and 13482 transitions. [2021-06-05 18:23:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:23:24,955 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 [2021-06-05 18:23:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:24,960 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 18:23:24,961 INFO L226 Difference]: Without dead ends: 5001 [2021-06-05 18:23:24,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=918, Invalid=2988, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:23:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-05 18:23:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3678. [2021-06-05 18:23:25,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3678 states, 3677 states have (on average 2.7652977971172152) internal successors, (10168), 3677 states have internal predecessors, (10168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3678 states to 3678 states and 10168 transitions. [2021-06-05 18:23:25,010 INFO L78 Accepts]: Start accepts. Automaton has 3678 states and 10168 transitions. Word has length 140 [2021-06-05 18:23:25,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:25,011 INFO L482 AbstractCegarLoop]: Abstraction has 3678 states and 10168 transitions. [2021-06-05 18:23:25,011 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) [2021-06-05 18:23:25,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3678 states and 10168 transitions. [2021-06-05 18:23:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:25,014 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:25,014 INFO L554 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] [2021-06-05 18:23:25,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:25,214 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:25,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:25,215 INFO L82 PathProgramCache]: Analyzing trace with hash -662934992, now seen corresponding path program 235 times [2021-06-05 18:23:25,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:25,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455588507] [2021-06-05 18:23:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:25,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:25,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455588507] [2021-06-05 18:23:25,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455588507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:25,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479160069] [2021-06-05 18:23:25,460 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 [2021-06-05 18:23:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:25,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:25,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479160069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:25,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:25,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:25,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807481592] [2021-06-05 18:23:25,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:25,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:25,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:25,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:25,701 INFO L87 Difference]: Start difference. First operand 3678 states and 10168 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:26,333 INFO L93 Difference]: Finished difference Result 5296 states and 13607 transitions. [2021-06-05 18:23:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:23:26,333 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 [2021-06-05 18:23:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:26,339 INFO L225 Difference]: With dead ends: 5296 [2021-06-05 18:23:26,339 INFO L226 Difference]: Without dead ends: 5026 [2021-06-05 18:23:26,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 683.2ms TimeCoverageRelationStatistics Valid=871, Invalid=2789, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:23:26,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-05 18:23:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3753. [2021-06-05 18:23:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 2.76998933901919) internal successors, (10393), 3752 states have internal predecessors, (10393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:26,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 10393 transitions. [2021-06-05 18:23:26,385 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 10393 transitions. Word has length 140 [2021-06-05 18:23:26,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:26,385 INFO L482 AbstractCegarLoop]: Abstraction has 3753 states and 10393 transitions. [2021-06-05 18:23:26,386 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) [2021-06-05 18:23:26,386 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 10393 transitions. [2021-06-05 18:23:26,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:26,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:26,389 INFO L554 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] [2021-06-05 18:23:26,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 18:23:26,589 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:26,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:26,590 INFO L82 PathProgramCache]: Analyzing trace with hash -23276768, now seen corresponding path program 236 times [2021-06-05 18:23:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:26,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823235578] [2021-06-05 18:23:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:26,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:26,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823235578] [2021-06-05 18:23:26,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823235578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:26,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539316527] [2021-06-05 18:23:26,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:23:26,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:26,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:27,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539316527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:27,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:27,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:27,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815682041] [2021-06-05 18:23:27,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:27,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:27,093 INFO L87 Difference]: Start difference. First operand 3753 states and 10393 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:27,878 INFO L93 Difference]: Finished difference Result 5321 states and 13732 transitions. [2021-06-05 18:23:27,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:23:27,879 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 [2021-06-05 18:23:27,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:27,884 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 18:23:27,884 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 18:23:27,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 818.2ms TimeCoverageRelationStatistics Valid=976, Invalid=3184, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 18:23:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3828. [2021-06-05 18:23:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.7744969950352756) internal successors, (10618), 3827 states have internal predecessors, (10618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 10618 transitions. [2021-06-05 18:23:27,929 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 10618 transitions. Word has length 140 [2021-06-05 18:23:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:27,929 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 10618 transitions. [2021-06-05 18:23:27,929 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) [2021-06-05 18:23:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 10618 transitions. [2021-06-05 18:23:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:27,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:27,933 INFO L554 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] [2021-06-05 18:23:28,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-06-05 18:23:28,133 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:28,133 INFO L82 PathProgramCache]: Analyzing trace with hash -798195794, now seen corresponding path program 237 times [2021-06-05 18:23:28,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:28,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616466578] [2021-06-05 18:23:28,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:28,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616466578] [2021-06-05 18:23:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616466578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441878063] [2021-06-05 18:23:28,394 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 [2021-06-05 18:23:28,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:23:28,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:28,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441878063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:28,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:28,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:28,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517815772] [2021-06-05 18:23:28,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:28,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:28,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:28,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:28,747 INFO L87 Difference]: Start difference. First operand 3828 states and 10618 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:29,444 INFO L93 Difference]: Finished difference Result 5346 states and 13857 transitions. [2021-06-05 18:23:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:23:29,444 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 [2021-06-05 18:23:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:29,449 INFO L225 Difference]: With dead ends: 5346 [2021-06-05 18:23:29,449 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 18:23:29,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 722.7ms TimeCoverageRelationStatistics Valid=937, Invalid=2969, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:23:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 18:23:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3903. [2021-06-05 18:23:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.7788313685289596) internal successors, (10843), 3902 states have internal predecessors, (10843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:29,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10843 transitions. [2021-06-05 18:23:29,497 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10843 transitions. Word has length 140 [2021-06-05 18:23:29,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:29,497 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10843 transitions. [2021-06-05 18:23:29,497 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) [2021-06-05 18:23:29,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10843 transitions. [2021-06-05 18:23:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:29,500 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:29,500 INFO L554 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] [2021-06-05 18:23:29,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 18:23:29,701 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:29,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1252109154, now seen corresponding path program 238 times [2021-06-05 18:23:29,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:29,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256783824] [2021-06-05 18:23:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:29,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:29,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256783824] [2021-06-05 18:23:29,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256783824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:29,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362515205] [2021-06-05 18:23:29,939 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 [2021-06-05 18:23:30,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:30,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:30,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:30,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:30,196 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:30,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362515205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:30,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:30,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:30,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597500133] [2021-06-05 18:23:30,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:30,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:30,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:30,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:30,197 INFO L87 Difference]: Start difference. First operand 3903 states and 10843 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:31,063 INFO L93 Difference]: Finished difference Result 5371 states and 13982 transitions. [2021-06-05 18:23:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:23:31,064 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 [2021-06-05 18:23:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:31,068 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 18:23:31,069 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 18:23:31,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 995 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=1050, Invalid=3372, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:23:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 18:23:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3978. [2021-06-05 18:23:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3978 states, 3977 states have (on average 2.783002263012321) internal successors, (11068), 3977 states have internal predecessors, (11068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3978 states to 3978 states and 11068 transitions. [2021-06-05 18:23:31,118 INFO L78 Accepts]: Start accepts. Automaton has 3978 states and 11068 transitions. Word has length 140 [2021-06-05 18:23:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:31,118 INFO L482 AbstractCegarLoop]: Abstraction has 3978 states and 11068 transitions. [2021-06-05 18:23:31,118 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) [2021-06-05 18:23:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3978 states and 11068 transitions. [2021-06-05 18:23:31,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:31,121 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:31,122 INFO L554 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] [2021-06-05 18:23:31,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 18:23:31,322 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash -374097236, now seen corresponding path program 239 times [2021-06-05 18:23:31,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:31,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791089856] [2021-06-05 18:23:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:31,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:31,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:31,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791089856] [2021-06-05 18:23:31,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791089856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:31,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520991776] [2021-06-05 18:23:31,541 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 [2021-06-05 18:23:31,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:23:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:31,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520991776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:31,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:31,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:31,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223137865] [2021-06-05 18:23:31,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:31,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:31,789 INFO L87 Difference]: Start difference. First operand 3978 states and 11068 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:32,506 INFO L93 Difference]: Finished difference Result 5396 states and 14107 transitions. [2021-06-05 18:23:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:23:32,506 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 [2021-06-05 18:23:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:32,512 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 18:23:32,512 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 18:23:32,512 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=1019, Invalid=3141, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:23:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 18:23:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4053. [2021-06-05 18:23:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4052 states have (on average 2.7870187561697928) internal successors, (11293), 4052 states have internal predecessors, (11293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 11293 transitions. [2021-06-05 18:23:32,558 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 11293 transitions. Word has length 140 [2021-06-05 18:23:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:32,558 INFO L482 AbstractCegarLoop]: Abstraction has 4053 states and 11293 transitions. [2021-06-05 18:23:32,559 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) [2021-06-05 18:23:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 11293 transitions. [2021-06-05 18:23:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:32,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:32,562 INFO L554 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] [2021-06-05 18:23:32,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 18:23:32,762 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:32,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1274152036, now seen corresponding path program 240 times [2021-06-05 18:23:32,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:32,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557835200] [2021-06-05 18:23:32,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:32,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557835200] [2021-06-05 18:23:32,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557835200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015356580] [2021-06-05 18:23:32,992 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 [2021-06-05 18:23:33,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:23:33,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:33,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:33,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:33,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015356580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:33,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:33,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:33,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898248788] [2021-06-05 18:23:33,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:33,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:33,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:33,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:33,275 INFO L87 Difference]: Start difference. First operand 4053 states and 11293 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:34,217 INFO L93 Difference]: Finished difference Result 5421 states and 14232 transitions. [2021-06-05 18:23:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:23:34,218 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 [2021-06-05 18:23:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:34,224 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 18:23:34,224 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 18:23:34,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=1140, Invalid=3552, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:23:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 18:23:34,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4128. [2021-06-05 18:23:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.790889265810516) internal successors, (11518), 4127 states have internal predecessors, (11518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11518 transitions. [2021-06-05 18:23:34,280 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11518 transitions. Word has length 140 [2021-06-05 18:23:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:34,280 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11518 transitions. [2021-06-05 18:23:34,280 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) [2021-06-05 18:23:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11518 transitions. [2021-06-05 18:23:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:34,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:34,284 INFO L554 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] [2021-06-05 18:23:34,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:34,484 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1703216342, now seen corresponding path program 241 times [2021-06-05 18:23:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:34,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981263340] [2021-06-05 18:23:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:34,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981263340] [2021-06-05 18:23:34,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981263340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:34,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881970040] [2021-06-05 18:23:34,708 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 [2021-06-05 18:23:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:34,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:34,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:34,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881970040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:34,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:34,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:34,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582316135] [2021-06-05 18:23:34,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:34,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:34,946 INFO L87 Difference]: Start difference. First operand 4128 states and 11518 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:35,754 INFO L93 Difference]: Finished difference Result 5446 states and 14357 transitions. [2021-06-05 18:23:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:23:35,754 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 [2021-06-05 18:23:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:35,760 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:23:35,760 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:23:35,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 765.3ms TimeCoverageRelationStatistics Valid=1117, Invalid=3305, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:23:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:23:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4203. [2021-06-05 18:23:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 4202 states have (on average 2.7946216087577342) internal successors, (11743), 4202 states have internal predecessors, (11743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:35,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 11743 transitions. [2021-06-05 18:23:35,813 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 11743 transitions. Word has length 140 [2021-06-05 18:23:35,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:35,813 INFO L482 AbstractCegarLoop]: Abstraction has 4203 states and 11743 transitions. [2021-06-05 18:23:35,813 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) [2021-06-05 18:23:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 11743 transitions. [2021-06-05 18:23:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:35,816 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:35,816 INFO L554 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] [2021-06-05 18:23:36,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 18:23:36,021 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:36,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1905567770, now seen corresponding path program 242 times [2021-06-05 18:23:36,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:36,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867008295] [2021-06-05 18:23:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867008295] [2021-06-05 18:23:36,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867008295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:36,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496204134] [2021-06-05 18:23:36,271 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 [2021-06-05 18:23:36,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:36,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:36,533 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:36,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496204134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:36,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:36,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:36,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153029063] [2021-06-05 18:23:36,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:36,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:36,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:36,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:36,534 INFO L87 Difference]: Start difference. First operand 4203 states and 11743 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:37,526 INFO L93 Difference]: Finished difference Result 5471 states and 14482 transitions. [2021-06-05 18:23:37,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:23:37,526 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 [2021-06-05 18:23:37,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:37,532 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 18:23:37,532 INFO L226 Difference]: Without dead ends: 5201 [2021-06-05 18:23:37,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 957.2ms TimeCoverageRelationStatistics Valid=1246, Invalid=3724, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:23:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-05 18:23:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4278. [2021-06-05 18:23:37,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4278 states, 4277 states have (on average 2.7982230535422024) internal successors, (11968), 4277 states have internal predecessors, (11968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4278 states to 4278 states and 11968 transitions. [2021-06-05 18:23:37,585 INFO L78 Accepts]: Start accepts. Automaton has 4278 states and 11968 transitions. Word has length 140 [2021-06-05 18:23:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:37,585 INFO L482 AbstractCegarLoop]: Abstraction has 4278 states and 11968 transitions. [2021-06-05 18:23:37,585 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) [2021-06-05 18:23:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4278 states and 11968 transitions. [2021-06-05 18:23:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:37,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:37,589 INFO L554 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] [2021-06-05 18:23:37,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:37,789 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:37,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:37,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1820533032, now seen corresponding path program 243 times [2021-06-05 18:23:37,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:37,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223378133] [2021-06-05 18:23:37,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:38,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223378133] [2021-06-05 18:23:38,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223378133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:38,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122144459] [2021-06-05 18:23:38,022 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 [2021-06-05 18:23:38,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:23:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:38,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:38,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122144459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:38,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:38,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:38,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698275622] [2021-06-05 18:23:38,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:38,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:38,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:38,277 INFO L87 Difference]: Start difference. First operand 4278 states and 11968 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:39,088 INFO L93 Difference]: Finished difference Result 5496 states and 14607 transitions. [2021-06-05 18:23:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:23:39,088 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 [2021-06-05 18:23:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:39,093 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:23:39,093 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:23:39,093 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 804.0ms TimeCoverageRelationStatistics Valid=1231, Invalid=3461, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:23:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:23:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4353. [2021-06-05 18:23:39,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4353 states, 4352 states have (on average 2.801700367647059) internal successors, (12193), 4352 states have internal predecessors, (12193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4353 states to 4353 states and 12193 transitions. [2021-06-05 18:23:39,147 INFO L78 Accepts]: Start accepts. Automaton has 4353 states and 12193 transitions. Word has length 140 [2021-06-05 18:23:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:39,147 INFO L482 AbstractCegarLoop]: Abstraction has 4353 states and 12193 transitions. [2021-06-05 18:23:39,147 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) [2021-06-05 18:23:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 4353 states and 12193 transitions. [2021-06-05 18:23:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:39,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:39,151 INFO L554 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] [2021-06-05 18:23:39,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:39,351 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:39,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1752381976, now seen corresponding path program 244 times [2021-06-05 18:23:39,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:39,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328261724] [2021-06-05 18:23:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:39,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:39,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328261724] [2021-06-05 18:23:39,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328261724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:39,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182214945] [2021-06-05 18:23:39,578 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 [2021-06-05 18:23:39,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:39,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:39,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182214945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:39,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:39,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:39,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577218510] [2021-06-05 18:23:39,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:39,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:39,834 INFO L87 Difference]: Start difference. First operand 4353 states and 12193 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:40,854 INFO L93 Difference]: Finished difference Result 5521 states and 14732 transitions. [2021-06-05 18:23:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:23:40,854 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 [2021-06-05 18:23:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:40,860 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 18:23:40,860 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 18:23:40,861 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=1368, Invalid=3888, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:23:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 18:23:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4428. [2021-06-05 18:23:40,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4428 states, 4427 states have (on average 2.805059859950305) internal successors, (12418), 4427 states have internal predecessors, (12418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4428 states to 4428 states and 12418 transitions. [2021-06-05 18:23:40,938 INFO L78 Accepts]: Start accepts. Automaton has 4428 states and 12418 transitions. Word has length 140 [2021-06-05 18:23:40,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:40,938 INFO L482 AbstractCegarLoop]: Abstraction has 4428 states and 12418 transitions. [2021-06-05 18:23:40,938 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) [2021-06-05 18:23:40,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4428 states and 12418 transitions. [2021-06-05 18:23:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:40,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:40,942 INFO L554 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] [2021-06-05 18:23:41,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:41,142 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:41,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:41,143 INFO L82 PathProgramCache]: Analyzing trace with hash 455412902, now seen corresponding path program 245 times [2021-06-05 18:23:41,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:41,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005341587] [2021-06-05 18:23:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:41,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005341587] [2021-06-05 18:23:41,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005341587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:41,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016523976] [2021-06-05 18:23:41,389 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 [2021-06-05 18:23:41,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:23:41,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:41,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:41,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016523976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:41,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102240224] [2021-06-05 18:23:41,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:41,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:41,635 INFO L87 Difference]: Start difference. First operand 4428 states and 12418 transitions. Second operand has 28 states, 28 states have (on average 5.071428571428571) internal successors, (142), 28 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:42,478 INFO L93 Difference]: Finished difference Result 5591 states and 14977 transitions. [2021-06-05 18:23:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:23:42,479 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 [2021-06-05 18:23:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:42,484 INFO L225 Difference]: With dead ends: 5591 [2021-06-05 18:23:42,484 INFO L226 Difference]: Without dead ends: 5321 [2021-06-05 18:23:42,485 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 843.0ms TimeCoverageRelationStatistics Valid=1361, Invalid=3609, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:23:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5321 states. [2021-06-05 18:23:42,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5321 to 4503. [2021-06-05 18:23:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4503 states, 4502 states have (on average 2.8116392714349177) internal successors, (12658), 4502 states have internal predecessors, (12658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 12658 transitions. [2021-06-05 18:23:42,546 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 12658 transitions. Word has length 140 [2021-06-05 18:23:42,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:42,546 INFO L482 AbstractCegarLoop]: Abstraction has 4503 states and 12658 transitions. [2021-06-05 18:23:42,546 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) [2021-06-05 18:23:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 12658 transitions. [2021-06-05 18:23:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:42,550 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:42,550 INFO L554 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] [2021-06-05 18:23:42,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:42,751 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:42,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:42,751 INFO L82 PathProgramCache]: Analyzing trace with hash 885166486, now seen corresponding path program 246 times [2021-06-05 18:23:42,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:42,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783874099] [2021-06-05 18:23:42,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:42,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783874099] [2021-06-05 18:23:42,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783874099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:42,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741058257] [2021-06-05 18:23:42,973 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 [2021-06-05 18:23:43,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:23:43,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:43,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741058257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:43,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:43,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:43,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065173790] [2021-06-05 18:23:43,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:43,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:43,238 INFO L87 Difference]: Start difference. First operand 4503 states and 12658 transitions. Second operand has 29 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:23:44,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:44,403 INFO L93 Difference]: Finished difference Result 6169 states and 16603 transitions. [2021-06-05 18:23:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:23:44,404 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 [2021-06-05 18:23:44,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:44,409 INFO L225 Difference]: With dead ends: 6169 [2021-06-05 18:23:44,409 INFO L226 Difference]: Without dead ends: 5546 [2021-06-05 18:23:44,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1094.4ms TimeCoverageRelationStatistics Valid=1529, Invalid=4323, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:23:44,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5546 states. [2021-06-05 18:23:44,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5546 to 4578. [2021-06-05 18:23:44,451 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) [2021-06-05 18:23:44,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 12888 transitions. [2021-06-05 18:23:44,457 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 12888 transitions. Word has length 140 [2021-06-05 18:23:44,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:44,457 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 12888 transitions. [2021-06-05 18:23:44,457 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) [2021-06-05 18:23:44,458 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 12888 transitions. [2021-06-05 18:23:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:44,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:44,462 INFO L554 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] [2021-06-05 18:23:44,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 18:23:44,664 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash 827432356, now seen corresponding path program 247 times [2021-06-05 18:23:44,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:44,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780212326] [2021-06-05 18:23:44,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:44,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:44,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:44,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780212326] [2021-06-05 18:23:44,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780212326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:44,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93134036] [2021-06-05 18:23:44,888 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 [2021-06-05 18:23:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:44,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:44,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:45,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93134036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:45,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:45,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-06-05 18:23:45,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942863993] [2021-06-05 18:23:45,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:23:45,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:45,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:23:45,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:23:45,122 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) [2021-06-05 18:23:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:46,003 INFO L93 Difference]: Finished difference Result 6398 states and 17321 transitions. [2021-06-05 18:23:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:23:46,004 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 [2021-06-05 18:23:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:46,010 INFO L225 Difference]: With dead ends: 6398 [2021-06-05 18:23:46,010 INFO L226 Difference]: Without dead ends: 6128 [2021-06-05 18:23:46,011 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=1508, Invalid=3748, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:23:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6128 states. [2021-06-05 18:23:46,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6128 to 4758. [2021-06-05 18:23:46,077 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) [2021-06-05 18:23:46,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4758 states to 4758 states and 13447 transitions. [2021-06-05 18:23:46,083 INFO L78 Accepts]: Start accepts. Automaton has 4758 states and 13447 transitions. Word has length 140 [2021-06-05 18:23:46,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:46,083 INFO L482 AbstractCegarLoop]: Abstraction has 4758 states and 13447 transitions. [2021-06-05 18:23:46,083 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) [2021-06-05 18:23:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4758 states and 13447 transitions. [2021-06-05 18:23:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-06-05 18:23:46,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:46,087 INFO L554 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] [2021-06-05 18:23:46,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 18:23:46,290 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:46,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:46,290 INFO L82 PathProgramCache]: Analyzing trace with hash 849775606, now seen corresponding path program 248 times [2021-06-05 18:23:46,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:46,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462465596] [2021-06-05 18:23:46,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:46,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:46,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462465596] [2021-06-05 18:23:46,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462465596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:46,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336191804] [2021-06-05 18:23:46,511 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 [2021-06-05 18:23:46,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:23:46,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:46,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336191804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:46,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:46,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-06-05 18:23:46,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409604195] [2021-06-05 18:23:46,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:46,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:46,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:46,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:46,760 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) [2021-06-05 18:23:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:47,920 INFO L93 Difference]: Finished difference Result 6221 states and 16821 transitions. [2021-06-05 18:23:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:23:47,920 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 [2021-06-05 18:23:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:47,926 INFO L225 Difference]: With dead ends: 6221 [2021-06-05 18:23:47,927 INFO L226 Difference]: Without dead ends: 5646 [2021-06-05 18:23:47,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 1136.3ms TimeCoverageRelationStatistics Valid=1708, Invalid=4612, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:23:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-05 18:23:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 3203. [2021-06-05 18:23:47,965 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) [2021-06-05 18:23:47,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8768 transitions. [2021-06-05 18:23:47,969 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8768 transitions. Word has length 140 [2021-06-05 18:23:47,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:47,969 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8768 transitions. [2021-06-05 18:23:47,970 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) [2021-06-05 18:23:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8768 transitions. [2021-06-05 18:23:47,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:47,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:47,972 INFO L554 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] [2021-06-05 18:23:48,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 18:23:48,174 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:48,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:48,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1739326839, now seen corresponding path program 249 times [2021-06-05 18:23:48,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:48,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702734410] [2021-06-05 18:23:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:48,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:48,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702734410] [2021-06-05 18:23:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702734410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902038033] [2021-06-05 18:23:48,474 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 [2021-06-05 18:23:48,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:23:48,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:48,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:48,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:48,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902038033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:48,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:48,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:23:48,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514588530] [2021-06-05 18:23:48,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:48,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:48,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:48,775 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) [2021-06-05 18:23:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:49,311 INFO L93 Difference]: Finished difference Result 4721 states and 12007 transitions. [2021-06-05 18:23:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:23:49,311 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 [2021-06-05 18:23:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:49,316 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:23:49,316 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:23:49,316 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 645.5ms TimeCoverageRelationStatistics Valid=844, Invalid=2348, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:23:49,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:23:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3278. [2021-06-05 18:23:49,350 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) [2021-06-05 18:23:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 8993 transitions. [2021-06-05 18:23:49,354 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 8993 transitions. Word has length 145 [2021-06-05 18:23:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:49,355 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 8993 transitions. [2021-06-05 18:23:49,355 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) [2021-06-05 18:23:49,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 8993 transitions. [2021-06-05 18:23:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:49,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:49,357 INFO L554 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] [2021-06-05 18:23:49,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 18:23:49,558 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:49,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:49,558 INFO L82 PathProgramCache]: Analyzing trace with hash 102019961, now seen corresponding path program 250 times [2021-06-05 18:23:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:49,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336471632] [2021-06-05 18:23:49,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:49,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336471632] [2021-06-05 18:23:49,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336471632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:49,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755077091] [2021-06-05 18:23:49,857 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 [2021-06-05 18:23:49,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:50,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755077091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:50,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:50,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:23:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903661014] [2021-06-05 18:23:50,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:23:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:23:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:23:50,153 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) [2021-06-05 18:23:50,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:50,754 INFO L93 Difference]: Finished difference Result 5291 states and 13222 transitions. [2021-06-05 18:23:50,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:23:50,754 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 [2021-06-05 18:23:50,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:50,758 INFO L225 Difference]: With dead ends: 5291 [2021-06-05 18:23:50,759 INFO L226 Difference]: Without dead ends: 5021 [2021-06-05 18:23:50,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 711.0ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:23:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-05 18:23:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 3353. [2021-06-05 18:23:50,792 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) [2021-06-05 18:23:50,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9218 transitions. [2021-06-05 18:23:50,796 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9218 transitions. Word has length 145 [2021-06-05 18:23:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:50,796 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9218 transitions. [2021-06-05 18:23:50,796 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) [2021-06-05 18:23:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9218 transitions. [2021-06-05 18:23:50,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:50,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:50,798 INFO L554 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] [2021-06-05 18:23:50,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:50,999 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 983579143, now seen corresponding path program 251 times [2021-06-05 18:23:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:50,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646506132] [2021-06-05 18:23:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:51,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646506132] [2021-06-05 18:23:51,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646506132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:51,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823875998] [2021-06-05 18:23:51,297 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 [2021-06-05 18:23:51,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:23:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823875998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:51,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:51,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:23:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436590345] [2021-06-05 18:23:51,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:51,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:51,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:51,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:51,568 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) [2021-06-05 18:23:52,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:52,128 INFO L93 Difference]: Finished difference Result 5321 states and 13357 transitions. [2021-06-05 18:23:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:23:52,128 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 [2021-06-05 18:23:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:52,133 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 18:23:52,133 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 18:23:52,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:23:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 18:23:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3428. [2021-06-05 18:23:52,166 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) [2021-06-05 18:23:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9443 transitions. [2021-06-05 18:23:52,170 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9443 transitions. Word has length 145 [2021-06-05 18:23:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:52,170 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9443 transitions. [2021-06-05 18:23:52,170 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) [2021-06-05 18:23:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9443 transitions. [2021-06-05 18:23:52,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:52,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:52,173 INFO L554 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] [2021-06-05 18:23:52,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 18:23:52,374 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:52,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:52,374 INFO L82 PathProgramCache]: Analyzing trace with hash 341204727, now seen corresponding path program 252 times [2021-06-05 18:23:52,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:52,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036368718] [2021-06-05 18:23:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:52,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036368718] [2021-06-05 18:23:52,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036368718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:52,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852208877] [2021-06-05 18:23:52,664 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 [2021-06-05 18:23:52,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:23:52,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:52,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:52,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852208877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:52,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:52,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:23:52,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600990301] [2021-06-05 18:23:52,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:23:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:23:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:23:52,965 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) [2021-06-05 18:23:53,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:53,625 INFO L93 Difference]: Finished difference Result 5346 states and 13482 transitions. [2021-06-05 18:23:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:23:53,626 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 [2021-06-05 18:23:53,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:53,629 INFO L225 Difference]: With dead ends: 5346 [2021-06-05 18:23:53,630 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 18:23:53,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=922, Invalid=2860, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:23:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 18:23:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 3503. [2021-06-05 18:23:53,662 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) [2021-06-05 18:23:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9668 transitions. [2021-06-05 18:23:53,666 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9668 transitions. Word has length 145 [2021-06-05 18:23:53,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:53,666 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9668 transitions. [2021-06-05 18:23:53,666 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) [2021-06-05 18:23:53,666 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9668 transitions. [2021-06-05 18:23:53,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:53,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:53,669 INFO L554 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] [2021-06-05 18:23:53,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:53,871 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:53,872 INFO L82 PathProgramCache]: Analyzing trace with hash 294657797, now seen corresponding path program 253 times [2021-06-05 18:23:53,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:53,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048030185] [2021-06-05 18:23:53,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:54,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048030185] [2021-06-05 18:23:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048030185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:54,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127189490] [2021-06-05 18:23:54,136 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 [2021-06-05 18:23:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:54,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:54,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127189490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:54,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:54,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:23:54,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254674515] [2021-06-05 18:23:54,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:54,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:54,399 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) [2021-06-05 18:23:55,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:55,008 INFO L93 Difference]: Finished difference Result 5371 states and 13607 transitions. [2021-06-05 18:23:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:23:55,009 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 [2021-06-05 18:23:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:55,014 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 18:23:55,014 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 18:23:55,014 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 689.9ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:23:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 18:23:55,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3578. [2021-06-05 18:23:55,052 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) [2021-06-05 18:23:55,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9893 transitions. [2021-06-05 18:23:55,056 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9893 transitions. Word has length 145 [2021-06-05 18:23:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:55,056 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9893 transitions. [2021-06-05 18:23:55,056 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) [2021-06-05 18:23:55,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9893 transitions. [2021-06-05 18:23:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:55,059 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:55,059 INFO L554 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] [2021-06-05 18:23:55,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:55,261 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -623726603, now seen corresponding path program 254 times [2021-06-05 18:23:55,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:55,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138748534] [2021-06-05 18:23:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:55,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:55,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138748534] [2021-06-05 18:23:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138748534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:55,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358973707] [2021-06-05 18:23:55,543 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 [2021-06-05 18:23:55,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:23:55,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:55,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358973707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:55,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:55,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:23:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832586529] [2021-06-05 18:23:55,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:23:55,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:55,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:23:55,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:23:55,818 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) [2021-06-05 18:23:56,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:56,562 INFO L93 Difference]: Finished difference Result 5396 states and 13732 transitions. [2021-06-05 18:23:56,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:23:56,562 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 [2021-06-05 18:23:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:56,567 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 18:23:56,567 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 18:23:56,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 812.8ms TimeCoverageRelationStatistics Valid=955, Invalid=3077, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:23:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 18:23:56,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3653. [2021-06-05 18:23:56,605 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) [2021-06-05 18:23:56,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10118 transitions. [2021-06-05 18:23:56,610 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10118 transitions. Word has length 145 [2021-06-05 18:23:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:56,610 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10118 transitions. [2021-06-05 18:23:56,610 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) [2021-06-05 18:23:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10118 transitions. [2021-06-05 18:23:56,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:56,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:56,613 INFO L554 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] [2021-06-05 18:23:56,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:56,817 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:56,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1894549891, now seen corresponding path program 255 times [2021-06-05 18:23:56,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:56,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685057768] [2021-06-05 18:23:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:57,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:57,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685057768] [2021-06-05 18:23:57,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685057768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:57,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695477722] [2021-06-05 18:23:57,080 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 [2021-06-05 18:23:57,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:23:57,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:57,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:57,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695477722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:57,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:57,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:23:57,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343463194] [2021-06-05 18:23:57,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:23:57,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:57,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:23:57,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:23:57,351 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) [2021-06-05 18:23:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:58,017 INFO L93 Difference]: Finished difference Result 5421 states and 13857 transitions. [2021-06-05 18:23:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:23:58,018 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 [2021-06-05 18:23:58,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:58,023 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 18:23:58,024 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 18:23:58,024 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 709.4ms TimeCoverageRelationStatistics Valid=977, Invalid=3055, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:23:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 18:23:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3728. [2021-06-05 18:23:58,063 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) [2021-06-05 18:23:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10343 transitions. [2021-06-05 18:23:58,067 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10343 transitions. Word has length 145 [2021-06-05 18:23:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:58,067 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10343 transitions. [2021-06-05 18:23:58,067 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) [2021-06-05 18:23:58,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10343 transitions. [2021-06-05 18:23:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:58,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:58,070 INFO L554 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] [2021-06-05 18:23:58,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:58,271 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -300775821, now seen corresponding path program 256 times [2021-06-05 18:23:58,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:58,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789761139] [2021-06-05 18:23:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:23:58,567 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:58,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:23:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789761139] [2021-06-05 18:23:58,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789761139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:58,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953628760] [2021-06-05 18:23:58,567 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 [2021-06-05 18:23:58,660 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:23:58,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:23:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:23:58,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:23:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:23:58,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953628760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:23:58,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:23:58,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:23:58,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603461986] [2021-06-05 18:23:58,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:23:58,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:23:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:23:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:23:58,888 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) [2021-06-05 18:23:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:23:59,632 INFO L93 Difference]: Finished difference Result 5446 states and 13982 transitions. [2021-06-05 18:23:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:23:59,633 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 [2021-06-05 18:23:59,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:23:59,643 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:23:59,643 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:23:59,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:23:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:23:59,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3803. [2021-06-05 18:23:59,686 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) [2021-06-05 18:23:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10568 transitions. [2021-06-05 18:23:59,691 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10568 transitions. Word has length 145 [2021-06-05 18:23:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:23:59,692 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10568 transitions. [2021-06-05 18:23:59,692 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) [2021-06-05 18:23:59,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10568 transitions. [2021-06-05 18:23:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:23:59,695 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:23:59,695 INFO L554 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] [2021-06-05 18:23:59,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:23:59,896 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:23:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:23:59,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1209424257, now seen corresponding path program 257 times [2021-06-05 18:23:59,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:23:59,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499590424] [2021-06-05 18:23:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:23:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:00,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:00,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499590424] [2021-06-05 18:24:00,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499590424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:00,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36429141] [2021-06-05 18:24:00,156 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 [2021-06-05 18:24:00,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:00,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:00,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:00,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:00,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36429141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:00,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:00,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:00,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886983070] [2021-06-05 18:24:00,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:00,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:00,411 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) [2021-06-05 18:24:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:01,110 INFO L93 Difference]: Finished difference Result 5471 states and 14107 transitions. [2021-06-05 18:24:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:24:01,111 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 [2021-06-05 18:24:01,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:01,116 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 18:24:01,116 INFO L226 Difference]: Without dead ends: 5201 [2021-06-05 18:24:01,116 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 737.3ms TimeCoverageRelationStatistics Valid=1040, Invalid=3250, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:01,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-05 18:24:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 3878. [2021-06-05 18:24:01,166 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) [2021-06-05 18:24:01,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10793 transitions. [2021-06-05 18:24:01,170 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10793 transitions. Word has length 145 [2021-06-05 18:24:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:01,171 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10793 transitions. [2021-06-05 18:24:01,171 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) [2021-06-05 18:24:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10793 transitions. [2021-06-05 18:24:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:01,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:01,173 INFO L554 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] [2021-06-05 18:24:01,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 18:24:01,374 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:01,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:01,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1849082481, now seen corresponding path program 258 times [2021-06-05 18:24:01,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:01,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132700126] [2021-06-05 18:24:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:01,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:01,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132700126] [2021-06-05 18:24:01,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132700126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:01,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534855951] [2021-06-05 18:24:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:24:01,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:01,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534855951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:01,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:01,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:01,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061341766] [2021-06-05 18:24:01,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:01,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:01,924 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) [2021-06-05 18:24:02,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:02,759 INFO L93 Difference]: Finished difference Result 5496 states and 14232 transitions. [2021-06-05 18:24:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:02,760 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 [2021-06-05 18:24:02,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:02,765 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:24:02,765 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:24:02,765 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 865.3ms TimeCoverageRelationStatistics Valid=1069, Invalid=3487, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:24:02,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3953. [2021-06-05 18:24:02,805 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) [2021-06-05 18:24:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 11018 transitions. [2021-06-05 18:24:02,811 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 11018 transitions. Word has length 145 [2021-06-05 18:24:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:02,811 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 11018 transitions. [2021-06-05 18:24:02,811 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) [2021-06-05 18:24:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 11018 transitions. [2021-06-05 18:24:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:02,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:02,814 INFO L554 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] [2021-06-05 18:24:03,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:03,014 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1074163455, now seen corresponding path program 259 times [2021-06-05 18:24:03,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:03,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697336002] [2021-06-05 18:24:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:03,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:03,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697336002] [2021-06-05 18:24:03,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697336002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:03,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282923605] [2021-06-05 18:24:03,307 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 [2021-06-05 18:24:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282923605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:03,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:03,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820506778] [2021-06-05 18:24:03,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:03,582 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) [2021-06-05 18:24:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:04,372 INFO L93 Difference]: Finished difference Result 5521 states and 14357 transitions. [2021-06-05 18:24:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:24:04,372 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 [2021-06-05 18:24:04,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:04,377 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 18:24:04,378 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 18:24:04,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 829.4ms TimeCoverageRelationStatistics Valid=1119, Invalid=3437, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:04,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 18:24:04,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4028. [2021-06-05 18:24:04,422 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) [2021-06-05 18:24:04,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11243 transitions. [2021-06-05 18:24:04,428 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11243 transitions. Word has length 145 [2021-06-05 18:24:04,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:04,428 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11243 transitions. [2021-06-05 18:24:04,428 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) [2021-06-05 18:24:04,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11243 transitions. [2021-06-05 18:24:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:04,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:04,432 INFO L554 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] [2021-06-05 18:24:04,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 18:24:04,632 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 620250095, now seen corresponding path program 260 times [2021-06-05 18:24:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:04,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741545570] [2021-06-05 18:24:04,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:04,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741545570] [2021-06-05 18:24:04,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741545570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:04,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613199167] [2021-06-05 18:24:04,884 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 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 [2021-06-05 18:24:04,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:04,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:04,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:04,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:05,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613199167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:05,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:05,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:05,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847436605] [2021-06-05 18:24:05,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:05,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:05,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:05,154 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) [2021-06-05 18:24:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:06,045 INFO L93 Difference]: Finished difference Result 5546 states and 14482 transitions. [2021-06-05 18:24:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:24:06,046 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 [2021-06-05 18:24:06,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:06,051 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 18:24:06,051 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:24:06,052 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 904.1ms TimeCoverageRelationStatistics Valid=1150, Invalid=3680, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:24:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4103. [2021-06-05 18:24:06,098 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) [2021-06-05 18:24:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11468 transitions. [2021-06-05 18:24:06,104 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11468 transitions. Word has length 145 [2021-06-05 18:24:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:06,104 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11468 transitions. [2021-06-05 18:24:06,104 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) [2021-06-05 18:24:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11468 transitions. [2021-06-05 18:24:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:06,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:06,108 INFO L554 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] [2021-06-05 18:24:06,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 18:24:06,308 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:06,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:06,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1498262013, now seen corresponding path program 261 times [2021-06-05 18:24:06,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:06,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256590582] [2021-06-05 18:24:06,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:06,572 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:06,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256590582] [2021-06-05 18:24:06,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256590582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:06,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954549236] [2021-06-05 18:24:06,572 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 [2021-06-05 18:24:06,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:24:06,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:06,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:06,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:06,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954549236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:06,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:06,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:06,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701336031] [2021-06-05 18:24:06,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:06,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:06,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:06,837 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) [2021-06-05 18:24:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:07,621 INFO L93 Difference]: Finished difference Result 5571 states and 14607 transitions. [2021-06-05 18:24:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:24:07,621 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 [2021-06-05 18:24:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:07,627 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 18:24:07,627 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 18:24:07,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 786.5ms TimeCoverageRelationStatistics Valid=1214, Invalid=3616, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:07,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 18:24:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4178. [2021-06-05 18:24:07,673 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) [2021-06-05 18:24:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11693 transitions. [2021-06-05 18:24:07,678 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11693 transitions. Word has length 145 [2021-06-05 18:24:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:07,678 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11693 transitions. [2021-06-05 18:24:07,678 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) [2021-06-05 18:24:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11693 transitions. [2021-06-05 18:24:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:07,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:07,682 INFO L554 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] [2021-06-05 18:24:07,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:07,883 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash 598207213, now seen corresponding path program 262 times [2021-06-05 18:24:07,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:07,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293964916] [2021-06-05 18:24:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:08,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293964916] [2021-06-05 18:24:08,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293964916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967023443] [2021-06-05 18:24:08,129 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 [2021-06-05 18:24:08,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:08,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967023443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:08,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:08,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:08,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588809612] [2021-06-05 18:24:08,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:08,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:08,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:08,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:08,394 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) [2021-06-05 18:24:09,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:09,359 INFO L93 Difference]: Finished difference Result 5596 states and 14732 transitions. [2021-06-05 18:24:09,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:24:09,360 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 [2021-06-05 18:24:09,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:09,365 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 18:24:09,365 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 18:24:09,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 962.3ms TimeCoverageRelationStatistics Valid=1247, Invalid=3865, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 18:24:09,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4253. [2021-06-05 18:24:09,410 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) [2021-06-05 18:24:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11918 transitions. [2021-06-05 18:24:09,416 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11918 transitions. Word has length 145 [2021-06-05 18:24:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:09,416 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11918 transitions. [2021-06-05 18:24:09,417 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) [2021-06-05 18:24:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11918 transitions. [2021-06-05 18:24:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:09,420 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:09,420 INFO L554 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] [2021-06-05 18:24:09,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-05 18:24:09,621 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash 169142907, now seen corresponding path program 263 times [2021-06-05 18:24:09,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:09,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491718924] [2021-06-05 18:24:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:09,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:09,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:09,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491718924] [2021-06-05 18:24:09,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491718924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:09,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957222492] [2021-06-05 18:24:09,860 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 [2021-06-05 18:24:09,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:09,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:09,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:10,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957222492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:10,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:10,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:10,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718279940] [2021-06-05 18:24:10,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:10,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:10,109 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) [2021-06-05 18:24:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:10,941 INFO L93 Difference]: Finished difference Result 5621 states and 14857 transitions. [2021-06-05 18:24:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:24:10,942 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 [2021-06-05 18:24:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:10,947 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 18:24:10,947 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:24:10,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=1325, Invalid=3787, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:10,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:24:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4328. [2021-06-05 18:24:10,993 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) [2021-06-05 18:24:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12143 transitions. [2021-06-05 18:24:10,999 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12143 transitions. Word has length 145 [2021-06-05 18:24:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:10,999 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12143 transitions. [2021-06-05 18:24:11,000 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) [2021-06-05 18:24:11,000 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12143 transitions. [2021-06-05 18:24:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:11,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:11,003 INFO L554 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] [2021-06-05 18:24:11,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:11,204 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash -517040277, now seen corresponding path program 264 times [2021-06-05 18:24:11,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:11,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225685086] [2021-06-05 18:24:11,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:11,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:11,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:11,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225685086] [2021-06-05 18:24:11,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225685086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:11,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123555978] [2021-06-05 18:24:11,469 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 [2021-06-05 18:24:11,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:11,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:11,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:11,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:11,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123555978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:11,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:11,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:11,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326717884] [2021-06-05 18:24:11,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:11,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:11,747 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) [2021-06-05 18:24:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:12,741 INFO L93 Difference]: Finished difference Result 5646 states and 14982 transitions. [2021-06-05 18:24:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:24:12,741 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 [2021-06-05 18:24:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:12,747 INFO L225 Difference]: With dead ends: 5646 [2021-06-05 18:24:12,747 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 18:24:12,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 1015.0ms TimeCoverageRelationStatistics Valid=1360, Invalid=4042, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:24:12,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 18:24:12,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 4403. [2021-06-05 18:24:12,799 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) [2021-06-05 18:24:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12368 transitions. [2021-06-05 18:24:12,805 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12368 transitions. Word has length 145 [2021-06-05 18:24:12,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:12,806 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12368 transitions. [2021-06-05 18:24:12,806 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) [2021-06-05 18:24:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12368 transitions. [2021-06-05 18:24:12,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:12,809 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:12,810 INFO L554 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] [2021-06-05 18:24:13,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:13,010 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:13,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -602075015, now seen corresponding path program 265 times [2021-06-05 18:24:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:13,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429415842] [2021-06-05 18:24:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:13,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429415842] [2021-06-05 18:24:13,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429415842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375943914] [2021-06-05 18:24:13,245 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 [2021-06-05 18:24:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:13,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:13,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:13,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375943914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:13,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:13,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:13,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492908088] [2021-06-05 18:24:13,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:13,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:13,493 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) [2021-06-05 18:24:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:14,361 INFO L93 Difference]: Finished difference Result 5671 states and 15107 transitions. [2021-06-05 18:24:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:24:14,362 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 [2021-06-05 18:24:14,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:14,367 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:24:14,367 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:24:14,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 856.8ms TimeCoverageRelationStatistics Valid=1452, Invalid=3950, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:24:14,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:24:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4478. [2021-06-05 18:24:14,414 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) [2021-06-05 18:24:14,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12593 transitions. [2021-06-05 18:24:14,421 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12593 transitions. Word has length 145 [2021-06-05 18:24:14,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:14,421 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12593 transitions. [2021-06-05 18:24:14,421 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) [2021-06-05 18:24:14,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12593 transitions. [2021-06-05 18:24:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:14,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:14,424 INFO L554 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] [2021-06-05 18:24:14,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:14,625 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:14,625 INFO L82 PathProgramCache]: Analyzing trace with hash -670226071, now seen corresponding path program 266 times [2021-06-05 18:24:14,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:14,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412709646] [2021-06-05 18:24:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:14,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:14,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412709646] [2021-06-05 18:24:14,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412709646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:14,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915524084] [2021-06-05 18:24:14,862 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 [2021-06-05 18:24:14,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:14,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:14,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:14,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:15,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915524084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:15,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:15,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:15,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027382643] [2021-06-05 18:24:15,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:15,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:15,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:15,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:15,124 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) [2021-06-05 18:24:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:16,180 INFO L93 Difference]: Finished difference Result 5696 states and 15232 transitions. [2021-06-05 18:24:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:24:16,180 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 [2021-06-05 18:24:16,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:16,186 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:24:16,186 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:24:16,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1511 ImplicationChecksByTransitivity, 1029.4ms TimeCoverageRelationStatistics Valid=1489, Invalid=4211, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:24:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:24:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4553. [2021-06-05 18:24:16,251 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) [2021-06-05 18:24:16,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12818 transitions. [2021-06-05 18:24:16,258 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12818 transitions. Word has length 145 [2021-06-05 18:24:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:16,258 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12818 transitions. [2021-06-05 18:24:16,258 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) [2021-06-05 18:24:16,258 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12818 transitions. [2021-06-05 18:24:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:16,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:16,262 INFO L554 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] [2021-06-05 18:24:16,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:16,462 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:16,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:16,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1967195145, now seen corresponding path program 267 times [2021-06-05 18:24:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:16,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304890229] [2021-06-05 18:24:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:16,695 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:16,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304890229] [2021-06-05 18:24:16,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304890229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:16,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561707795] [2021-06-05 18:24:16,696 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 [2021-06-05 18:24:16,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-05 18:24:16,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:16,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:16,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561707795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:16,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:16,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:16,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881025556] [2021-06-05 18:24:16,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:16,950 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) [2021-06-05 18:24:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:17,853 INFO L93 Difference]: Finished difference Result 5766 states and 15477 transitions. [2021-06-05 18:24:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:24:17,854 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 [2021-06-05 18:24:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:17,860 INFO L225 Difference]: With dead ends: 5766 [2021-06-05 18:24:17,860 INFO L226 Difference]: Without dead ends: 5496 [2021-06-05 18:24:17,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=1595, Invalid=4105, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:24:17,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-06-05 18:24:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4628. [2021-06-05 18:24:17,911 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) [2021-06-05 18:24:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13058 transitions. [2021-06-05 18:24:17,918 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13058 transitions. Word has length 145 [2021-06-05 18:24:17,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:17,918 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13058 transitions. [2021-06-05 18:24:17,918 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) [2021-06-05 18:24:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13058 transitions. [2021-06-05 18:24:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:17,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:17,924 INFO L554 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] [2021-06-05 18:24:18,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:18,128 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1537441561, now seen corresponding path program 268 times [2021-06-05 18:24:18,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:18,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447665791] [2021-06-05 18:24:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:18,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:18,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447665791] [2021-06-05 18:24:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447665791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848621121] [2021-06-05 18:24:18,369 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 [2021-06-05 18:24:18,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:18,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:18,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:18,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:18,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848621121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:18,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:18,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135319006] [2021-06-05 18:24:18,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:18,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:18,631 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) [2021-06-05 18:24:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:19,806 INFO L93 Difference]: Finished difference Result 6344 states and 17103 transitions. [2021-06-05 18:24:19,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:24:19,807 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 [2021-06-05 18:24:19,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:19,813 INFO L225 Difference]: With dead ends: 6344 [2021-06-05 18:24:19,813 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 18:24:19,813 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 1126.5ms TimeCoverageRelationStatistics Valid=1657, Invalid=4663, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:24:19,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 18:24:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4703. [2021-06-05 18:24:19,858 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) [2021-06-05 18:24:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13288 transitions. [2021-06-05 18:24:19,865 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13288 transitions. Word has length 145 [2021-06-05 18:24:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:19,865 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13288 transitions. [2021-06-05 18:24:19,865 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) [2021-06-05 18:24:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13288 transitions. [2021-06-05 18:24:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:19,869 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:19,869 INFO L554 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] [2021-06-05 18:24:20,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:20,070 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1595175691, now seen corresponding path program 269 times [2021-06-05 18:24:20,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:20,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557033725] [2021-06-05 18:24:20,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:20,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:20,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557033725] [2021-06-05 18:24:20,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557033725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:20,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513561161] [2021-06-05 18:24:20,320 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 [2021-06-05 18:24:20,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-05 18:24:20,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:20,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:20,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513561161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:20,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:20,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-06-05 18:24:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621019328] [2021-06-05 18:24:20,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:20,568 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) [2021-06-05 18:24:21,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:21,515 INFO L93 Difference]: Finished difference Result 6548 states and 17771 transitions. [2021-06-05 18:24:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:24:21,515 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 [2021-06-05 18:24:21,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:21,521 INFO L225 Difference]: With dead ends: 6548 [2021-06-05 18:24:21,521 INFO L226 Difference]: Without dead ends: 6278 [2021-06-05 18:24:21,521 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=1755, Invalid=4251, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:24:21,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2021-06-05 18:24:21,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 4883. [2021-06-05 18:24:21,568 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) [2021-06-05 18:24:21,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4883 states to 4883 states and 13847 transitions. [2021-06-05 18:24:21,575 INFO L78 Accepts]: Start accepts. Automaton has 4883 states and 13847 transitions. Word has length 145 [2021-06-05 18:24:21,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:21,575 INFO L482 AbstractCegarLoop]: Abstraction has 4883 states and 13847 transitions. [2021-06-05 18:24:21,575 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) [2021-06-05 18:24:21,575 INFO L276 IsEmpty]: Start isEmpty. Operand 4883 states and 13847 transitions. [2021-06-05 18:24:21,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-06-05 18:24:21,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:21,579 INFO L554 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] [2021-06-05 18:24:21,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 18:24:21,779 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:21,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:21,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1572832441, now seen corresponding path program 270 times [2021-06-05 18:24:21,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:21,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847904158] [2021-06-05 18:24:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:22,016 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:22,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:22,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847904158] [2021-06-05 18:24:22,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847904158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:22,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040780925] [2021-06-05 18:24:22,016 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 [2021-06-05 18:24:22,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-05 18:24:22,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:22,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:24:22,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040780925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:22,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:22,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-06-05 18:24:22,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562621127] [2021-06-05 18:24:22,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:22,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:22,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:22,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:22,285 INFO L87 Difference]: Start difference. First operand 4883 states and 13847 transitions. Second operand has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:23,471 INFO L93 Difference]: Finished difference Result 6416 states and 17436 transitions. [2021-06-05 18:24:23,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:24:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-06-05 18:24:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:23,478 INFO L225 Difference]: With dead ends: 6416 [2021-06-05 18:24:23,478 INFO L226 Difference]: Without dead ends: 5841 [2021-06-05 18:24:23,479 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 1164.0ms TimeCoverageRelationStatistics Valid=1844, Invalid=4962, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:24:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5841 states. [2021-06-05 18:24:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5841 to 3124. [2021-06-05 18:24:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 2.739673390970221) internal successors, (8556), 3123 states have internal predecessors, (8556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 8556 transitions. [2021-06-05 18:24:23,521 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 8556 transitions. Word has length 145 [2021-06-05 18:24:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:23,521 INFO L482 AbstractCegarLoop]: Abstraction has 3124 states and 8556 transitions. [2021-06-05 18:24:23,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 4.933333333333334) internal successors, (148), 30 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 8556 transitions. [2021-06-05 18:24:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:23,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:23,523 INFO L554 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] [2021-06-05 18:24:23,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 18:24:23,724 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1174739515, now seen corresponding path program 271 times [2021-06-05 18:24:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:23,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974085213] [2021-06-05 18:24:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:24,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974085213] [2021-06-05 18:24:24,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974085213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:24,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964048023] [2021-06-05 18:24:24,056 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 [2021-06-05 18:24:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:24,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:24:24,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:24,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964048023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:24,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:24,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 32 [2021-06-05 18:24:24,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201549384] [2021-06-05 18:24:24,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:24:24,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:24,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:24:24,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:24:24,342 INFO L87 Difference]: Start difference. First operand 3124 states and 8556 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:24,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:24,976 INFO L93 Difference]: Finished difference Result 4364 states and 11356 transitions. [2021-06-05 18:24:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:24:24,976 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:24,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:24,980 INFO L225 Difference]: With dead ends: 4364 [2021-06-05 18:24:24,980 INFO L226 Difference]: Without dead ends: 4030 [2021-06-05 18:24:24,981 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 772.8ms TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4030 states. [2021-06-05 18:24:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4030 to 3209. [2021-06-05 18:24:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 3208 states have (on average 2.720074812967581) internal successors, (8726), 3208 states have internal predecessors, (8726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 8726 transitions. [2021-06-05 18:24:25,015 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 8726 transitions. Word has length 150 [2021-06-05 18:24:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:25,015 INFO L482 AbstractCegarLoop]: Abstraction has 3209 states and 8726 transitions. [2021-06-05 18:24:25,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 8726 transitions. [2021-06-05 18:24:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:25,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:25,017 INFO L554 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] [2021-06-05 18:24:25,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 18:24:25,218 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:25,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:25,218 INFO L82 PathProgramCache]: Analyzing trace with hash 174102121, now seen corresponding path program 272 times [2021-06-05 18:24:25,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:25,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048580542] [2021-06-05 18:24:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:25,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048580542] [2021-06-05 18:24:25,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048580542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:25,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145802072] [2021-06-05 18:24:25,521 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 [2021-06-05 18:24:25,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:25,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:25,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145802072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:25,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:25,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:25,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307844747] [2021-06-05 18:24:25,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:25,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:25,774 INFO L87 Difference]: Start difference. First operand 3209 states and 8726 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:26,294 INFO L93 Difference]: Finished difference Result 5486 states and 13537 transitions. [2021-06-05 18:24:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:24:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:26,298 INFO L225 Difference]: With dead ends: 5486 [2021-06-05 18:24:26,299 INFO L226 Difference]: Without dead ends: 5216 [2021-06-05 18:24:26,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 652.4ms TimeCoverageRelationStatistics Valid=854, Invalid=2226, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:24:26,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5216 states. [2021-06-05 18:24:26,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5216 to 3353. [2021-06-05 18:24:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7276252983293556) internal successors, (9143), 3352 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9143 transitions. [2021-06-05 18:24:26,335 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9143 transitions. Word has length 150 [2021-06-05 18:24:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:26,336 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9143 transitions. [2021-06-05 18:24:26,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9143 transitions. [2021-06-05 18:24:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:26,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:26,338 INFO L554 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] [2021-06-05 18:24:26,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2021-06-05 18:24:26,539 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1057153881, now seen corresponding path program 273 times [2021-06-05 18:24:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:26,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840772607] [2021-06-05 18:24:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:26,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840772607] [2021-06-05 18:24:26,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840772607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:26,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298854980] [2021-06-05 18:24:26,855 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 [2021-06-05 18:24:26,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:24:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:26,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:27,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298854980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:27,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:27,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:27,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209712658] [2021-06-05 18:24:27,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:27,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:27,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:27,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:27,134 INFO L87 Difference]: Start difference. First operand 3353 states and 9143 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:27,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:27,732 INFO L93 Difference]: Finished difference Result 5446 states and 13532 transitions. [2021-06-05 18:24:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:24:27,733 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 [2021-06-05 18:24:27,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:27,738 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:24:27,738 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:24:27,738 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 728.8ms TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:24:27,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:24:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3428. [2021-06-05 18:24:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7335862270207176) internal successors, (9368), 3427 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9368 transitions. [2021-06-05 18:24:27,780 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9368 transitions. Word has length 150 [2021-06-05 18:24:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:27,780 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9368 transitions. [2021-06-05 18:24:27,780 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) [2021-06-05 18:24:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9368 transitions. [2021-06-05 18:24:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:27,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:27,783 INFO L554 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] [2021-06-05 18:24:27,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:27,984 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash -835055513, now seen corresponding path program 274 times [2021-06-05 18:24:27,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:27,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036549523] [2021-06-05 18:24:27,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:28,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:28,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036549523] [2021-06-05 18:24:28,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036549523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:28,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395689132] [2021-06-05 18:24:28,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:24:28,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:28,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:28,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:28,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:28,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395689132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:28,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:28,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:28,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029539934] [2021-06-05 18:24:28,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:28,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:28,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:28,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:28,531 INFO L87 Difference]: Start difference. First operand 3428 states and 9368 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:29,103 INFO L93 Difference]: Finished difference Result 5496 states and 13707 transitions. [2021-06-05 18:24:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:24:29,103 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:29,108 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:24:29,108 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:24:29,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 672.9ms TimeCoverageRelationStatistics Valid=855, Invalid=2451, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:24:29,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:24:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 3503. [2021-06-05 18:24:29,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7392918332381497) internal successors, (9593), 3502 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9593 transitions. [2021-06-05 18:24:29,148 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9593 transitions. Word has length 150 [2021-06-05 18:24:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:29,148 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9593 transitions. [2021-06-05 18:24:29,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9593 transitions. [2021-06-05 18:24:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:29,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:29,151 INFO L554 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] [2021-06-05 18:24:29,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 18:24:29,352 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1006291287, now seen corresponding path program 275 times [2021-06-05 18:24:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:29,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901168697] [2021-06-05 18:24:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:29,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:29,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901168697] [2021-06-05 18:24:29,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901168697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:29,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852738798] [2021-06-05 18:24:29,658 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 [2021-06-05 18:24:29,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:24:29,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:29,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852738798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:29,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024799782] [2021-06-05 18:24:29,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:29,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:29,930 INFO L87 Difference]: Start difference. First operand 3503 states and 9593 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:30,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:30,663 INFO L93 Difference]: Finished difference Result 5521 states and 13832 transitions. [2021-06-05 18:24:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:24:30,663 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 [2021-06-05 18:24:30,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:30,668 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 18:24:30,669 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 18:24:30,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=938, Invalid=2844, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 18:24:30,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 3578. [2021-06-05 18:24:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.7447581772435004) internal successors, (9818), 3577 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9818 transitions. [2021-06-05 18:24:30,710 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9818 transitions. Word has length 150 [2021-06-05 18:24:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:30,710 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9818 transitions. [2021-06-05 18:24:30,710 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) [2021-06-05 18:24:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9818 transitions. [2021-06-05 18:24:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:30,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:30,713 INFO L554 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] [2021-06-05 18:24:30,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:30,913 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:30,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1887850469, now seen corresponding path program 276 times [2021-06-05 18:24:30,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:30,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469166438] [2021-06-05 18:24:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:31,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:31,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469166438] [2021-06-05 18:24:31,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469166438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:31,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433719163] [2021-06-05 18:24:31,199 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 [2021-06-05 18:24:31,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:24:31,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:31,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:31,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433719163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:31,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:31,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:31,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478951254] [2021-06-05 18:24:31,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:31,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:31,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:31,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:31,480 INFO L87 Difference]: Start difference. First operand 3578 states and 9818 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:32,092 INFO L93 Difference]: Finished difference Result 5546 states and 13957 transitions. [2021-06-05 18:24:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:24:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:32,097 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 18:24:32,097 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:24:32,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=872, Invalid=2668, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:24:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:24:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 3653. [2021-06-05 18:24:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.75) internal successors, (10043), 3652 states have internal predecessors, (10043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10043 transitions. [2021-06-05 18:24:32,139 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10043 transitions. Word has length 150 [2021-06-05 18:24:32,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:32,139 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10043 transitions. [2021-06-05 18:24:32,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10043 transitions. [2021-06-05 18:24:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:32,142 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:32,142 INFO L554 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] [2021-06-05 18:24:32,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:32,342 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:32,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1245476053, now seen corresponding path program 277 times [2021-06-05 18:24:32,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929225181] [2021-06-05 18:24:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:32,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:32,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929225181] [2021-06-05 18:24:32,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929225181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:32,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30523373] [2021-06-05 18:24:32,657 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 [2021-06-05 18:24:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:32,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:32,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30523373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:32,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:32,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:32,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885940067] [2021-06-05 18:24:32,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:32,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:32,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:32,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:32,920 INFO L87 Difference]: Start difference. First operand 3653 states and 10043 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:33,662 INFO L93 Difference]: Finished difference Result 5571 states and 14082 transitions. [2021-06-05 18:24:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:24:33,662 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 [2021-06-05 18:24:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:33,667 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 18:24:33,668 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 18:24:33,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 822.7ms TimeCoverageRelationStatistics Valid=963, Invalid=3069, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:33,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 18:24:33,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 3728. [2021-06-05 18:24:33,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.7550308559162864) internal successors, (10268), 3727 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10268 transitions. [2021-06-05 18:24:33,724 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10268 transitions. Word has length 150 [2021-06-05 18:24:33,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:33,724 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10268 transitions. [2021-06-05 18:24:33,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10268 transitions. [2021-06-05 18:24:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:33,727 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:33,727 INFO L554 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] [2021-06-05 18:24:33,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:33,928 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:33,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1198929123, now seen corresponding path program 278 times [2021-06-05 18:24:33,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:33,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946095593] [2021-06-05 18:24:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:34,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946095593] [2021-06-05 18:24:34,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946095593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:34,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910583815] [2021-06-05 18:24:34,205 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 [2021-06-05 18:24:34,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:34,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:34,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:34,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910583815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:34,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:34,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:34,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879095387] [2021-06-05 18:24:34,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:34,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:34,453 INFO L87 Difference]: Start difference. First operand 3728 states and 10268 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:35,104 INFO L93 Difference]: Finished difference Result 5596 states and 14207 transitions. [2021-06-05 18:24:35,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:24:35,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:35,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:35,110 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 18:24:35,110 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 18:24:35,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 713.2ms TimeCoverageRelationStatistics Valid=905, Invalid=2877, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:24:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 18:24:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 3803. [2021-06-05 18:24:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.759863229879011) internal successors, (10493), 3802 states have internal predecessors, (10493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10493 transitions. [2021-06-05 18:24:35,158 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10493 transitions. Word has length 150 [2021-06-05 18:24:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:35,158 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10493 transitions. [2021-06-05 18:24:35,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10493 transitions. [2021-06-05 18:24:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:35,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:35,162 INFO L554 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] [2021-06-05 18:24:35,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:35,362 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:35,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:35,362 INFO L82 PathProgramCache]: Analyzing trace with hash 280544723, now seen corresponding path program 279 times [2021-06-05 18:24:35,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:35,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797488448] [2021-06-05 18:24:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:35,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:35,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797488448] [2021-06-05 18:24:35,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797488448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:35,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201962323] [2021-06-05 18:24:35,658 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 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 [2021-06-05 18:24:35,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:24:35,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:35,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:35,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:35,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201962323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:35,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:35,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:35,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401389687] [2021-06-05 18:24:35,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:35,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:35,934 INFO L87 Difference]: Start difference. First operand 3803 states and 10493 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:36,722 INFO L93 Difference]: Finished difference Result 5621 states and 14332 transitions. [2021-06-05 18:24:36,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:24:36,722 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 [2021-06-05 18:24:36,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:36,728 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 18:24:36,729 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:24:36,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=1004, Invalid=3286, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:24:36,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 3878. [2021-06-05 18:24:36,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7645086407015733) internal successors, (10718), 3877 states have internal predecessors, (10718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:36,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10718 transitions. [2021-06-05 18:24:36,781 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10718 transitions. Word has length 150 [2021-06-05 18:24:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:36,781 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10718 transitions. [2021-06-05 18:24:36,781 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) [2021-06-05 18:24:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10718 transitions. [2021-06-05 18:24:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:36,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:36,785 INFO L554 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] [2021-06-05 18:24:36,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-05 18:24:36,985 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:36,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:36,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1496146079, now seen corresponding path program 280 times [2021-06-05 18:24:36,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:36,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772662517] [2021-06-05 18:24:36,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:37,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772662517] [2021-06-05 18:24:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772662517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:37,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694501568] [2021-06-05 18:24:37,255 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 [2021-06-05 18:24:37,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:37,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:37,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:37,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:37,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694501568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:37,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:37,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:37,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159975180] [2021-06-05 18:24:37,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:37,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:37,515 INFO L87 Difference]: Start difference. First operand 3878 states and 10718 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:38,271 INFO L93 Difference]: Finished difference Result 5646 states and 14457 transitions. [2021-06-05 18:24:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:24:38,271 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:38,277 INFO L225 Difference]: With dead ends: 5646 [2021-06-05 18:24:38,277 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 18:24:38,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=954, Invalid=3078, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:24:38,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 18:24:38,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 3953. [2021-06-05 18:24:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7689777327935223) internal successors, (10943), 3952 states have internal predecessors, (10943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10943 transitions. [2021-06-05 18:24:38,323 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10943 transitions. Word has length 150 [2021-06-05 18:24:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:38,323 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10943 transitions. [2021-06-05 18:24:38,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10943 transitions. [2021-06-05 18:24:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:38,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:38,327 INFO L554 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] [2021-06-05 18:24:38,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 18:24:38,527 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:38,528 INFO L82 PathProgramCache]: Analyzing trace with hash 603495505, now seen corresponding path program 281 times [2021-06-05 18:24:38,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:38,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248302843] [2021-06-05 18:24:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:38,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:38,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248302843] [2021-06-05 18:24:38,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248302843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:38,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808049559] [2021-06-05 18:24:38,829 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 [2021-06-05 18:24:38,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:24:38,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:38,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:39,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808049559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:39,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:39,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:39,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407761843] [2021-06-05 18:24:39,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:39,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:39,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:39,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:39,095 INFO L87 Difference]: Start difference. First operand 3953 states and 10943 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:39,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:39,969 INFO L93 Difference]: Finished difference Result 5671 states and 14582 transitions. [2021-06-05 18:24:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:24:39,969 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 [2021-06-05 18:24:39,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:39,974 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:24:39,975 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:24:39,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 913.6ms TimeCoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:24:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4028. [2021-06-05 18:24:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 2.7732803575862923) internal successors, (11168), 4027 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:40,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 11168 transitions. [2021-06-05 18:24:40,023 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 11168 transitions. Word has length 150 [2021-06-05 18:24:40,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:40,023 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 11168 transitions. [2021-06-05 18:24:40,023 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) [2021-06-05 18:24:40,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 11168 transitions. [2021-06-05 18:24:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:40,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:40,026 INFO L554 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] [2021-06-05 18:24:40,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-05 18:24:40,227 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:40,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:40,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2113695583, now seen corresponding path program 282 times [2021-06-05 18:24:40,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:40,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807073290] [2021-06-05 18:24:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:40,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:40,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807073290] [2021-06-05 18:24:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807073290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:40,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938876640] [2021-06-05 18:24:40,505 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 [2021-06-05 18:24:40,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:24:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:40,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938876640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:40,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:40,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:40,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945138108] [2021-06-05 18:24:40,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:40,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:40,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:40,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:40,755 INFO L87 Difference]: Start difference. First operand 4028 states and 11168 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:41,558 INFO L93 Difference]: Finished difference Result 5696 states and 14707 transitions. [2021-06-05 18:24:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:24:41,558 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:41,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:41,563 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:24:41,563 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:24:41,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=1019, Invalid=3271, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:24:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:24:41,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4103. [2021-06-05 18:24:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4103 states, 4102 states have (on average 2.7774256460263285) internal successors, (11393), 4102 states have internal predecessors, (11393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4103 states to 4103 states and 11393 transitions. [2021-06-05 18:24:41,611 INFO L78 Accepts]: Start accepts. Automaton has 4103 states and 11393 transitions. Word has length 150 [2021-06-05 18:24:41,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:41,611 INFO L482 AbstractCegarLoop]: Abstraction has 4103 states and 11393 transitions. [2021-06-05 18:24:41,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 4103 states and 11393 transitions. [2021-06-05 18:24:41,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:41,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:41,614 INFO L554 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] [2021-06-05 18:24:41,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:41,815 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1541613489, now seen corresponding path program 283 times [2021-06-05 18:24:41,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:41,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292388978] [2021-06-05 18:24:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:42,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292388978] [2021-06-05 18:24:42,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292388978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:42,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837065939] [2021-06-05 18:24:42,078 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 [2021-06-05 18:24:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:42,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837065939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:42,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:42,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:42,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492785346] [2021-06-05 18:24:42,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:42,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:42,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:42,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:42,337 INFO L87 Difference]: Start difference. First operand 4103 states and 11393 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:43,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:43,301 INFO L93 Difference]: Finished difference Result 5721 states and 14832 transitions. [2021-06-05 18:24:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:24:43,301 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 [2021-06-05 18:24:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:43,307 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 18:24:43,307 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 18:24:43,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 922.5ms TimeCoverageRelationStatistics Valid=1134, Invalid=3696, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:43,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 18:24:43,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4178. [2021-06-05 18:24:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4178 states, 4177 states have (on average 2.7814220732583195) internal successors, (11618), 4177 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4178 states to 4178 states and 11618 transitions. [2021-06-05 18:24:43,357 INFO L78 Accepts]: Start accepts. Automaton has 4178 states and 11618 transitions. Word has length 150 [2021-06-05 18:24:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:43,358 INFO L482 AbstractCegarLoop]: Abstraction has 4178 states and 11618 transitions. [2021-06-05 18:24:43,358 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) [2021-06-05 18:24:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4178 states and 11618 transitions. [2021-06-05 18:24:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:43,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:43,361 INFO L554 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] [2021-06-05 18:24:43,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:43,562 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1978434781, now seen corresponding path program 284 times [2021-06-05 18:24:43,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:43,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327010480] [2021-06-05 18:24:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:43,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327010480] [2021-06-05 18:24:43,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327010480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:43,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395558134] [2021-06-05 18:24:43,875 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 [2021-06-05 18:24:43,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:43,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:43,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:43,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:44,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395558134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:44,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:44,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:44,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352058968] [2021-06-05 18:24:44,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:44,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:44,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:44,119 INFO L87 Difference]: Start difference. First operand 4178 states and 11618 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:44,907 INFO L93 Difference]: Finished difference Result 5746 states and 14957 transitions. [2021-06-05 18:24:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:24:44,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:44,913 INFO L225 Difference]: With dead ends: 5746 [2021-06-05 18:24:44,914 INFO L226 Difference]: Without dead ends: 5476 [2021-06-05 18:24:44,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 812.7ms TimeCoverageRelationStatistics Valid=1100, Invalid=3456, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:24:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-05 18:24:44,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 4253. [2021-06-05 18:24:44,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4253 states, 4252 states have (on average 2.785277516462841) internal successors, (11843), 4252 states have internal predecessors, (11843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4253 states to 4253 states and 11843 transitions. [2021-06-05 18:24:44,968 INFO L78 Accepts]: Start accepts. Automaton has 4253 states and 11843 transitions. Word has length 150 [2021-06-05 18:24:44,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:44,968 INFO L482 AbstractCegarLoop]: Abstraction has 4253 states and 11843 transitions. [2021-06-05 18:24:44,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:44,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4253 states and 11843 transitions. [2021-06-05 18:24:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:44,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:44,972 INFO L554 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] [2021-06-05 18:24:45,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:45,172 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1524521421, now seen corresponding path program 285 times [2021-06-05 18:24:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:45,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979707606] [2021-06-05 18:24:45,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:45,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:45,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979707606] [2021-06-05 18:24:45,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979707606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:45,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388097650] [2021-06-05 18:24:45,453 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 [2021-06-05 18:24:45,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:24:45,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:45,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:45,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388097650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:45,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:45,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:45,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957192492] [2021-06-05 18:24:45,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:45,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:45,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:45,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:45,729 INFO L87 Difference]: Start difference. First operand 4253 states and 11843 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:46,731 INFO L93 Difference]: Finished difference Result 5771 states and 15082 transitions. [2021-06-05 18:24:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:24:46,731 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 [2021-06-05 18:24:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:46,737 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 18:24:46,737 INFO L226 Difference]: Without dead ends: 5501 [2021-06-05 18:24:46,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 1003.3ms TimeCoverageRelationStatistics Valid=1223, Invalid=3889, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-05 18:24:46,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4328. [2021-06-05 18:24:46,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4328 states, 4327 states have (on average 2.7889993066789924) internal successors, (12068), 4327 states have internal predecessors, (12068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4328 states to 4328 states and 12068 transitions. [2021-06-05 18:24:46,790 INFO L78 Accepts]: Start accepts. Automaton has 4328 states and 12068 transitions. Word has length 150 [2021-06-05 18:24:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:46,790 INFO L482 AbstractCegarLoop]: Abstraction has 4328 states and 12068 transitions. [2021-06-05 18:24:46,791 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) [2021-06-05 18:24:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4328 states and 12068 transitions. [2021-06-05 18:24:46,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:46,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:46,794 INFO L554 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] [2021-06-05 18:24:46,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:46,995 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:46,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:46,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1892433957, now seen corresponding path program 286 times [2021-06-05 18:24:46,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:46,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210143755] [2021-06-05 18:24:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:47,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210143755] [2021-06-05 18:24:47,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210143755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:47,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937686351] [2021-06-05 18:24:47,250 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 [2021-06-05 18:24:47,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:47,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:47,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:47,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:47,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937686351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:47,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:47,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:47,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466457698] [2021-06-05 18:24:47,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:47,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:47,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:47,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:47,493 INFO L87 Difference]: Start difference. First operand 4328 states and 12068 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:48,314 INFO L93 Difference]: Finished difference Result 5796 states and 15207 transitions. [2021-06-05 18:24:48,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:24:48,314 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:48,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:48,320 INFO L225 Difference]: With dead ends: 5796 [2021-06-05 18:24:48,320 INFO L226 Difference]: Without dead ends: 5526 [2021-06-05 18:24:48,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=1197, Invalid=3633, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:24:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-05 18:24:48,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4403. [2021-06-05 18:24:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 4402 states have (on average 2.7925942753293955) internal successors, (12293), 4402 states have internal predecessors, (12293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 12293 transitions. [2021-06-05 18:24:48,374 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 12293 transitions. Word has length 150 [2021-06-05 18:24:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:48,374 INFO L482 AbstractCegarLoop]: Abstraction has 4403 states and 12293 transitions. [2021-06-05 18:24:48,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 12293 transitions. [2021-06-05 18:24:48,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:48,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:48,378 INFO L554 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] [2021-06-05 18:24:48,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,290 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:48,578 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:48,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:48,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1502478539, now seen corresponding path program 287 times [2021-06-05 18:24:48,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:48,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867242521] [2021-06-05 18:24:48,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:48,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867242521] [2021-06-05 18:24:48,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867242521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:48,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996532077] [2021-06-05 18:24:48,862 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 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 [2021-06-05 18:24:48,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:24:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:49,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996532077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:49,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:49,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735572417] [2021-06-05 18:24:49,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:49,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:49,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:49,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:49,123 INFO L87 Difference]: Start difference. First operand 4403 states and 12293 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:50,156 INFO L93 Difference]: Finished difference Result 5821 states and 15332 transitions. [2021-06-05 18:24:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:24:50,157 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 [2021-06-05 18:24:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:50,163 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 18:24:50,163 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 18:24:50,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1054.7ms TimeCoverageRelationStatistics Valid=1328, Invalid=4074, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:24:50,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 18:24:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4478. [2021-06-05 18:24:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4478 states, 4477 states have (on average 2.796068796068796) internal successors, (12518), 4477 states have internal predecessors, (12518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4478 states to 4478 states and 12518 transitions. [2021-06-05 18:24:50,218 INFO L78 Accepts]: Start accepts. Automaton has 4478 states and 12518 transitions. Word has length 150 [2021-06-05 18:24:50,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:50,218 INFO L482 AbstractCegarLoop]: Abstraction has 4478 states and 12518 transitions. [2021-06-05 18:24:50,218 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) [2021-06-05 18:24:50,218 INFO L276 IsEmpty]: Start isEmpty. Operand 4478 states and 12518 transitions. [2021-06-05 18:24:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:50,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:50,222 INFO L554 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] [2021-06-05 18:24:50,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:50,422 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1073414233, now seen corresponding path program 288 times [2021-06-05 18:24:50,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:50,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046292276] [2021-06-05 18:24:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:50,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:50,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046292276] [2021-06-05 18:24:50,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046292276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:50,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356805301] [2021-06-05 18:24:50,678 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 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 [2021-06-05 18:24:50,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:24:50,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:50,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:50,930 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:50,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356805301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:50,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:50,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340433037] [2021-06-05 18:24:50,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:50,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:50,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:50,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:50,931 INFO L87 Difference]: Start difference. First operand 4478 states and 12518 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:51,823 INFO L93 Difference]: Finished difference Result 5846 states and 15457 transitions. [2021-06-05 18:24:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:24:51,824 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:51,830 INFO L225 Difference]: With dead ends: 5846 [2021-06-05 18:24:51,830 INFO L226 Difference]: Without dead ends: 5576 [2021-06-05 18:24:51,831 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 890.6ms TimeCoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:24:51,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-05 18:24:51,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4553. [2021-06-05 18:24:51,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4552 states have (on average 2.7994288224956065) internal successors, (12743), 4552 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 12743 transitions. [2021-06-05 18:24:51,892 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 12743 transitions. Word has length 150 [2021-06-05 18:24:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:51,892 INFO L482 AbstractCegarLoop]: Abstraction has 4553 states and 12743 transitions. [2021-06-05 18:24:51,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 12743 transitions. [2021-06-05 18:24:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:51,896 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:51,896 INFO L554 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] [2021-06-05 18:24:52,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:52,096 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:52,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash 387231049, now seen corresponding path program 289 times [2021-06-05 18:24:52,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:52,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790867561] [2021-06-05 18:24:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:52,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790867561] [2021-06-05 18:24:52,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790867561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:52,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726396997] [2021-06-05 18:24:52,351 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 [2021-06-05 18:24:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:52,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:52,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726396997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:52,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:52,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298471898] [2021-06-05 18:24:52,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:52,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:52,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:52,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:52,608 INFO L87 Difference]: Start difference. First operand 4553 states and 12743 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:53,723 INFO L93 Difference]: Finished difference Result 5871 states and 15582 transitions. [2021-06-05 18:24:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:24:53,724 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 [2021-06-05 18:24:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:53,728 INFO L225 Difference]: With dead ends: 5871 [2021-06-05 18:24:53,728 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 18:24:53,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 1083.4ms TimeCoverageRelationStatistics Valid=1449, Invalid=4251, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:24:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 18:24:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4628. [2021-06-05 18:24:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.802679922195807) internal successors, (12968), 4627 states have internal predecessors, (12968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 12968 transitions. [2021-06-05 18:24:53,780 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 12968 transitions. Word has length 150 [2021-06-05 18:24:53,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:53,780 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 12968 transitions. [2021-06-05 18:24:53,780 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) [2021-06-05 18:24:53,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 12968 transitions. [2021-06-05 18:24:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:53,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:53,784 INFO L554 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] [2021-06-05 18:24:53,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:53,984 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 302196311, now seen corresponding path program 290 times [2021-06-05 18:24:53,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:53,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677699625] [2021-06-05 18:24:53,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:54,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:54,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677699625] [2021-06-05 18:24:54,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677699625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:54,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778828033] [2021-06-05 18:24:54,236 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 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 [2021-06-05 18:24:54,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:24:54,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:54,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:54,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:54,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778828033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:54,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:54,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:54,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031250859] [2021-06-05 18:24:54,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:54,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:54,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:54,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:54,477 INFO L87 Difference]: Start difference. First operand 4628 states and 12968 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:55,384 INFO L93 Difference]: Finished difference Result 5896 states and 15707 transitions. [2021-06-05 18:24:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:24:55,384 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:55,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:55,390 INFO L225 Difference]: With dead ends: 5896 [2021-06-05 18:24:55,390 INFO L226 Difference]: Without dead ends: 5626 [2021-06-05 18:24:55,391 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 897.4ms TimeCoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:24:55,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-05 18:24:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4703. [2021-06-05 18:24:55,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 2.8058273075287112) internal successors, (13193), 4702 states have internal predecessors, (13193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 13193 transitions. [2021-06-05 18:24:55,449 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 13193 transitions. Word has length 150 [2021-06-05 18:24:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:55,449 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 13193 transitions. [2021-06-05 18:24:55,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 13193 transitions. [2021-06-05 18:24:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:55,453 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:55,453 INFO L554 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] [2021-06-05 18:24:55,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 18:24:55,654 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:55,654 INFO L82 PathProgramCache]: Analyzing trace with hash 234045255, now seen corresponding path program 291 times [2021-06-05 18:24:55,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:55,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786707650] [2021-06-05 18:24:55,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:55,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786707650] [2021-06-05 18:24:55,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786707650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:55,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843074072] [2021-06-05 18:24:55,906 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 [2021-06-05 18:24:55,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:24:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:55,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:55,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:56,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843074072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:56,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:56,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:56,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989991729] [2021-06-05 18:24:56,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:56,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:56,200 INFO L87 Difference]: Start difference. First operand 4703 states and 13193 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:57,342 INFO L93 Difference]: Finished difference Result 5921 states and 15832 transitions. [2021-06-05 18:24:57,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:24:57,343 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 [2021-06-05 18:24:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:57,349 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 18:24:57,349 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 18:24:57,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1125.8ms TimeCoverageRelationStatistics Valid=1586, Invalid=4420, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:24:57,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 18:24:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4778. [2021-06-05 18:24:57,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4778 states, 4777 states have (on average 2.808875863512665) internal successors, (13418), 4777 states have internal predecessors, (13418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4778 states to 4778 states and 13418 transitions. [2021-06-05 18:24:57,420 INFO L78 Accepts]: Start accepts. Automaton has 4778 states and 13418 transitions. Word has length 150 [2021-06-05 18:24:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:57,420 INFO L482 AbstractCegarLoop]: Abstraction has 4778 states and 13418 transitions. [2021-06-05 18:24:57,420 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) [2021-06-05 18:24:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4778 states and 13418 transitions. [2021-06-05 18:24:57,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:57,424 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:57,424 INFO L554 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] [2021-06-05 18:24:57,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:24:57,625 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:57,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1062923819, now seen corresponding path program 292 times [2021-06-05 18:24:57,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:57,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449343400] [2021-06-05 18:24:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:57,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449343400] [2021-06-05 18:24:57,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449343400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:57,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636715075] [2021-06-05 18:24:57,871 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 [2021-06-05 18:24:57,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:24:57,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:57,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:57,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:58,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636715075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:58,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:58,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:24:58,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700863762] [2021-06-05 18:24:58,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:24:58,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:58,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:24:58,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:24:58,148 INFO L87 Difference]: Start difference. First operand 4778 states and 13418 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:24:59,125 INFO L93 Difference]: Finished difference Result 5991 states and 16077 transitions. [2021-06-05 18:24:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:24:59,126 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:24:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:24:59,131 INFO L225 Difference]: With dead ends: 5991 [2021-06-05 18:24:59,131 INFO L226 Difference]: Without dead ends: 5721 [2021-06-05 18:24:59,132 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=1584, Invalid=4116, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:24:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5721 states. [2021-06-05 18:24:59,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5721 to 4853. [2021-06-05 18:24:59,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4853 states, 4852 states have (on average 2.814921681780709) internal successors, (13658), 4852 states have internal predecessors, (13658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4853 states to 4853 states and 13658 transitions. [2021-06-05 18:24:59,192 INFO L78 Accepts]: Start accepts. Automaton has 4853 states and 13658 transitions. Word has length 150 [2021-06-05 18:24:59,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:24:59,192 INFO L482 AbstractCegarLoop]: Abstraction has 4853 states and 13658 transitions. [2021-06-05 18:24:59,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:24:59,192 INFO L276 IsEmpty]: Start isEmpty. Operand 4853 states and 13658 transitions. [2021-06-05 18:24:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:24:59,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:24:59,196 INFO L554 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] [2021-06-05 18:24:59,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 18:24:59,397 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:24:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:24:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash -633170235, now seen corresponding path program 293 times [2021-06-05 18:24:59,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:24:59,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285585310] [2021-06-05 18:24:59,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:24:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:24:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:59,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:24:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285585310] [2021-06-05 18:24:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285585310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:59,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20980562] [2021-06-05 18:24:59,652 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 [2021-06-05 18:24:59,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:24:59,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:24:59,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:24:59,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:24:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:24:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20980562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:24:59,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:24:59,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-06-05 18:24:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172837882] [2021-06-05 18:24:59,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:24:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:24:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:24:59,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:24:59,911 INFO L87 Difference]: Start difference. First operand 4853 states and 13658 transitions. Second operand has 30 states, 30 states have (on average 5.066666666666666) internal successors, (152), 30 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:01,200 INFO L93 Difference]: Finished difference Result 6569 states and 17703 transitions. [2021-06-05 18:25:01,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:25:01,200 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 [2021-06-05 18:25:01,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:01,205 INFO L225 Difference]: With dead ends: 6569 [2021-06-05 18:25:01,205 INFO L226 Difference]: Without dead ends: 5946 [2021-06-05 18:25:01,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 1223.5ms TimeCoverageRelationStatistics Valid=1760, Invalid=4882, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:25:01,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-06-05 18:25:01,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4928. [2021-06-05 18:25:01,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4928 states, 4927 states have (on average 2.8187538055611934) internal successors, (13888), 4927 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4928 states to 4928 states and 13888 transitions. [2021-06-05 18:25:01,254 INFO L78 Accepts]: Start accepts. Automaton has 4928 states and 13888 transitions. Word has length 150 [2021-06-05 18:25:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:01,254 INFO L482 AbstractCegarLoop]: Abstraction has 4928 states and 13888 transitions. [2021-06-05 18:25:01,255 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) [2021-06-05 18:25:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4928 states and 13888 transitions. [2021-06-05 18:25:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:01,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:01,258 INFO L554 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] [2021-06-05 18:25:01,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 18:25:01,459 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:01,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:01,459 INFO L82 PathProgramCache]: Analyzing trace with hash -690904365, now seen corresponding path program 294 times [2021-06-05 18:25:01,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:01,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460823633] [2021-06-05 18:25:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:01,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460823633] [2021-06-05 18:25:01,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460823633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:01,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449250697] [2021-06-05 18:25:01,713 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 [2021-06-05 18:25:01,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:01,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:01,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449250697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:01,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:01,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-06-05 18:25:01,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582829667] [2021-06-05 18:25:01,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 18:25:01,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:01,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 18:25:01,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:25:01,964 INFO L87 Difference]: Start difference. First operand 4928 states and 13888 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:02,975 INFO L93 Difference]: Finished difference Result 6798 states and 18421 transitions. [2021-06-05 18:25:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:25:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:02,983 INFO L225 Difference]: With dead ends: 6798 [2021-06-05 18:25:02,983 INFO L226 Difference]: Without dead ends: 6528 [2021-06-05 18:25:02,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 981.5ms TimeCoverageRelationStatistics Valid=1746, Invalid=4260, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:25:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2021-06-05 18:25:03,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 5108. [2021-06-05 18:25:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5108 states, 5107 states have (on average 2.8288623457998825) internal successors, (14447), 5107 states have internal predecessors, (14447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5108 states to 5108 states and 14447 transitions. [2021-06-05 18:25:03,044 INFO L78 Accepts]: Start accepts. Automaton has 5108 states and 14447 transitions. Word has length 150 [2021-06-05 18:25:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:03,044 INFO L482 AbstractCegarLoop]: Abstraction has 5108 states and 14447 transitions. [2021-06-05 18:25:03,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:03,044 INFO L276 IsEmpty]: Start isEmpty. Operand 5108 states and 14447 transitions. [2021-06-05 18:25:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-06-05 18:25:03,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:03,048 INFO L554 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] [2021-06-05 18:25:03,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 18:25:03,249 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash -668561115, now seen corresponding path program 295 times [2021-06-05 18:25:03,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:03,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174579380] [2021-06-05 18:25:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:03,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174579380] [2021-06-05 18:25:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174579380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035382215] [2021-06-05 18:25:03,555 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 [2021-06-05 18:25:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:03,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:25:03,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:03,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035382215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:03,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:03,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-06-05 18:25:03,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791980241] [2021-06-05 18:25:03,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:03,855 INFO L87 Difference]: Start difference. First operand 5108 states and 14447 transitions. Second operand has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:05,187 INFO L93 Difference]: Finished difference Result 6621 states and 17921 transitions. [2021-06-05 18:25:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:25:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 150 [2021-06-05 18:25:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:05,194 INFO L225 Difference]: With dead ends: 6621 [2021-06-05 18:25:05,194 INFO L226 Difference]: Without dead ends: 6046 [2021-06-05 18:25:05,195 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 1346.8ms TimeCoverageRelationStatistics Valid=1989, Invalid=5321, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:25:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2021-06-05 18:25:05,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 3403. [2021-06-05 18:25:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 3402 states have (on average 2.7389770723104054) internal successors, (9318), 3402 states have internal predecessors, (9318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 9318 transitions. [2021-06-05 18:25:05,242 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 9318 transitions. Word has length 150 [2021-06-05 18:25:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:05,242 INFO L482 AbstractCegarLoop]: Abstraction has 3403 states and 9318 transitions. [2021-06-05 18:25:05,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 4.935483870967742) internal successors, (153), 31 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 9318 transitions. [2021-06-05 18:25:05,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:05,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:05,245 INFO L554 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] [2021-06-05 18:25:05,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:05,445 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 771249274, now seen corresponding path program 296 times [2021-06-05 18:25:05,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:05,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508828947] [2021-06-05 18:25:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:05,776 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:05,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508828947] [2021-06-05 18:25:05,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508828947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:05,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888150217] [2021-06-05 18:25:05,776 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 [2021-06-05 18:25:05,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:05,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:06,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888150217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:06,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:06,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526577797] [2021-06-05 18:25:06,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:06,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:06,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:06,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:06,041 INFO L87 Difference]: Start difference. First operand 3403 states and 9318 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:06,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:06,636 INFO L93 Difference]: Finished difference Result 5021 states and 12757 transitions. [2021-06-05 18:25:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:25:06,636 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 [2021-06-05 18:25:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:06,641 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:25:06,641 INFO L226 Difference]: Without dead ends: 4751 [2021-06-05 18:25:06,641 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 732.2ms TimeCoverageRelationStatistics Valid=935, Invalid=2605, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:25:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-05 18:25:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3478. [2021-06-05 18:25:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3478 states, 3477 states have (on average 2.7446074201898187) internal successors, (9543), 3477 states have internal predecessors, (9543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 9543 transitions. [2021-06-05 18:25:06,682 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 9543 transitions. Word has length 155 [2021-06-05 18:25:06,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:06,682 INFO L482 AbstractCegarLoop]: Abstraction has 3478 states and 9543 transitions. [2021-06-05 18:25:06,682 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) [2021-06-05 18:25:06,682 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 9543 transitions. [2021-06-05 18:25:06,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:06,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:06,686 INFO L554 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] [2021-06-05 18:25:06,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 18:25:06,886 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1654301034, now seen corresponding path program 297 times [2021-06-05 18:25:06,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:06,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901651978] [2021-06-05 18:25:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:07,222 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:07,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901651978] [2021-06-05 18:25:07,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901651978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:07,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498982211] [2021-06-05 18:25:07,223 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 [2021-06-05 18:25:07,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:07,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:07,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:07,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498982211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:07,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:07,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19172260] [2021-06-05 18:25:07,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:07,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:07,527 INFO L87 Difference]: Start difference. First operand 3478 states and 9543 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:08,177 INFO L93 Difference]: Finished difference Result 5641 states and 14072 transitions. [2021-06-05 18:25:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:25:08,177 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 [2021-06-05 18:25:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:08,183 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 18:25:08,183 INFO L226 Difference]: Without dead ends: 5371 [2021-06-05 18:25:08,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:25:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-05 18:25:08,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 3553. [2021-06-05 18:25:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3553 states, 3552 states have (on average 2.75) internal successors, (9768), 3552 states have internal predecessors, (9768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:08,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3553 states to 3553 states and 9768 transitions. [2021-06-05 18:25:08,227 INFO L78 Accepts]: Start accepts. Automaton has 3553 states and 9768 transitions. Word has length 155 [2021-06-05 18:25:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:08,227 INFO L482 AbstractCegarLoop]: Abstraction has 3553 states and 9768 transitions. [2021-06-05 18:25:08,227 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) [2021-06-05 18:25:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3553 states and 9768 transitions. [2021-06-05 18:25:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:08,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:08,230 INFO L554 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] [2021-06-05 18:25:08,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:08,431 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -237908360, now seen corresponding path program 298 times [2021-06-05 18:25:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:08,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744184923] [2021-06-05 18:25:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:08,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:08,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744184923] [2021-06-05 18:25:08,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744184923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:08,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291485265] [2021-06-05 18:25:08,748 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 [2021-06-05 18:25:08,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:08,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:08,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:09,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291485265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:09,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:09,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982148019] [2021-06-05 18:25:09,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:09,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:09,039 INFO L87 Difference]: Start difference. First operand 3553 states and 9768 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:09,676 INFO L93 Difference]: Finished difference Result 5671 states and 14207 transitions. [2021-06-05 18:25:09,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:25:09,676 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 [2021-06-05 18:25:09,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:09,682 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:25:09,683 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:25:09,683 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 746.2ms TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:25:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:25:09,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 3628. [2021-06-05 18:25:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.7551695616211744) internal successors, (9993), 3627 states have internal predecessors, (9993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:09,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9993 transitions. [2021-06-05 18:25:09,730 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9993 transitions. Word has length 155 [2021-06-05 18:25:09,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:09,730 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9993 transitions. [2021-06-05 18:25:09,730 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) [2021-06-05 18:25:09,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9993 transitions. [2021-06-05 18:25:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:09,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:09,733 INFO L554 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] [2021-06-05 18:25:09,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:09,934 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:09,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:09,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1603438440, now seen corresponding path program 299 times [2021-06-05 18:25:09,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:09,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288549955] [2021-06-05 18:25:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:10,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288549955] [2021-06-05 18:25:10,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288549955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:10,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291200609] [2021-06-05 18:25:10,261 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 [2021-06-05 18:25:10,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:25:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:10,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291200609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:10,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:10,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:10,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597957073] [2021-06-05 18:25:10,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:10,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:10,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:10,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:10,541 INFO L87 Difference]: Start difference. First operand 3628 states and 9993 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:11,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:11,270 INFO L93 Difference]: Finished difference Result 5696 states and 14332 transitions. [2021-06-05 18:25:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:25:11,270 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 [2021-06-05 18:25:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:11,276 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 18:25:11,276 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 18:25:11,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:25:11,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 18:25:11,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 3703. [2021-06-05 18:25:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.760129659643436) internal successors, (10218), 3702 states have internal predecessors, (10218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:11,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 10218 transitions. [2021-06-05 18:25:11,335 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 10218 transitions. Word has length 155 [2021-06-05 18:25:11,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:11,335 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 10218 transitions. [2021-06-05 18:25:11,335 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) [2021-06-05 18:25:11,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 10218 transitions. [2021-06-05 18:25:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:11,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:11,338 INFO L554 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] [2021-06-05 18:25:11,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:11,539 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1809969674, now seen corresponding path program 300 times [2021-06-05 18:25:11,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:11,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520801902] [2021-06-05 18:25:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:11,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:11,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520801902] [2021-06-05 18:25:11,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520801902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:11,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172417890] [2021-06-05 18:25:11,847 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 [2021-06-05 18:25:11,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:11,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:11,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172417890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:12,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:12,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:12,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418405071] [2021-06-05 18:25:12,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:12,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:12,118 INFO L87 Difference]: Start difference. First operand 3703 states and 10218 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:12,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:12,796 INFO L93 Difference]: Finished difference Result 5721 states and 14457 transitions. [2021-06-05 18:25:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:25:12,796 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 [2021-06-05 18:25:12,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:12,801 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 18:25:12,801 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 18:25:12,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 759.5ms TimeCoverageRelationStatistics Valid=1021, Invalid=3139, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:25:12,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 18:25:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 3778. [2021-06-05 18:25:12,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.7648927720413026) internal successors, (10443), 3777 states have internal predecessors, (10443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:12,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10443 transitions. [2021-06-05 18:25:12,848 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10443 transitions. Word has length 155 [2021-06-05 18:25:12,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:12,849 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10443 transitions. [2021-06-05 18:25:12,849 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) [2021-06-05 18:25:12,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10443 transitions. [2021-06-05 18:25:12,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:12,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:12,852 INFO L554 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] [2021-06-05 18:25:13,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2021-06-05 18:25:13,052 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1842623206, now seen corresponding path program 301 times [2021-06-05 18:25:13,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:13,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232406303] [2021-06-05 18:25:13,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:13,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232406303] [2021-06-05 18:25:13,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232406303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:13,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329633858] [2021-06-05 18:25:13,388 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 [2021-06-05 18:25:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:13,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329633858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:13,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:13,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:13,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773295270] [2021-06-05 18:25:13,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:13,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:13,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:13,667 INFO L87 Difference]: Start difference. First operand 3778 states and 10443 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:14,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:14,464 INFO L93 Difference]: Finished difference Result 5746 states and 14582 transitions. [2021-06-05 18:25:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:25:14,464 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 [2021-06-05 18:25:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:14,470 INFO L225 Difference]: With dead ends: 5746 [2021-06-05 18:25:14,470 INFO L226 Difference]: Without dead ends: 5476 [2021-06-05 18:25:14,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 887.3ms TimeCoverageRelationStatistics Valid=1045, Invalid=3377, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:25:14,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5476 states. [2021-06-05 18:25:14,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5476 to 3853. [2021-06-05 18:25:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3853 states, 3852 states have (on average 2.769470404984424) internal successors, (10668), 3852 states have internal predecessors, (10668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 10668 transitions. [2021-06-05 18:25:14,519 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 10668 transitions. Word has length 155 [2021-06-05 18:25:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:14,519 INFO L482 AbstractCegarLoop]: Abstraction has 3853 states and 10668 transitions. [2021-06-05 18:25:14,519 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) [2021-06-05 18:25:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 10668 transitions. [2021-06-05 18:25:14,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:14,522 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:14,522 INFO L554 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] [2021-06-05 18:25:14,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-05 18:25:14,723 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:14,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1796076276, now seen corresponding path program 302 times [2021-06-05 18:25:14,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:14,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132724996] [2021-06-05 18:25:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:15,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132724996] [2021-06-05 18:25:15,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132724996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044573204] [2021-06-05 18:25:15,016 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 [2021-06-05 18:25:15,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:15,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:15,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:15,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044573204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:15,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:15,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:15,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841533782] [2021-06-05 18:25:15,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:15,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:15,300 INFO L87 Difference]: Start difference. First operand 3853 states and 10668 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:16,060 INFO L93 Difference]: Finished difference Result 5771 states and 14707 transitions. [2021-06-05 18:25:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:25:16,060 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 [2021-06-05 18:25:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:16,066 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 18:25:16,066 INFO L226 Difference]: Without dead ends: 5501 [2021-06-05 18:25:16,067 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 809.8ms TimeCoverageRelationStatistics Valid=1067, Invalid=3355, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:25:16,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-05 18:25:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 3928. [2021-06-05 18:25:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.7738731856378913) internal successors, (10893), 3927 states have internal predecessors, (10893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10893 transitions. [2021-06-05 18:25:16,116 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10893 transitions. Word has length 155 [2021-06-05 18:25:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10893 transitions. [2021-06-05 18:25:16,116 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) [2021-06-05 18:25:16,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10893 transitions. [2021-06-05 18:25:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:16,120 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:16,120 INFO L554 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] [2021-06-05 18:25:16,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 18:25:16,320 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:16,321 INFO L82 PathProgramCache]: Analyzing trace with hash 877691876, now seen corresponding path program 303 times [2021-06-05 18:25:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:16,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418604158] [2021-06-05 18:25:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:16,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418604158] [2021-06-05 18:25:16,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418604158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:16,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120751220] [2021-06-05 18:25:16,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:25:16,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:16,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:16,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120751220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:16,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:16,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:16,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126988679] [2021-06-05 18:25:16,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:16,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:16,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:16,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:16,940 INFO L87 Difference]: Start difference. First operand 3928 states and 10893 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:17,782 INFO L93 Difference]: Finished difference Result 5796 states and 14832 transitions. [2021-06-05 18:25:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:25:17,783 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 [2021-06-05 18:25:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:17,788 INFO L225 Difference]: With dead ends: 5796 [2021-06-05 18:25:17,789 INFO L226 Difference]: Without dead ends: 5526 [2021-06-05 18:25:17,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 926.1ms TimeCoverageRelationStatistics Valid=1093, Invalid=3599, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:25:17,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5526 states. [2021-06-05 18:25:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5526 to 4003. [2021-06-05 18:25:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7781109445277363) internal successors, (11118), 4002 states have internal predecessors, (11118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:17,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11118 transitions. [2021-06-05 18:25:17,840 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11118 transitions. Word has length 155 [2021-06-05 18:25:17,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:17,840 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11118 transitions. [2021-06-05 18:25:17,840 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) [2021-06-05 18:25:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11118 transitions. [2021-06-05 18:25:17,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:17,843 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:17,843 INFO L554 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] [2021-06-05 18:25:18,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-05 18:25:18,044 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash -898998926, now seen corresponding path program 304 times [2021-06-05 18:25:18,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:18,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728972870] [2021-06-05 18:25:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:18,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:18,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728972870] [2021-06-05 18:25:18,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728972870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:18,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29849922] [2021-06-05 18:25:18,343 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 [2021-06-05 18:25:18,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:18,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:18,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:18,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:18,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29849922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:18,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:18,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799137652] [2021-06-05 18:25:18,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:18,610 INFO L87 Difference]: Start difference. First operand 4003 states and 11118 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:19,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:19,380 INFO L93 Difference]: Finished difference Result 5821 states and 14957 transitions. [2021-06-05 18:25:19,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:25:19,380 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 [2021-06-05 18:25:19,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:19,386 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 18:25:19,386 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 18:25:19,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 833.4ms TimeCoverageRelationStatistics Valid=1129, Invalid=3563, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:25:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 18:25:19,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4078. [2021-06-05 18:25:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.7821927888153053) internal successors, (11343), 4077 states have internal predecessors, (11343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11343 transitions. [2021-06-05 18:25:19,441 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11343 transitions. Word has length 155 [2021-06-05 18:25:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:19,441 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11343 transitions. [2021-06-05 18:25:19,441 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) [2021-06-05 18:25:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11343 transitions. [2021-06-05 18:25:19,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:19,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:19,444 INFO L554 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] [2021-06-05 18:25:19,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 18:25:19,645 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:19,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:19,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1200642658, now seen corresponding path program 305 times [2021-06-05 18:25:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:19,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542237739] [2021-06-05 18:25:19,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:19,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:19,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542237739] [2021-06-05 18:25:19,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542237739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:19,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406416289] [2021-06-05 18:25:19,945 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 [2021-06-05 18:25:20,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:25:20,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:20,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406416289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:20,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:20,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:20,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168746429] [2021-06-05 18:25:20,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:20,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:20,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:20,220 INFO L87 Difference]: Start difference. First operand 4078 states and 11343 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:21,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:21,090 INFO L93 Difference]: Finished difference Result 5846 states and 15082 transitions. [2021-06-05 18:25:21,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:25:21,091 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 [2021-06-05 18:25:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:21,096 INFO L225 Difference]: With dead ends: 5846 [2021-06-05 18:25:21,096 INFO L226 Difference]: Without dead ends: 5576 [2021-06-05 18:25:21,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=1157, Invalid=3813, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:25:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-06-05 18:25:21,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 4153. [2021-06-05 18:25:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.786127167630058) internal successors, (11568), 4152 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11568 transitions. [2021-06-05 18:25:21,148 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11568 transitions. Word has length 155 [2021-06-05 18:25:21,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:21,148 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11568 transitions. [2021-06-05 18:25:21,148 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) [2021-06-05 18:25:21,148 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11568 transitions. [2021-06-05 18:25:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:21,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:21,152 INFO L554 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] [2021-06-05 18:25:21,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-05 18:25:21,352 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:21,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:21,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1584124560, now seen corresponding path program 306 times [2021-06-05 18:25:21,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:21,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911648319] [2021-06-05 18:25:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:21,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:21,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911648319] [2021-06-05 18:25:21,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911648319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:21,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476622961] [2021-06-05 18:25:21,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:25:21,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:21,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:21,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476622961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:21,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:21,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:21,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561864595] [2021-06-05 18:25:21,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:21,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:21,920 INFO L87 Difference]: Start difference. First operand 4153 states and 11568 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:22,738 INFO L93 Difference]: Finished difference Result 5871 states and 15207 transitions. [2021-06-05 18:25:22,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:25:22,738 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 [2021-06-05 18:25:22,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:22,744 INFO L225 Difference]: With dead ends: 5871 [2021-06-05 18:25:22,744 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 18:25:22,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 864.9ms TimeCoverageRelationStatistics Valid=1207, Invalid=3763, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:25:22,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 18:25:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-05 18:25:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7899219304471257) internal successors, (11793), 4227 states have internal predecessors, (11793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:22,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11793 transitions. [2021-06-05 18:25:22,797 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11793 transitions. Word has length 155 [2021-06-05 18:25:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:22,797 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11793 transitions. [2021-06-05 18:25:22,797 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) [2021-06-05 18:25:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11793 transitions. [2021-06-05 18:25:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:22,801 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:22,801 INFO L554 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] [2021-06-05 18:25:23,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 18:25:23,001 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:23,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:23,002 INFO L82 PathProgramCache]: Analyzing trace with hash -944466336, now seen corresponding path program 307 times [2021-06-05 18:25:23,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:23,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364598211] [2021-06-05 18:25:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:23,288 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:23,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364598211] [2021-06-05 18:25:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364598211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598787959] [2021-06-05 18:25:23,288 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 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 [2021-06-05 18:25:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:23,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:23,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598787959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:23,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:23,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:23,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469683601] [2021-06-05 18:25:23,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:23,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:23,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:23,566 INFO L87 Difference]: Start difference. First operand 4228 states and 11793 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:24,530 INFO L93 Difference]: Finished difference Result 5896 states and 15332 transitions. [2021-06-05 18:25:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:25:24,531 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 [2021-06-05 18:25:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:24,537 INFO L225 Difference]: With dead ends: 5896 [2021-06-05 18:25:24,537 INFO L226 Difference]: Without dead ends: 5626 [2021-06-05 18:25:24,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 998.6ms TimeCoverageRelationStatistics Valid=1237, Invalid=4019, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:25:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5626 states. [2021-06-05 18:25:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5626 to 4303. [2021-06-05 18:25:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.793584379358438) internal successors, (12018), 4302 states have internal predecessors, (12018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 12018 transitions. [2021-06-05 18:25:24,591 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 12018 transitions. Word has length 155 [2021-06-05 18:25:24,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:24,592 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 12018 transitions. [2021-06-05 18:25:24,592 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) [2021-06-05 18:25:24,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 12018 transitions. [2021-06-05 18:25:24,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:24,595 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:24,595 INFO L554 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] [2021-06-05 18:25:24,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:24,796 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:24,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:24,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1719385362, now seen corresponding path program 308 times [2021-06-05 18:25:24,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:24,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708924513] [2021-06-05 18:25:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:25,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708924513] [2021-06-05 18:25:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708924513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032594279] [2021-06-05 18:25:25,069 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 [2021-06-05 18:25:25,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:25,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032594279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:25,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:25,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638815955] [2021-06-05 18:25:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:25,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:25,323 INFO L87 Difference]: Start difference. First operand 4303 states and 12018 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:26,175 INFO L93 Difference]: Finished difference Result 5921 states and 15457 transitions. [2021-06-05 18:25:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:25:26,176 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 [2021-06-05 18:25:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:26,182 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 18:25:26,182 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 18:25:26,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 864.7ms TimeCoverageRelationStatistics Valid=1301, Invalid=3955, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:25:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 18:25:26,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4378. [2021-06-05 18:25:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7971213159698425) internal successors, (12243), 4377 states have internal predecessors, (12243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:26,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12243 transitions. [2021-06-05 18:25:26,239 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12243 transitions. Word has length 155 [2021-06-05 18:25:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:26,239 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12243 transitions. [2021-06-05 18:25:26,240 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) [2021-06-05 18:25:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12243 transitions. [2021-06-05 18:25:26,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:26,243 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:26,243 INFO L554 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] [2021-06-05 18:25:26,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 18:25:26,444 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:26,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:26,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2121668574, now seen corresponding path program 309 times [2021-06-05 18:25:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:26,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927213600] [2021-06-05 18:25:26,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:26,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:26,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927213600] [2021-06-05 18:25:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927213600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473734119] [2021-06-05 18:25:26,748 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 [2021-06-05 18:25:26,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:27,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473734119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:27,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:27,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:27,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133126002] [2021-06-05 18:25:27,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:27,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:27,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:27,029 INFO L87 Difference]: Start difference. First operand 4378 states and 12243 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:28,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:28,061 INFO L93 Difference]: Finished difference Result 5946 states and 15582 transitions. [2021-06-05 18:25:28,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:25:28,062 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 [2021-06-05 18:25:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:28,068 INFO L225 Difference]: With dead ends: 5946 [2021-06-05 18:25:28,068 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 18:25:28,069 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 1031.3ms TimeCoverageRelationStatistics Valid=1333, Invalid=4217, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:25:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 18:25:28,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4453. [2021-06-05 18:25:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.8005390835579513) internal successors, (12468), 4452 states have internal predecessors, (12468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12468 transitions. [2021-06-05 18:25:28,127 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12468 transitions. Word has length 155 [2021-06-05 18:25:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:28,127 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12468 transitions. [2021-06-05 18:25:28,127 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) [2021-06-05 18:25:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12468 transitions. [2021-06-05 18:25:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:28,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:28,131 INFO L554 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] [2021-06-05 18:25:28,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:28,331 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1295286804, now seen corresponding path program 310 times [2021-06-05 18:25:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:28,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298357662] [2021-06-05 18:25:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:28,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:28,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298357662] [2021-06-05 18:25:28,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298357662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:28,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169635389] [2021-06-05 18:25:28,602 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 [2021-06-05 18:25:28,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:28,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:28,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:28,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169635389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:28,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:28,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267482248] [2021-06-05 18:25:28,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:28,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:28,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:28,853 INFO L87 Difference]: Start difference. First operand 4453 states and 12468 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:29,809 INFO L93 Difference]: Finished difference Result 5971 states and 15707 transitions. [2021-06-05 18:25:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:25:29,810 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 [2021-06-05 18:25:29,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:29,816 INFO L225 Difference]: With dead ends: 5971 [2021-06-05 18:25:29,816 INFO L226 Difference]: Without dead ends: 5701 [2021-06-05 18:25:29,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=1411, Invalid=4139, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:25:29,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5701 states. [2021-06-05 18:25:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5701 to 4528. [2021-06-05 18:25:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.803843605036448) internal successors, (12693), 4527 states have internal predecessors, (12693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12693 transitions. [2021-06-05 18:25:29,875 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12693 transitions. Word has length 155 [2021-06-05 18:25:29,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:29,875 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12693 transitions. [2021-06-05 18:25:29,875 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) [2021-06-05 18:25:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12693 transitions. [2021-06-05 18:25:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:29,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:29,879 INFO L554 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] [2021-06-05 18:25:30,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 18:25:30,079 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2099625692, now seen corresponding path program 311 times [2021-06-05 18:25:30,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:30,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933626434] [2021-06-05 18:25:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:30,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933626434] [2021-06-05 18:25:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933626434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:30,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758013070] [2021-06-05 18:25:30,358 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 [2021-06-05 18:25:30,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:25:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:30,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758013070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:30,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:30,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:30,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987432901] [2021-06-05 18:25:30,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:30,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:30,627 INFO L87 Difference]: Start difference. First operand 4528 states and 12693 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:31,723 INFO L93 Difference]: Finished difference Result 5996 states and 15832 transitions. [2021-06-05 18:25:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:25:31,724 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 [2021-06-05 18:25:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:31,728 INFO L225 Difference]: With dead ends: 5996 [2021-06-05 18:25:31,728 INFO L226 Difference]: Without dead ends: 5726 [2021-06-05 18:25:31,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1080.1ms TimeCoverageRelationStatistics Valid=1445, Invalid=4407, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:25:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5726 states. [2021-06-05 18:25:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5726 to 4603. [2021-06-05 18:25:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.8070404172099086) internal successors, (12918), 4602 states have internal predecessors, (12918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12918 transitions. [2021-06-05 18:25:31,782 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12918 transitions. Word has length 155 [2021-06-05 18:25:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:31,783 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12918 transitions. [2021-06-05 18:25:31,783 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) [2021-06-05 18:25:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12918 transitions. [2021-06-05 18:25:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:31,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:31,787 INFO L554 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] [2021-06-05 18:25:31,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:31,987 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:31,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:31,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1670561386, now seen corresponding path program 312 times [2021-06-05 18:25:31,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:31,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465647508] [2021-06-05 18:25:31,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:32,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:32,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465647508] [2021-06-05 18:25:32,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465647508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:32,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366114831] [2021-06-05 18:25:32,254 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 [2021-06-05 18:25:32,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:32,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366114831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:32,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:32,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:32,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736913345] [2021-06-05 18:25:32,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:32,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:32,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:32,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:32,522 INFO L87 Difference]: Start difference. First operand 4603 states and 12918 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:33,486 INFO L93 Difference]: Finished difference Result 6021 states and 15957 transitions. [2021-06-05 18:25:33,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:25:33,487 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 [2021-06-05 18:25:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:33,493 INFO L225 Difference]: With dead ends: 6021 [2021-06-05 18:25:33,493 INFO L226 Difference]: Without dead ends: 5751 [2021-06-05 18:25:33,494 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 928.4ms TimeCoverageRelationStatistics Valid=1537, Invalid=4315, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:25:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5751 states. [2021-06-05 18:25:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5751 to 4678. [2021-06-05 18:25:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.8101347017318794) internal successors, (13143), 4677 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:33,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 13143 transitions. [2021-06-05 18:25:33,555 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 13143 transitions. Word has length 155 [2021-06-05 18:25:33,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:33,555 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 13143 transitions. [2021-06-05 18:25:33,555 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) [2021-06-05 18:25:33,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 13143 transitions. [2021-06-05 18:25:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:33,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:33,559 INFO L554 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] [2021-06-05 18:25:33,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:33,760 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash 984378202, now seen corresponding path program 313 times [2021-06-05 18:25:33,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:33,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532775020] [2021-06-05 18:25:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:34,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532775020] [2021-06-05 18:25:34,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532775020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:34,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455589884] [2021-06-05 18:25:34,058 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 [2021-06-05 18:25:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:34,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:34,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:34,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455589884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:34,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:34,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:34,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067796100] [2021-06-05 18:25:34,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:34,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:34,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:34,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:34,326 INFO L87 Difference]: Start difference. First operand 4678 states and 13143 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:35,515 INFO L93 Difference]: Finished difference Result 6046 states and 16082 transitions. [2021-06-05 18:25:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:25:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-06-05 18:25:35,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:35,522 INFO L225 Difference]: With dead ends: 6046 [2021-06-05 18:25:35,522 INFO L226 Difference]: Without dead ends: 5776 [2021-06-05 18:25:35,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 1153.5ms TimeCoverageRelationStatistics Valid=1573, Invalid=4589, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:25:35,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5776 states. [2021-06-05 18:25:35,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5776 to 4753. [2021-06-05 18:25:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.813131313131313) internal successors, (13368), 4752 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13368 transitions. [2021-06-05 18:25:35,586 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13368 transitions. Word has length 155 [2021-06-05 18:25:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:35,586 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13368 transitions. [2021-06-05 18:25:35,586 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) [2021-06-05 18:25:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13368 transitions. [2021-06-05 18:25:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:35,590 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:35,590 INFO L554 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] [2021-06-05 18:25:35,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-05 18:25:35,791 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 899343464, now seen corresponding path program 314 times [2021-06-05 18:25:35,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:35,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955283534] [2021-06-05 18:25:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:36,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955283534] [2021-06-05 18:25:36,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955283534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:36,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707223291] [2021-06-05 18:25:36,072 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 [2021-06-05 18:25:36,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707223291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:36,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:36,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:36,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568434597] [2021-06-05 18:25:36,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:36,337 INFO L87 Difference]: Start difference. First operand 4753 states and 13368 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:37,371 INFO L93 Difference]: Finished difference Result 6071 states and 16207 transitions. [2021-06-05 18:25:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:25:37,371 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 [2021-06-05 18:25:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:37,378 INFO L225 Difference]: With dead ends: 6071 [2021-06-05 18:25:37,378 INFO L226 Difference]: Without dead ends: 5801 [2021-06-05 18:25:37,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=1679, Invalid=4483, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:25:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5801 states. [2021-06-05 18:25:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5801 to 4828. [2021-06-05 18:25:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.8160348042262275) internal successors, (13593), 4827 states have internal predecessors, (13593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13593 transitions. [2021-06-05 18:25:37,443 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13593 transitions. Word has length 155 [2021-06-05 18:25:37,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:37,443 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13593 transitions. [2021-06-05 18:25:37,443 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) [2021-06-05 18:25:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13593 transitions. [2021-06-05 18:25:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:37,447 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:37,447 INFO L554 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] [2021-06-05 18:25:37,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 18:25:37,648 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:37,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:37,648 INFO L82 PathProgramCache]: Analyzing trace with hash 831192408, now seen corresponding path program 315 times [2021-06-05 18:25:37,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:37,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49942748] [2021-06-05 18:25:37,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:37,917 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:37,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:37,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49942748] [2021-06-05 18:25:37,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49942748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:37,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418610001] [2021-06-05 18:25:37,918 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 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 [2021-06-05 18:25:37,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-05 18:25:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:37,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:37,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418610001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:38,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:38,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:38,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351246648] [2021-06-05 18:25:38,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:38,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:38,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:38,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:38,199 INFO L87 Difference]: Start difference. First operand 4828 states and 13593 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:39,448 INFO L93 Difference]: Finished difference Result 6096 states and 16332 transitions. [2021-06-05 18:25:39,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:25:39,449 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 [2021-06-05 18:25:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:39,454 INFO L225 Difference]: With dead ends: 6096 [2021-06-05 18:25:39,454 INFO L226 Difference]: Without dead ends: 5826 [2021-06-05 18:25:39,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1163.6ms TimeCoverageRelationStatistics Valid=1717, Invalid=4763, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:25:39,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-05 18:25:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 4903. [2021-06-05 18:25:39,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.8188494492044063) internal successors, (13818), 4902 states have internal predecessors, (13818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13818 transitions. [2021-06-05 18:25:39,516 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13818 transitions. Word has length 155 [2021-06-05 18:25:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:39,516 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13818 transitions. [2021-06-05 18:25:39,516 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) [2021-06-05 18:25:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13818 transitions. [2021-06-05 18:25:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:39,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:39,520 INFO L554 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] [2021-06-05 18:25:39,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 18:25:39,721 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:39,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:39,721 INFO L82 PathProgramCache]: Analyzing trace with hash -465776666, now seen corresponding path program 316 times [2021-06-05 18:25:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:39,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659934644] [2021-06-05 18:25:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:39,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:39,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659934644] [2021-06-05 18:25:39,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659934644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:39,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279866985] [2021-06-05 18:25:39,993 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 [2021-06-05 18:25:40,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:40,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:40,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:40,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:40,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279866985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:40,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:40,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:40,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988804306] [2021-06-05 18:25:40,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:40,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=689, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:40,240 INFO L87 Difference]: Start difference. First operand 4903 states and 13818 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:41,298 INFO L93 Difference]: Finished difference Result 6166 states and 16577 transitions. [2021-06-05 18:25:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:25:41,298 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 [2021-06-05 18:25:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:41,304 INFO L225 Difference]: With dead ends: 6166 [2021-06-05 18:25:41,304 INFO L226 Difference]: Without dead ends: 5896 [2021-06-05 18:25:41,305 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 996.2ms TimeCoverageRelationStatistics Valid=1837, Invalid=4643, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:25:41,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5896 states. [2021-06-05 18:25:41,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5896 to 4978. [2021-06-05 18:25:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.824593128390597) internal successors, (14058), 4977 states have internal predecessors, (14058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:41,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 14058 transitions. [2021-06-05 18:25:41,401 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 14058 transitions. Word has length 155 [2021-06-05 18:25:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:41,401 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 14058 transitions. [2021-06-05 18:25:41,402 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) [2021-06-05 18:25:41,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 14058 transitions. [2021-06-05 18:25:41,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:41,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:41,406 INFO L554 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] [2021-06-05 18:25:41,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 18:25:41,606 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:41,607 INFO L82 PathProgramCache]: Analyzing trace with hash -36023082, now seen corresponding path program 317 times [2021-06-05 18:25:41,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:41,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243328274] [2021-06-05 18:25:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:41,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:41,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243328274] [2021-06-05 18:25:41,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243328274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:41,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015299040] [2021-06-05 18:25:41,881 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 [2021-06-05 18:25:41,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-05 18:25:41,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:42,145 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:42,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015299040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:42,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:42,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:42,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65000293] [2021-06-05 18:25:42,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:42,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:42,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:42,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:42,146 INFO L87 Difference]: Start difference. First operand 4978 states and 14058 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:43,465 INFO L93 Difference]: Finished difference Result 6744 states and 18203 transitions. [2021-06-05 18:25:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:25:43,466 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 [2021-06-05 18:25:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:43,472 INFO L225 Difference]: With dead ends: 6744 [2021-06-05 18:25:43,473 INFO L226 Difference]: Without dead ends: 6121 [2021-06-05 18:25:43,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 1253.6ms TimeCoverageRelationStatistics Valid=1898, Invalid=5242, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:25:43,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2021-06-05 18:25:43,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 5053. [2021-06-05 18:25:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.8281868566904196) internal successors, (14288), 5052 states have internal predecessors, (14288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:43,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14288 transitions. [2021-06-05 18:25:43,529 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14288 transitions. Word has length 155 [2021-06-05 18:25:43,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:43,530 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14288 transitions. [2021-06-05 18:25:43,530 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) [2021-06-05 18:25:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14288 transitions. [2021-06-05 18:25:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:43,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:43,534 INFO L554 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] [2021-06-05 18:25:43,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:43,734 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:43,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:43,735 INFO L82 PathProgramCache]: Analyzing trace with hash -93757212, now seen corresponding path program 318 times [2021-06-05 18:25:43,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:43,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108593191] [2021-06-05 18:25:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:44,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108593191] [2021-06-05 18:25:44,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108593191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:44,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968732496] [2021-06-05 18:25:44,003 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 [2021-06-05 18:25:44,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-05 18:25:44,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:44,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:44,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:44,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968732496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:44,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:44,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-06-05 18:25:44,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779736254] [2021-06-05 18:25:44,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 18:25:44,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:44,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 18:25:44,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:25:44,284 INFO L87 Difference]: Start difference. First operand 5053 states and 14288 transitions. Second operand has 30 states, 30 states have (on average 5.166666666666667) internal successors, (155), 30 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:45,342 INFO L93 Difference]: Finished difference Result 6948 states and 18871 transitions. [2021-06-05 18:25:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:25:45,342 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 [2021-06-05 18:25:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:45,350 INFO L225 Difference]: With dead ends: 6948 [2021-06-05 18:25:45,350 INFO L226 Difference]: Without dead ends: 6678 [2021-06-05 18:25:45,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=2012, Invalid=4794, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:25:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6678 states. [2021-06-05 18:25:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6678 to 5233. [2021-06-05 18:25:45,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.8377293577981653) internal successors, (14847), 5232 states have internal predecessors, (14847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 14847 transitions. [2021-06-05 18:25:45,413 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 14847 transitions. Word has length 155 [2021-06-05 18:25:45,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:45,413 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 14847 transitions. [2021-06-05 18:25:45,413 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) [2021-06-05 18:25:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 14847 transitions. [2021-06-05 18:25:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-06-05 18:25:45,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:45,417 INFO L554 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] [2021-06-05 18:25:45,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 18:25:45,618 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:45,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:45,618 INFO L82 PathProgramCache]: Analyzing trace with hash -71413962, now seen corresponding path program 319 times [2021-06-05 18:25:45,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:45,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637841096] [2021-06-05 18:25:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637841096] [2021-06-05 18:25:45,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637841096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415319725] [2021-06-05 18:25:45,890 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 [2021-06-05 18:25:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:25:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415319725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:46,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:46,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-06-05 18:25:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289519965] [2021-06-05 18:25:46,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:46,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:46,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:46,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:46,184 INFO L87 Difference]: Start difference. First operand 5233 states and 14847 transitions. Second operand has 31 states, 31 states have (on average 5.064516129032258) internal successors, (157), 31 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:47,457 INFO L93 Difference]: Finished difference Result 6410 states and 17521 transitions. [2021-06-05 18:25:47,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:25:47,457 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 [2021-06-05 18:25:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:47,463 INFO L225 Difference]: With dead ends: 6410 [2021-06-05 18:25:47,464 INFO L226 Difference]: Without dead ends: 5921 [2021-06-05 18:25:47,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1246.1ms TimeCoverageRelationStatistics Valid=2056, Invalid=5084, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:25:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5921 states. [2021-06-05 18:25:47,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5921 to 5178. [2021-06-05 18:25:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.836198570600734) internal successors, (14683), 5177 states have internal predecessors, (14683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 14683 transitions. [2021-06-05 18:25:47,524 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 14683 transitions. Word has length 155 [2021-06-05 18:25:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:47,524 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 14683 transitions. [2021-06-05 18:25:47,524 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) [2021-06-05 18:25:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 14683 transitions. [2021-06-05 18:25:47,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:47,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:47,529 INFO L554 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] [2021-06-05 18:25:47,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:47,729 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -842046282, now seen corresponding path program 320 times [2021-06-05 18:25:47,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:47,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527227476] [2021-06-05 18:25:47,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:48,070 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:48,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:48,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527227476] [2021-06-05 18:25:48,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527227476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:48,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457134427] [2021-06-05 18:25:48,070 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 [2021-06-05 18:25:48,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:25:48,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457134427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:48,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:48,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 34 [2021-06-05 18:25:48,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276747482] [2021-06-05 18:25:48,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:25:48,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:25:48,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=870, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:25:48,391 INFO L87 Difference]: Start difference. First operand 5178 states and 14683 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 34 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:49,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:49,113 INFO L93 Difference]: Finished difference Result 6468 states and 17583 transitions. [2021-06-05 18:25:49,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:25:49,114 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 [2021-06-05 18:25:49,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:49,119 INFO L225 Difference]: With dead ends: 6468 [2021-06-05 18:25:49,119 INFO L226 Difference]: Without dead ends: 6134 [2021-06-05 18:25:49,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 857.0ms TimeCoverageRelationStatistics Valid=1165, Invalid=3125, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:25:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6134 states. [2021-06-05 18:25:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6134 to 5263. [2021-06-05 18:25:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5263 states, 5262 states have (on average 2.822690992018244) internal successors, (14853), 5262 states have internal predecessors, (14853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5263 states to 5263 states and 14853 transitions. [2021-06-05 18:25:49,177 INFO L78 Accepts]: Start accepts. Automaton has 5263 states and 14853 transitions. Word has length 160 [2021-06-05 18:25:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:49,177 INFO L482 AbstractCegarLoop]: Abstraction has 5263 states and 14853 transitions. [2021-06-05 18:25:49,177 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) [2021-06-05 18:25:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 5263 states and 14853 transitions. [2021-06-05 18:25:49,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:49,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:49,182 INFO L554 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] [2021-06-05 18:25:49,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 18:25:49,382 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:49,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:49,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1096521818, now seen corresponding path program 321 times [2021-06-05 18:25:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:49,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535102636] [2021-06-05 18:25:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:49,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:49,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535102636] [2021-06-05 18:25:49,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535102636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:49,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439164954] [2021-06-05 18:25:49,735 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 [2021-06-05 18:25:49,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:25:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:49,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:50,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439164954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:50,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:50,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:25:50,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502092119] [2021-06-05 18:25:50,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:50,019 INFO L87 Difference]: Start difference. First operand 5263 states and 14853 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:50,591 INFO L93 Difference]: Finished difference Result 7561 states and 19577 transitions. [2021-06-05 18:25:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:25:50,592 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 [2021-06-05 18:25:50,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:50,600 INFO L225 Difference]: With dead ends: 7561 [2021-06-05 18:25:50,601 INFO L226 Difference]: Without dead ends: 7291 [2021-06-05 18:25:50,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 729.8ms TimeCoverageRelationStatistics Valid=988, Invalid=2552, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:25:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7291 states. [2021-06-05 18:25:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7291 to 5278. [2021-06-05 18:25:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:50,664 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:50,664 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:50,665 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) [2021-06-05 18:25:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:50,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:50,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:50,669 INFO L554 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] [2021-06-05 18:25:50,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:50,869 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:50,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:50,870 INFO L82 PathProgramCache]: Analyzing trace with hash 251033930, now seen corresponding path program 322 times [2021-06-05 18:25:50,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:50,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267103667] [2021-06-05 18:25:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:51,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267103667] [2021-06-05 18:25:51,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267103667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:51,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169991367] [2021-06-05 18:25:51,239 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 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 [2021-06-05 18:25:51,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:25:51,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:51,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:51,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:51,553 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:51,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169991367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:51,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:51,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:25:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659297354] [2021-06-05 18:25:51,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:25:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:25:51,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:25:51,554 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:52,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:52,214 INFO L93 Difference]: Finished difference Result 7446 states and 19347 transitions. [2021-06-05 18:25:52,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:25:52,214 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 [2021-06-05 18:25:52,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:52,222 INFO L225 Difference]: With dead ends: 7446 [2021-06-05 18:25:52,222 INFO L226 Difference]: Without dead ends: 7176 [2021-06-05 18:25:52,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=1067, Invalid=2965, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:25:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7176 states. [2021-06-05 18:25:52,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7176 to 5278. [2021-06-05 18:25:52,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:52,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:52,286 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:52,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:52,286 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:52,287 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) [2021-06-05 18:25:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:52,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:52,291 INFO L554 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] [2021-06-05 18:25:52,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2021-06-05 18:25:52,491 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:52,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1654969128, now seen corresponding path program 323 times [2021-06-05 18:25:52,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:52,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110893420] [2021-06-05 18:25:52,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:52,829 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:52,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110893420] [2021-06-05 18:25:52,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110893420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:52,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293634844] [2021-06-05 18:25:52,829 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 [2021-06-05 18:25:52,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:25:52,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:52,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:52,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:53,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293634844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:53,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:53,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:25:53,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068075238] [2021-06-05 18:25:53,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:53,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:53,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:53,101 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:53,728 INFO L93 Difference]: Finished difference Result 7421 states and 19297 transitions. [2021-06-05 18:25:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:25:53,728 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 [2021-06-05 18:25:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:53,736 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 18:25:53,736 INFO L226 Difference]: Without dead ends: 7151 [2021-06-05 18:25:53,737 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 759.7ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:25:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-05 18:25:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5278. [2021-06-05 18:25:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:53,816 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:53,816 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:53,816 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) [2021-06-05 18:25:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:53,820 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:53,820 INFO L554 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] [2021-06-05 18:25:54,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 18:25:54,021 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -771917368, now seen corresponding path program 324 times [2021-06-05 18:25:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832540884] [2021-06-05 18:25:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:54,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:54,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832540884] [2021-06-05 18:25:54,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832540884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:54,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77834038] [2021-06-05 18:25:54,372 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 [2021-06-05 18:25:54,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:25:54,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:54,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:54,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:54,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77834038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:54,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:54,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:25:54,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830130669] [2021-06-05 18:25:54,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:25:54,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:54,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:25:54,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:25:54,663 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:55,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:55,396 INFO L93 Difference]: Finished difference Result 7371 states and 19197 transitions. [2021-06-05 18:25:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:25:55,396 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 [2021-06-05 18:25:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:55,404 INFO L225 Difference]: With dead ends: 7371 [2021-06-05 18:25:55,404 INFO L226 Difference]: Without dead ends: 7101 [2021-06-05 18:25:55,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 867.6ms TimeCoverageRelationStatistics Valid=1074, Invalid=3216, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:25:55,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-05 18:25:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5278. [2021-06-05 18:25:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:55,467 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:55,467 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:55,467 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) [2021-06-05 18:25:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:55,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:55,471 INFO L554 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] [2021-06-05 18:25:55,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable332,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:25:55,672 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1630840534, now seen corresponding path program 325 times [2021-06-05 18:25:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:55,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601835344] [2021-06-05 18:25:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:55,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:55,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601835344] [2021-06-05 18:25:55,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601835344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:55,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763676664] [2021-06-05 18:25:55,992 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 [2021-06-05 18:25:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:56,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763676664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:56,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:56,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:25:56,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85711561] [2021-06-05 18:25:56,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:56,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:56,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:56,284 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:56,951 INFO L93 Difference]: Finished difference Result 7321 states and 19097 transitions. [2021-06-05 18:25:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:25:56,952 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 [2021-06-05 18:25:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:56,960 INFO L225 Difference]: With dead ends: 7321 [2021-06-05 18:25:56,960 INFO L226 Difference]: Without dead ends: 7051 [2021-06-05 18:25:56,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 773.9ms TimeCoverageRelationStatistics Valid=1002, Invalid=3030, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:25:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-05 18:25:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5278. [2021-06-05 18:25:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:57,023 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:57,024 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:57,024 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) [2021-06-05 18:25:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:57,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:57,028 INFO L554 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] [2021-06-05 18:25:57,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 18:25:57,229 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:57,229 INFO L82 PathProgramCache]: Analyzing trace with hash -822779962, now seen corresponding path program 326 times [2021-06-05 18:25:57,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:57,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153459351] [2021-06-05 18:25:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:57,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153459351] [2021-06-05 18:25:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153459351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738940350] [2021-06-05 18:25:57,565 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 [2021-06-05 18:25:57,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:25:57,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:57,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738940350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:57,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:57,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:25:57,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455361755] [2021-06-05 18:25:57,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:25:57,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:25:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:25:57,848 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:25:58,699 INFO L93 Difference]: Finished difference Result 7271 states and 18997 transitions. [2021-06-05 18:25:58,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:25:58,699 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 [2021-06-05 18:25:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:25:58,705 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 18:25:58,706 INFO L226 Difference]: Without dead ends: 7001 [2021-06-05 18:25:58,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 928.1ms TimeCoverageRelationStatistics Valid=1097, Invalid=3459, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:25:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-05 18:25:58,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5278. [2021-06-05 18:25:58,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:25:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:25:58,764 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:25:58,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:25:58,764 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:25:58,764 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) [2021-06-05 18:25:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:25:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:25:58,769 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:25:58,769 INFO L554 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] [2021-06-05 18:25:58,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 18:25:58,969 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:25:58,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:25:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 58779220, now seen corresponding path program 327 times [2021-06-05 18:25:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:25:58,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306025411] [2021-06-05 18:25:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:25:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:25:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:59,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:25:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306025411] [2021-06-05 18:25:59,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306025411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:59,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034072196] [2021-06-05 18:25:59,284 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 [2021-06-05 18:25:59,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:25:59,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:25:59,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:25:59,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:25:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:25:59,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034072196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:25:59,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:25:59,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:25:59,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013719932] [2021-06-05 18:25:59,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:25:59,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:25:59,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:25:59,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:25:59,560 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:00,320 INFO L93 Difference]: Finished difference Result 7221 states and 18897 transitions. [2021-06-05 18:26:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:26:00,321 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 [2021-06-05 18:26:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:00,328 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 18:26:00,328 INFO L226 Difference]: Without dead ends: 6951 [2021-06-05 18:26:00,329 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 808.6ms TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:26:00,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-05 18:26:00,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5278. [2021-06-05 18:26:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:00,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:00,390 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:00,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:00,390 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:00,390 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) [2021-06-05 18:26:00,390 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:00,394 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:00,394 INFO L554 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] [2021-06-05 18:26:00,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 18:26:00,595 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash -583595196, now seen corresponding path program 328 times [2021-06-05 18:26:00,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:00,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210490102] [2021-06-05 18:26:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:00,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:00,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210490102] [2021-06-05 18:26:00,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210490102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:00,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583576806] [2021-06-05 18:26:00,920 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 [2021-06-05 18:26:01,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:01,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:01,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:01,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583576806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:01,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:01,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:01,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319498650] [2021-06-05 18:26:01,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:01,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:01,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:01,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:01,228 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:02,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:02,113 INFO L93 Difference]: Finished difference Result 7171 states and 18797 transitions. [2021-06-05 18:26:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:26:02,113 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 [2021-06-05 18:26:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:02,121 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 18:26:02,121 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 18:26:02,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 942.4ms TimeCoverageRelationStatistics Valid=1136, Invalid=3694, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:26:02,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 18:26:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5278. [2021-06-05 18:26:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:02,182 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:02,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:02,183 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:02,183 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) [2021-06-05 18:26:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:02,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:02,187 INFO L554 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] [2021-06-05 18:26:02,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 18:26:02,387 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -630142126, now seen corresponding path program 329 times [2021-06-05 18:26:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:02,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149239702] [2021-06-05 18:26:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:02,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149239702] [2021-06-05 18:26:02,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149239702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:02,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374987528] [2021-06-05 18:26:02,693 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 [2021-06-05 18:26:02,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:02,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:02,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:02,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:02,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374987528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:02,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:02,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422013805] [2021-06-05 18:26:02,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:02,957 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:03,825 INFO L93 Difference]: Finished difference Result 7121 states and 18697 transitions. [2021-06-05 18:26:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:26:03,825 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 [2021-06-05 18:26:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:03,832 INFO L225 Difference]: With dead ends: 7121 [2021-06-05 18:26:03,833 INFO L226 Difference]: Without dead ends: 6851 [2021-06-05 18:26:03,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 869.2ms TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:26:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-05 18:26:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5278. [2021-06-05 18:26:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:03,908 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:03,908 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:03,908 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) [2021-06-05 18:26:03,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:03,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:03,913 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:03,913 INFO L554 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] [2021-06-05 18:26:04,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2021-06-05 18:26:04,114 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1548526526, now seen corresponding path program 330 times [2021-06-05 18:26:04,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:04,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538787643] [2021-06-05 18:26:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538787643] [2021-06-05 18:26:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538787643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542678373] [2021-06-05 18:26:04,450 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 [2021-06-05 18:26:04,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:26:04,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:04,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:04,743 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:04,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542678373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:04,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:04,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:04,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945781665] [2021-06-05 18:26:04,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:04,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:04,744 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:05,708 INFO L93 Difference]: Finished difference Result 7071 states and 18597 transitions. [2021-06-05 18:26:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:26:05,708 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 [2021-06-05 18:26:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:05,716 INFO L225 Difference]: With dead ends: 7071 [2021-06-05 18:26:05,716 INFO L226 Difference]: Without dead ends: 6801 [2021-06-05 18:26:05,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1005.4ms TimeCoverageRelationStatistics Valid=1191, Invalid=3921, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:26:05,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-05 18:26:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-05 18:26:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:05,778 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:05,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:05,778 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:05,779 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) [2021-06-05 18:26:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:05,783 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:05,783 INFO L554 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] [2021-06-05 18:26:05,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:05,983 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 969749968, now seen corresponding path program 331 times [2021-06-05 18:26:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:05,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429844611] [2021-06-05 18:26:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:06,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429844611] [2021-06-05 18:26:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429844611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221746065] [2021-06-05 18:26:06,283 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 [2021-06-05 18:26:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:06,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:06,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221746065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:06,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:06,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:06,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001890817] [2021-06-05 18:26:06,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:06,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:06,574 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:07,424 INFO L93 Difference]: Finished difference Result 7021 states and 18497 transitions. [2021-06-05 18:26:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:26:07,424 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 [2021-06-05 18:26:07,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:07,432 INFO L225 Difference]: With dead ends: 7021 [2021-06-05 18:26:07,432 INFO L226 Difference]: Without dead ends: 6751 [2021-06-05 18:26:07,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 868.1ms TimeCoverageRelationStatistics Valid=1143, Invalid=3687, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:26:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-05 18:26:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5278. [2021-06-05 18:26:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:07,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:07,498 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:07,498 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) [2021-06-05 18:26:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:07,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:07,503 INFO L554 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] [2021-06-05 18:26:07,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:07,703 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:07,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:07,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1225575744, now seen corresponding path program 332 times [2021-06-05 18:26:07,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:07,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782191318] [2021-06-05 18:26:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:08,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782191318] [2021-06-05 18:26:08,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782191318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:08,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145230723] [2021-06-05 18:26:08,010 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 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 [2021-06-05 18:26:08,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:08,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:08,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:08,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:08,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145230723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:08,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:08,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:08,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175547437] [2021-06-05 18:26:08,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:08,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:08,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:08,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:08,285 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:09,317 INFO L93 Difference]: Finished difference Result 6971 states and 18397 transitions. [2021-06-05 18:26:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:26:09,318 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 [2021-06-05 18:26:09,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:09,326 INFO L225 Difference]: With dead ends: 6971 [2021-06-05 18:26:09,326 INFO L226 Difference]: Without dead ends: 6701 [2021-06-05 18:26:09,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1039.7ms TimeCoverageRelationStatistics Valid=1262, Invalid=4140, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:26:09,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-05 18:26:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 5278. [2021-06-05 18:26:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:09,403 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:09,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:09,403 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:09,403 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) [2021-06-05 18:26:09,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:09,408 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:09,408 INFO L554 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] [2021-06-05 18:26:09,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:09,608 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash 284624334, now seen corresponding path program 333 times [2021-06-05 18:26:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:09,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46988313] [2021-06-05 18:26:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:09,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46988313] [2021-06-05 18:26:09,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46988313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337445723] [2021-06-05 18:26:09,901 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 [2021-06-05 18:26:09,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:26:09,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:09,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:09,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:10,174 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:10,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337445723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:10,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:10,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:10,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181703440] [2021-06-05 18:26:10,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:10,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:10,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:10,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:10,175 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:11,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:11,073 INFO L93 Difference]: Finished difference Result 6921 states and 18297 transitions. [2021-06-05 18:26:11,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:26:11,073 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 [2021-06-05 18:26:11,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:11,081 INFO L225 Difference]: With dead ends: 6921 [2021-06-05 18:26:11,081 INFO L226 Difference]: Without dead ends: 6651 [2021-06-05 18:26:11,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 897.8ms TimeCoverageRelationStatistics Valid=1222, Invalid=3890, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:26:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-05 18:26:11,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 5278. [2021-06-05 18:26:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:11,141 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:11,141 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:11,141 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) [2021-06-05 18:26:11,141 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:11,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:11,146 INFO L554 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] [2021-06-05 18:26:11,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:11,346 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash 924282558, now seen corresponding path program 334 times [2021-06-05 18:26:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:11,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547240937] [2021-06-05 18:26:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:11,647 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:11,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547240937] [2021-06-05 18:26:11,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547240937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:11,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445132653] [2021-06-05 18:26:11,647 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 [2021-06-05 18:26:11,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:11,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445132653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:11,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:11,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:11,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027534665] [2021-06-05 18:26:11,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:11,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:11,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:11,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:11,924 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:13,014 INFO L93 Difference]: Finished difference Result 6871 states and 18197 transitions. [2021-06-05 18:26:13,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:26:13,015 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 [2021-06-05 18:26:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:13,022 INFO L225 Difference]: With dead ends: 6871 [2021-06-05 18:26:13,022 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 18:26:13,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1096.8ms TimeCoverageRelationStatistics Valid=1349, Invalid=4351, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:26:13,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 18:26:13,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 5278. [2021-06-05 18:26:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:13,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:13,081 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:13,081 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:13,081 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) [2021-06-05 18:26:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:13,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:13,086 INFO L554 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] [2021-06-05 18:26:13,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 18:26:13,286 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:13,286 INFO L82 PathProgramCache]: Analyzing trace with hash 149363532, now seen corresponding path program 335 times [2021-06-05 18:26:13,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:13,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652632366] [2021-06-05 18:26:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:13,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:13,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652632366] [2021-06-05 18:26:13,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652632366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:13,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887202262] [2021-06-05 18:26:13,583 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 [2021-06-05 18:26:13,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:13,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:13,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:13,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887202262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:13,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:13,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:13,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221248908] [2021-06-05 18:26:13,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:13,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:13,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:13,849 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:14,779 INFO L93 Difference]: Finished difference Result 6821 states and 18097 transitions. [2021-06-05 18:26:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:26:14,780 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 [2021-06-05 18:26:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:14,787 INFO L225 Difference]: With dead ends: 6821 [2021-06-05 18:26:14,787 INFO L226 Difference]: Without dead ends: 6551 [2021-06-05 18:26:14,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 924.5ms TimeCoverageRelationStatistics Valid=1317, Invalid=4085, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:26:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-05 18:26:14,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 5278. [2021-06-05 18:26:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:14,848 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:14,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:14,848 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:14,848 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) [2021-06-05 18:26:14,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:14,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:14,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:14,852 INFO L554 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] [2021-06-05 18:26:15,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-06-05 18:26:15,053 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:15,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:15,053 INFO L82 PathProgramCache]: Analyzing trace with hash -304549828, now seen corresponding path program 336 times [2021-06-05 18:26:15,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:15,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612758615] [2021-06-05 18:26:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:15,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:15,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612758615] [2021-06-05 18:26:15,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612758615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:15,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913108192] [2021-06-05 18:26:15,377 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 [2021-06-05 18:26:15,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:26:15,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:15,661 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:15,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913108192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:15,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:15,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:15,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954807753] [2021-06-05 18:26:15,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:15,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:15,662 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:16,763 INFO L93 Difference]: Finished difference Result 6771 states and 17997 transitions. [2021-06-05 18:26:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:26:16,763 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 [2021-06-05 18:26:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:16,770 INFO L225 Difference]: With dead ends: 6771 [2021-06-05 18:26:16,770 INFO L226 Difference]: Without dead ends: 6501 [2021-06-05 18:26:16,771 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=1452, Invalid=4554, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:26:16,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-05 18:26:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 5278. [2021-06-05 18:26:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:16,830 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:16,830 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:16,830 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) [2021-06-05 18:26:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:16,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:16,835 INFO L554 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] [2021-06-05 18:26:17,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 18:26:17,035 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:17,036 INFO L82 PathProgramCache]: Analyzing trace with hash 573462090, now seen corresponding path program 337 times [2021-06-05 18:26:17,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:17,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684939811] [2021-06-05 18:26:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:17,326 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:17,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:17,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684939811] [2021-06-05 18:26:17,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684939811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:17,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839810247] [2021-06-05 18:26:17,326 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 [2021-06-05 18:26:17,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:17,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:17,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:17,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839810247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:17,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:17,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:17,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858702059] [2021-06-05 18:26:17,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:17,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:17,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:17,588 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:18,571 INFO L93 Difference]: Finished difference Result 6721 states and 17897 transitions. [2021-06-05 18:26:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:26:18,572 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 [2021-06-05 18:26:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:18,578 INFO L225 Difference]: With dead ends: 6721 [2021-06-05 18:26:18,578 INFO L226 Difference]: Without dead ends: 6451 [2021-06-05 18:26:18,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 981.8ms TimeCoverageRelationStatistics Valid=1428, Invalid=4272, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:26:18,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-05 18:26:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 5278. [2021-06-05 18:26:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:18,636 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:18,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:18,636 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:18,636 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) [2021-06-05 18:26:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:18,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:18,640 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:18,641 INFO L554 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] [2021-06-05 18:26:18,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-05 18:26:18,841 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:18,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:18,841 INFO L82 PathProgramCache]: Analyzing trace with hash -326592710, now seen corresponding path program 338 times [2021-06-05 18:26:18,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:18,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189518959] [2021-06-05 18:26:18,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:19,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:19,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189518959] [2021-06-05 18:26:19,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189518959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:19,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708290690] [2021-06-05 18:26:19,133 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 [2021-06-05 18:26:19,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:19,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:19,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:19,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708290690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:19,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:19,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:19,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032077655] [2021-06-05 18:26:19,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:19,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:19,406 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:20,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:20,622 INFO L93 Difference]: Finished difference Result 6671 states and 17797 transitions. [2021-06-05 18:26:20,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:26:20,623 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 [2021-06-05 18:26:20,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:20,630 INFO L225 Difference]: With dead ends: 6671 [2021-06-05 18:26:20,630 INFO L226 Difference]: Without dead ends: 6401 [2021-06-05 18:26:20,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 1183.0ms TimeCoverageRelationStatistics Valid=1571, Invalid=4749, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:26:20,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6401 states. [2021-06-05 18:26:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6401 to 5278. [2021-06-05 18:26:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:20,691 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:20,691 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:20,692 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) [2021-06-05 18:26:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:20,696 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:20,696 INFO L554 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] [2021-06-05 18:26:20,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:20,896 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -755657016, now seen corresponding path program 339 times [2021-06-05 18:26:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:20,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001565328] [2021-06-05 18:26:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:21,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001565328] [2021-06-05 18:26:21,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001565328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:21,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971243708] [2021-06-05 18:26:21,180 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 [2021-06-05 18:26:21,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:26:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:21,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:21,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:21,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971243708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:21,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:21,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221485425] [2021-06-05 18:26:21,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:21,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:21,475 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:22,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:22,489 INFO L93 Difference]: Finished difference Result 6621 states and 17697 transitions. [2021-06-05 18:26:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:26:22,489 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 [2021-06-05 18:26:22,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:22,496 INFO L225 Difference]: With dead ends: 6621 [2021-06-05 18:26:22,496 INFO L226 Difference]: Without dead ends: 6351 [2021-06-05 18:26:22,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 995.8ms TimeCoverageRelationStatistics Valid=1555, Invalid=4451, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:26:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6351 states. [2021-06-05 18:26:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6351 to 5278. [2021-06-05 18:26:22,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:22,555 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:22,555 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:22,555 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) [2021-06-05 18:26:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:22,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:22,559 INFO L554 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] [2021-06-05 18:26:22,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-05 18:26:22,760 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:22,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1441840200, now seen corresponding path program 340 times [2021-06-05 18:26:22,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:22,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993330958] [2021-06-05 18:26:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:23,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993330958] [2021-06-05 18:26:23,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993330958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:23,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806204620] [2021-06-05 18:26:23,048 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 [2021-06-05 18:26:23,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:23,314 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:23,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806204620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:23,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:23,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:23,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922572838] [2021-06-05 18:26:23,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:23,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:23,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:23,315 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:24,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:24,664 INFO L93 Difference]: Finished difference Result 6571 states and 17597 transitions. [2021-06-05 18:26:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:26:24,665 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 [2021-06-05 18:26:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:24,671 INFO L225 Difference]: With dead ends: 6571 [2021-06-05 18:26:24,671 INFO L226 Difference]: Without dead ends: 6301 [2021-06-05 18:26:24,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 1257.8ms TimeCoverageRelationStatistics Valid=1706, Invalid=4936, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:26:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6301 states. [2021-06-05 18:26:24,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6301 to 5278. [2021-06-05 18:26:24,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:24,729 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:24,729 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:24,729 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) [2021-06-05 18:26:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:24,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:24,733 INFO L554 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] [2021-06-05 18:26:24,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:24,934 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:24,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:24,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1526874938, now seen corresponding path program 341 times [2021-06-05 18:26:24,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:24,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316477861] [2021-06-05 18:26:24,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316477861] [2021-06-05 18:26:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316477861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033499913] [2021-06-05 18:26:25,218 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 [2021-06-05 18:26:25,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:25,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:25,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:25,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033499913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:25,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:25,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:25,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713847477] [2021-06-05 18:26:25,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:25,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:25,474 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:26,598 INFO L93 Difference]: Finished difference Result 6521 states and 17497 transitions. [2021-06-05 18:26:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:26:26,599 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 [2021-06-05 18:26:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:26,606 INFO L225 Difference]: With dead ends: 6521 [2021-06-05 18:26:26,606 INFO L226 Difference]: Without dead ends: 6251 [2021-06-05 18:26:26,607 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1035.8ms TimeCoverageRelationStatistics Valid=1698, Invalid=4622, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:26:26,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6251 states. [2021-06-05 18:26:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6251 to 5278. [2021-06-05 18:26:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:26,665 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:26,665 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:26,665 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) [2021-06-05 18:26:26,665 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:26,670 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:26,670 INFO L554 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] [2021-06-05 18:26:26,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2021-06-05 18:26:26,870 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1595025994, now seen corresponding path program 342 times [2021-06-05 18:26:26,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:26,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475415686] [2021-06-05 18:26:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:27,156 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:27,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:27,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475415686] [2021-06-05 18:26:27,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475415686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:27,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998279119] [2021-06-05 18:26:27,156 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 [2021-06-05 18:26:27,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:26:27,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:27,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:27,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:27,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998279119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:27,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294780113] [2021-06-05 18:26:27,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:27,469 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:28,820 INFO L93 Difference]: Finished difference Result 6471 states and 17397 transitions. [2021-06-05 18:26:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:26:28,821 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 [2021-06-05 18:26:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:28,828 INFO L225 Difference]: With dead ends: 6471 [2021-06-05 18:26:28,828 INFO L226 Difference]: Without dead ends: 6201 [2021-06-05 18:26:28,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1278.1ms TimeCoverageRelationStatistics Valid=1857, Invalid=5115, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:26:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6201 states. [2021-06-05 18:26:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6201 to 5278. [2021-06-05 18:26:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:28,887 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:28,887 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:28,887 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) [2021-06-05 18:26:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:28,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:28,891 INFO L554 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] [2021-06-05 18:26:29,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:29,092 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1402972228, now seen corresponding path program 343 times [2021-06-05 18:26:29,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:29,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626500036] [2021-06-05 18:26:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:29,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626500036] [2021-06-05 18:26:29,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626500036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:29,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353241738] [2021-06-05 18:26:29,372 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 [2021-06-05 18:26:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:29,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353241738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:29,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:29,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:29,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442747374] [2021-06-05 18:26:29,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:29,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:29,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:29,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:29,649 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 31 states, 31 states have (on average 5.161290322580645) internal successors, (160), 31 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:30,813 INFO L93 Difference]: Finished difference Result 6421 states and 17297 transitions. [2021-06-05 18:26:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:26:30,813 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 [2021-06-05 18:26:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:30,820 INFO L225 Difference]: With dead ends: 6421 [2021-06-05 18:26:30,820 INFO L226 Difference]: Without dead ends: 6151 [2021-06-05 18:26:30,820 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1084.1ms TimeCoverageRelationStatistics Valid=1857, Invalid=4785, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:26:30,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2021-06-05 18:26:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 5278. [2021-06-05 18:26:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.8203524729960203) internal successors, (14883), 5277 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14883 transitions. [2021-06-05 18:26:30,875 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14883 transitions. Word has length 160 [2021-06-05 18:26:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:30,875 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14883 transitions. [2021-06-05 18:26:30,875 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) [2021-06-05 18:26:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14883 transitions. [2021-06-05 18:26:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:30,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:30,880 INFO L554 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] [2021-06-05 18:26:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:31,080 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1832725812, now seen corresponding path program 344 times [2021-06-05 18:26:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850266623] [2021-06-05 18:26:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:31,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850266623] [2021-06-05 18:26:31,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850266623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:31,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897431808] [2021-06-05 18:26:31,366 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 [2021-06-05 18:26:31,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:31,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897431808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:31,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:31,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:31,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784107601] [2021-06-05 18:26:31,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:31,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:31,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:31,636 INFO L87 Difference]: Start difference. First operand 5278 states and 14883 transitions. Second operand has 32 states, 32 states have (on average 5.0625) internal successors, (162), 32 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:26:33,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:33,123 INFO L93 Difference]: Finished difference Result 6879 states and 18563 transitions. [2021-06-05 18:26:33,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:26:33,124 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 [2021-06-05 18:26:33,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:33,131 INFO L225 Difference]: With dead ends: 6879 [2021-06-05 18:26:33,131 INFO L226 Difference]: Without dead ends: 6256 [2021-06-05 18:26:33,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 1382.0ms TimeCoverageRelationStatistics Valid=2045, Invalid=5611, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:26:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2021-06-05 18:26:33,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 5188. [2021-06-05 18:26:33,190 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) [2021-06-05 18:26:33,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5188 states to 5188 states and 14648 transitions. [2021-06-05 18:26:33,235 INFO L78 Accepts]: Start accepts. Automaton has 5188 states and 14648 transitions. Word has length 160 [2021-06-05 18:26:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:33,235 INFO L482 AbstractCegarLoop]: Abstraction has 5188 states and 14648 transitions. [2021-06-05 18:26:33,235 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) [2021-06-05 18:26:33,235 INFO L276 IsEmpty]: Start isEmpty. Operand 5188 states and 14648 transitions. [2021-06-05 18:26:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:33,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:33,239 INFO L554 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] [2021-06-05 18:26:33,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:33,439 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:33,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:33,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1774991682, now seen corresponding path program 345 times [2021-06-05 18:26:33,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:33,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591290870] [2021-06-05 18:26:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:33,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591290870] [2021-06-05 18:26:33,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591290870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783524086] [2021-06-05 18:26:33,728 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 [2021-06-05 18:26:33,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:26:33,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:33,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:33,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783524086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:33,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:33,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-06-05 18:26:33,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265532193] [2021-06-05 18:26:33,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-05 18:26:33,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:33,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-05 18:26:33,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:26:33,989 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) [2021-06-05 18:26:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:35,152 INFO L93 Difference]: Finished difference Result 7108 states and 19281 transitions. [2021-06-05 18:26:35,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:26:35,152 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 [2021-06-05 18:26:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:35,160 INFO L225 Difference]: With dead ends: 7108 [2021-06-05 18:26:35,160 INFO L226 Difference]: Without dead ends: 6838 [2021-06-05 18:26:35,161 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1110.0ms TimeCoverageRelationStatistics Valid=2033, Invalid=4939, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:26:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6838 states. [2021-06-05 18:26:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6838 to 5368. [2021-06-05 18:26:35,216 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) [2021-06-05 18:26:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15207 transitions. [2021-06-05 18:26:35,224 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15207 transitions. Word has length 160 [2021-06-05 18:26:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15207 transitions. [2021-06-05 18:26:35,225 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) [2021-06-05 18:26:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15207 transitions. [2021-06-05 18:26:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-06-05 18:26:35,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:35,229 INFO L554 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] [2021-06-05 18:26:35,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 18:26:35,430 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1797334932, now seen corresponding path program 346 times [2021-06-05 18:26:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:35,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123538742] [2021-06-05 18:26:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:35,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:35,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123538742] [2021-06-05 18:26:35,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123538742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:35,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637167030] [2021-06-05 18:26:35,731 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 [2021-06-05 18:26:35,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:35,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:26:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:36,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637167030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:36,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:36,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-06-05 18:26:36,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439964763] [2021-06-05 18:26:36,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:36,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:36,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:36,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:36,000 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) [2021-06-05 18:26:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:37,467 INFO L93 Difference]: Finished difference Result 6595 states and 17981 transitions. [2021-06-05 18:26:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:26:37,467 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 [2021-06-05 18:26:37,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:37,474 INFO L225 Difference]: With dead ends: 6595 [2021-06-05 18:26:37,474 INFO L226 Difference]: Without dead ends: 6106 [2021-06-05 18:26:37,475 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1400.9ms TimeCoverageRelationStatistics Valid=2210, Invalid=5446, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:26:37,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6106 states. [2021-06-05 18:26:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6106 to 3513. [2021-06-05 18:26:37,518 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) [2021-06-05 18:26:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9628 transitions. [2021-06-05 18:26:37,522 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9628 transitions. Word has length 160 [2021-06-05 18:26:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:37,522 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9628 transitions. [2021-06-05 18:26:37,523 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) [2021-06-05 18:26:37,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9628 transitions. [2021-06-05 18:26:37,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:37,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:37,525 INFO L554 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] [2021-06-05 18:26:37,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 18:26:37,726 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:37,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1274170069, now seen corresponding path program 347 times [2021-06-05 18:26:37,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:37,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950418899] [2021-06-05 18:26:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:38,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950418899] [2021-06-05 18:26:38,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950418899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:38,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783870175] [2021-06-05 18:26:38,106 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 [2021-06-05 18:26:38,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:38,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:38,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:38,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:38,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783870175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:38,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:38,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:38,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306508107] [2021-06-05 18:26:38,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:38,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:38,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:38,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=773, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:38,389 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) [2021-06-05 18:26:39,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:39,091 INFO L93 Difference]: Finished difference Result 5231 states and 13267 transitions. [2021-06-05 18:26:39,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:26:39,092 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 [2021-06-05 18:26:39,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:39,096 INFO L225 Difference]: With dead ends: 5231 [2021-06-05 18:26:39,097 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 18:26:39,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 811.4ms TimeCoverageRelationStatistics Valid=1074, Invalid=2958, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:26:39,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 18:26:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3588. [2021-06-05 18:26:39,133 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) [2021-06-05 18:26:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3588 states to 3588 states and 9853 transitions. [2021-06-05 18:26:39,138 INFO L78 Accepts]: Start accepts. Automaton has 3588 states and 9853 transitions. Word has length 165 [2021-06-05 18:26:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:39,138 INFO L482 AbstractCegarLoop]: Abstraction has 3588 states and 9853 transitions. [2021-06-05 18:26:39,138 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) [2021-06-05 18:26:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3588 states and 9853 transitions. [2021-06-05 18:26:39,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:39,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:39,141 INFO L554 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] [2021-06-05 18:26:39,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2021-06-05 18:26:39,342 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:39,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2119657957, now seen corresponding path program 348 times [2021-06-05 18:26:39,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:39,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543107394] [2021-06-05 18:26:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:39,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:39,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543107394] [2021-06-05 18:26:39,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543107394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:39,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940336241] [2021-06-05 18:26:39,738 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 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 [2021-06-05 18:26:39,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:26:39,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:40,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940336241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:40,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:40,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:40,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132766836] [2021-06-05 18:26:40,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:40,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:40,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:40,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:40,044 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) [2021-06-05 18:26:40,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:40,739 INFO L93 Difference]: Finished difference Result 5901 states and 14682 transitions. [2021-06-05 18:26:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:26:40,739 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 [2021-06-05 18:26:40,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:40,744 INFO L225 Difference]: With dead ends: 5901 [2021-06-05 18:26:40,744 INFO L226 Difference]: Without dead ends: 5631 [2021-06-05 18:26:40,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 893.1ms TimeCoverageRelationStatistics Valid=1139, Invalid=3283, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:26:40,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5631 states. [2021-06-05 18:26:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5631 to 3663. [2021-06-05 18:26:40,783 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) [2021-06-05 18:26:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10078 transitions. [2021-06-05 18:26:40,788 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10078 transitions. Word has length 165 [2021-06-05 18:26:40,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:40,788 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10078 transitions. [2021-06-05 18:26:40,788 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) [2021-06-05 18:26:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10078 transitions. [2021-06-05 18:26:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:40,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:40,791 INFO L554 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] [2021-06-05 18:26:40,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable356,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:40,992 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash 269306281, now seen corresponding path program 349 times [2021-06-05 18:26:40,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:40,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326901273] [2021-06-05 18:26:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:41,340 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:41,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:41,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326901273] [2021-06-05 18:26:41,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326901273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:41,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34152786] [2021-06-05 18:26:41,340 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 [2021-06-05 18:26:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:41,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:41,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34152786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:41,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:41,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:41,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043872380] [2021-06-05 18:26:41,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:41,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=794, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:41,617 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) [2021-06-05 18:26:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:42,285 INFO L93 Difference]: Finished difference Result 5931 states and 14817 transitions. [2021-06-05 18:26:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:26:42,286 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 [2021-06-05 18:26:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:42,291 INFO L225 Difference]: With dead ends: 5931 [2021-06-05 18:26:42,291 INFO L226 Difference]: Without dead ends: 5661 [2021-06-05 18:26:42,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 822.2ms TimeCoverageRelationStatistics Valid=1131, Invalid=3291, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:26:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-05 18:26:42,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 3738. [2021-06-05 18:26:42,345 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) [2021-06-05 18:26:42,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10303 transitions. [2021-06-05 18:26:42,351 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10303 transitions. Word has length 165 [2021-06-05 18:26:42,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:42,351 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10303 transitions. [2021-06-05 18:26:42,351 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) [2021-06-05 18:26:42,351 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10303 transitions. [2021-06-05 18:26:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:42,354 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:42,354 INFO L554 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] [2021-06-05 18:26:42,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 18:26:42,555 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:42,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:42,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1152358041, now seen corresponding path program 350 times [2021-06-05 18:26:42,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:42,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113550873] [2021-06-05 18:26:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:42,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113550873] [2021-06-05 18:26:42,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113550873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:42,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624627414] [2021-06-05 18:26:42,917 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 [2021-06-05 18:26:42,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:42,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:42,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:42,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:43,210 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:43,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624627414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:43,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:43,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:43,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976826143] [2021-06-05 18:26:43,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:43,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:43,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:43,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:43,211 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) [2021-06-05 18:26:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:44,044 INFO L93 Difference]: Finished difference Result 5956 states and 14942 transitions. [2021-06-05 18:26:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:26:44,044 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 [2021-06-05 18:26:44,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:44,050 INFO L225 Difference]: With dead ends: 5956 [2021-06-05 18:26:44,050 INFO L226 Difference]: Without dead ends: 5686 [2021-06-05 18:26:44,051 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 918.9ms TimeCoverageRelationStatistics Valid=1153, Invalid=3539, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:44,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-05 18:26:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3813. [2021-06-05 18:26:44,091 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) [2021-06-05 18:26:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10528 transitions. [2021-06-05 18:26:44,096 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10528 transitions. Word has length 165 [2021-06-05 18:26:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:44,096 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10528 transitions. [2021-06-05 18:26:44,097 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) [2021-06-05 18:26:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10528 transitions. [2021-06-05 18:26:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:44,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:44,100 INFO L554 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] [2021-06-05 18:26:44,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:44,300 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:44,300 INFO L82 PathProgramCache]: Analyzing trace with hash -739851353, now seen corresponding path program 351 times [2021-06-05 18:26:44,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:44,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995006909] [2021-06-05 18:26:44,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:44,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:44,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995006909] [2021-06-05 18:26:44,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995006909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:44,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024585195] [2021-06-05 18:26:44,640 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 [2021-06-05 18:26:44,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:26:44,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:44,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024585195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:44,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:44,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:44,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128709750] [2021-06-05 18:26:44,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:44,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:44,927 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) [2021-06-05 18:26:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:45,700 INFO L93 Difference]: Finished difference Result 5981 states and 15067 transitions. [2021-06-05 18:26:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:26:45,701 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 [2021-06-05 18:26:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:45,706 INFO L225 Difference]: With dead ends: 5981 [2021-06-05 18:26:45,706 INFO L226 Difference]: Without dead ends: 5711 [2021-06-05 18:26:45,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 844.5ms TimeCoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:26:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-06-05 18:26:45,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 3888. [2021-06-05 18:26:45,747 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) [2021-06-05 18:26:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10753 transitions. [2021-06-05 18:26:45,752 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10753 transitions. Word has length 165 [2021-06-05 18:26:45,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:45,752 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10753 transitions. [2021-06-05 18:26:45,752 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) [2021-06-05 18:26:45,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10753 transitions. [2021-06-05 18:26:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:45,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:45,756 INFO L554 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] [2021-06-05 18:26:45,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 18:26:45,956 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1101495447, now seen corresponding path program 352 times [2021-06-05 18:26:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:45,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662383444] [2021-06-05 18:26:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:46,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:46,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662383444] [2021-06-05 18:26:46,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662383444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:46,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142636526] [2021-06-05 18:26:46,308 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 [2021-06-05 18:26:46,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:46,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142636526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:46,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:46,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:46,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356702293] [2021-06-05 18:26:46,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:46,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:46,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:46,604 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) [2021-06-05 18:26:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:47,490 INFO L93 Difference]: Finished difference Result 6006 states and 15192 transitions. [2021-06-05 18:26:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:26:47,491 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 [2021-06-05 18:26:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:47,497 INFO L225 Difference]: With dead ends: 6006 [2021-06-05 18:26:47,497 INFO L226 Difference]: Without dead ends: 5736 [2021-06-05 18:26:47,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 954.3ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:47,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5736 states. [2021-06-05 18:26:47,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5736 to 3963. [2021-06-05 18:26:47,542 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) [2021-06-05 18:26:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10978 transitions. [2021-06-05 18:26:47,548 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10978 transitions. Word has length 165 [2021-06-05 18:26:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:47,548 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10978 transitions. [2021-06-05 18:26:47,548 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) [2021-06-05 18:26:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10978 transitions. [2021-06-05 18:26:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:47,551 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:47,552 INFO L554 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] [2021-06-05 18:26:47,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:47,752 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1983054629, now seen corresponding path program 353 times [2021-06-05 18:26:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:47,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688154716] [2021-06-05 18:26:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:48,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688154716] [2021-06-05 18:26:48,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688154716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:48,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457045557] [2021-06-05 18:26:48,082 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 [2021-06-05 18:26:48,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:48,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:48,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457045557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:48,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:48,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:48,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691135074] [2021-06-05 18:26:48,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:48,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:48,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:48,382 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) [2021-06-05 18:26:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:49,188 INFO L93 Difference]: Finished difference Result 6031 states and 15317 transitions. [2021-06-05 18:26:49,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:26:49,189 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 [2021-06-05 18:26:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:49,195 INFO L225 Difference]: With dead ends: 6031 [2021-06-05 18:26:49,195 INFO L226 Difference]: Without dead ends: 5761 [2021-06-05 18:26:49,196 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=1203, Invalid=3767, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:26:49,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5761 states. [2021-06-05 18:26:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5761 to 4038. [2021-06-05 18:26:49,243 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) [2021-06-05 18:26:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11203 transitions. [2021-06-05 18:26:49,249 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11203 transitions. Word has length 165 [2021-06-05 18:26:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:49,249 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11203 transitions. [2021-06-05 18:26:49,249 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) [2021-06-05 18:26:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11203 transitions. [2021-06-05 18:26:49,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:49,253 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:49,253 INFO L554 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] [2021-06-05 18:26:49,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:49,453 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:49,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:49,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1340680213, now seen corresponding path program 354 times [2021-06-05 18:26:49,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:49,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511990730] [2021-06-05 18:26:49,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:49,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:49,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511990730] [2021-06-05 18:26:49,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511990730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:49,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122614594] [2021-06-05 18:26:49,796 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 [2021-06-05 18:26:49,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:26:49,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:49,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:49,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:50,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122614594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:50,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:50,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:50,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856793221] [2021-06-05 18:26:50,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:50,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:50,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:50,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:50,096 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) [2021-06-05 18:26:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:51,031 INFO L93 Difference]: Finished difference Result 6056 states and 15442 transitions. [2021-06-05 18:26:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:26:51,031 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 [2021-06-05 18:26:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:51,037 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 18:26:51,037 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 18:26:51,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=1229, Invalid=4027, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:26:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 18:26:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4113. [2021-06-05 18:26:51,082 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) [2021-06-05 18:26:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11428 transitions. [2021-06-05 18:26:51,087 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11428 transitions. Word has length 165 [2021-06-05 18:26:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:51,087 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11428 transitions. [2021-06-05 18:26:51,087 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) [2021-06-05 18:26:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11428 transitions. [2021-06-05 18:26:51,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:51,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:51,091 INFO L554 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] [2021-06-05 18:26:51,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:51,291 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:51,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1294133283, now seen corresponding path program 355 times [2021-06-05 18:26:51,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:51,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265478844] [2021-06-05 18:26:51,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:51,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265478844] [2021-06-05 18:26:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265478844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:51,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385408330] [2021-06-05 18:26:51,636 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 [2021-06-05 18:26:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:51,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:51,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385408330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:51,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:51,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359212151] [2021-06-05 18:26:51,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:51,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=833, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:51,905 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) [2021-06-05 18:26:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:52,737 INFO L93 Difference]: Finished difference Result 6081 states and 15567 transitions. [2021-06-05 18:26:52,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:26:52,737 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 [2021-06-05 18:26:52,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:52,743 INFO L225 Difference]: With dead ends: 6081 [2021-06-05 18:26:52,743 INFO L226 Difference]: Without dead ends: 5811 [2021-06-05 18:26:52,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=1263, Invalid=3993, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:26:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5811 states. [2021-06-05 18:26:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5811 to 4188. [2021-06-05 18:26:52,789 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) [2021-06-05 18:26:52,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11653 transitions. [2021-06-05 18:26:52,795 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11653 transitions. Word has length 165 [2021-06-05 18:26:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:52,795 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11653 transitions. [2021-06-05 18:26:52,795 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) [2021-06-05 18:26:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11653 transitions. [2021-06-05 18:26:52,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:52,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:52,798 INFO L554 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] [2021-06-05 18:26:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2021-06-05 18:26:52,999 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:52,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:52,999 INFO L82 PathProgramCache]: Analyzing trace with hash 375748883, now seen corresponding path program 356 times [2021-06-05 18:26:52,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:52,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736756319] [2021-06-05 18:26:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:53,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:53,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736756319] [2021-06-05 18:26:53,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736756319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:53,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007510892] [2021-06-05 18:26:53,332 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 [2021-06-05 18:26:53,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:26:53,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007510892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:53,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:53,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:53,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194749416] [2021-06-05 18:26:53,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:53,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:53,620 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) [2021-06-05 18:26:54,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:54,618 INFO L93 Difference]: Finished difference Result 6106 states and 15692 transitions. [2021-06-05 18:26:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:26:54,618 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 [2021-06-05 18:26:54,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:54,624 INFO L225 Difference]: With dead ends: 6106 [2021-06-05 18:26:54,624 INFO L226 Difference]: Without dead ends: 5836 [2021-06-05 18:26:54,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1050.7ms TimeCoverageRelationStatistics Valid=1291, Invalid=4259, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-05 18:26:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 4263. [2021-06-05 18:26:54,668 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) [2021-06-05 18:26:54,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11878 transitions. [2021-06-05 18:26:54,674 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11878 transitions. Word has length 165 [2021-06-05 18:26:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11878 transitions. [2021-06-05 18:26:54,674 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) [2021-06-05 18:26:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11878 transitions. [2021-06-05 18:26:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:54,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:54,678 INFO L554 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] [2021-06-05 18:26:54,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:26:54,878 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1400941919, now seen corresponding path program 357 times [2021-06-05 18:26:54,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:54,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86537355] [2021-06-05 18:26:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:55,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86537355] [2021-06-05 18:26:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86537355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877834675] [2021-06-05 18:26:55,197 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 [2021-06-05 18:26:55,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:26:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:55,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:55,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:55,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877834675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:55,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:55,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850530214] [2021-06-05 18:26:55,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:55,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:55,480 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) [2021-06-05 18:26:56,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:56,346 INFO L93 Difference]: Finished difference Result 6131 states and 15817 transitions. [2021-06-05 18:26:56,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:26:56,346 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 [2021-06-05 18:26:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:56,352 INFO L225 Difference]: With dead ends: 6131 [2021-06-05 18:26:56,352 INFO L226 Difference]: Without dead ends: 5861 [2021-06-05 18:26:56,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=1339, Invalid=4211, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:26:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-05 18:26:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 4338. [2021-06-05 18:26:56,403 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) [2021-06-05 18:26:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12103 transitions. [2021-06-05 18:26:56,409 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12103 transitions. Word has length 165 [2021-06-05 18:26:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:56,409 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12103 transitions. [2021-06-05 18:26:56,409 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) [2021-06-05 18:26:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12103 transitions. [2021-06-05 18:26:56,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:56,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:56,413 INFO L554 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] [2021-06-05 18:26:56,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-05 18:26:56,614 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash 698699665, now seen corresponding path program 358 times [2021-06-05 18:26:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:56,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548300839] [2021-06-05 18:26:56,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:56,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:56,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548300839] [2021-06-05 18:26:56,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548300839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:56,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443855073] [2021-06-05 18:26:56,938 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 [2021-06-05 18:26:57,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:26:57,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:57,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443855073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:57,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:57,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:26:57,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172247626] [2021-06-05 18:26:57,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:26:57,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:57,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:26:57,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:26:57,249 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) [2021-06-05 18:26:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:26:58,262 INFO L93 Difference]: Finished difference Result 6156 states and 15942 transitions. [2021-06-05 18:26:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:26:58,263 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 [2021-06-05 18:26:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:26:58,269 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 18:26:58,269 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 18:26:58,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1073.1ms TimeCoverageRelationStatistics Valid=1369, Invalid=4483, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:26:58,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 18:26:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 4413. [2021-06-05 18:26:58,318 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) [2021-06-05 18:26:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12328 transitions. [2021-06-05 18:26:58,324 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12328 transitions. Word has length 165 [2021-06-05 18:26:58,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:26:58,324 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12328 transitions. [2021-06-05 18:26:58,324 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) [2021-06-05 18:26:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12328 transitions. [2021-06-05 18:26:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:26:58,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:26:58,328 INFO L554 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] [2021-06-05 18:26:58,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 18:26:58,528 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:26:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:26:58,529 INFO L82 PathProgramCache]: Analyzing trace with hash -2086067553, now seen corresponding path program 359 times [2021-06-05 18:26:58,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:26:58,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732220813] [2021-06-05 18:26:58,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:26:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:26:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:58,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:26:58,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732220813] [2021-06-05 18:26:58,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732220813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:58,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411532219] [2021-06-05 18:26:58,840 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 [2021-06-05 18:26:58,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:26:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:26:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:26:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:26:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:26:59,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411532219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:26:59,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:26:59,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:26:59,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599424493] [2021-06-05 18:26:59,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:26:59,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:26:59,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:26:59,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:26:59,111 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) [2021-06-05 18:27:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:00,026 INFO L93 Difference]: Finished difference Result 6181 states and 16067 transitions. [2021-06-05 18:27:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:27:00,026 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 [2021-06-05 18:27:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:00,032 INFO L225 Difference]: With dead ends: 6181 [2021-06-05 18:27:00,033 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 18:27:00,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 961.5ms TimeCoverageRelationStatistics Valid=1431, Invalid=4421, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:27:00,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 18:27:00,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4488. [2021-06-05 18:27:00,110 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) [2021-06-05 18:27:00,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12553 transitions. [2021-06-05 18:27:00,116 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12553 transitions. Word has length 165 [2021-06-05 18:27:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:00,116 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12553 transitions. [2021-06-05 18:27:00,116 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) [2021-06-05 18:27:00,116 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12553 transitions. [2021-06-05 18:27:00,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:00,119 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:00,120 INFO L554 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] [2021-06-05 18:27:00,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2021-06-05 18:27:00,328 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:00,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:00,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1446409329, now seen corresponding path program 360 times [2021-06-05 18:27:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:00,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441892327] [2021-06-05 18:27:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:00,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:00,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441892327] [2021-06-05 18:27:00,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441892327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:00,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627358880] [2021-06-05 18:27:00,642 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 [2021-06-05 18:27:00,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:00,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:00,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:00,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627358880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:00,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:00,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:00,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779273560] [2021-06-05 18:27:00,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:00,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:00,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:00,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:00,939 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) [2021-06-05 18:27:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:02,025 INFO L93 Difference]: Finished difference Result 6206 states and 16192 transitions. [2021-06-05 18:27:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:27:02,026 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 [2021-06-05 18:27:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:02,031 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 18:27:02,032 INFO L226 Difference]: Without dead ends: 5936 [2021-06-05 18:27:02,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1117.8ms TimeCoverageRelationStatistics Valid=1463, Invalid=4699, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:27:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-05 18:27:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4563. [2021-06-05 18:27:02,081 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) [2021-06-05 18:27:02,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12778 transitions. [2021-06-05 18:27:02,088 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12778 transitions. Word has length 165 [2021-06-05 18:27:02,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:02,088 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12778 transitions. [2021-06-05 18:27:02,088 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) [2021-06-05 18:27:02,088 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12778 transitions. [2021-06-05 18:27:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:02,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:02,092 INFO L554 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] [2021-06-05 18:27:02,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2021-06-05 18:27:02,292 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:02,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:02,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2073638941, now seen corresponding path program 361 times [2021-06-05 18:27:02,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:02,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884033013] [2021-06-05 18:27:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:02,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884033013] [2021-06-05 18:27:02,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884033013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400738820] [2021-06-05 18:27:02,611 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 [2021-06-05 18:27:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:02,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:02,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:02,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400738820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:02,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:02,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:02,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334126131] [2021-06-05 18:27:02,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:02,874 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) [2021-06-05 18:27:03,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:03,860 INFO L93 Difference]: Finished difference Result 6231 states and 16317 transitions. [2021-06-05 18:27:03,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:27:03,860 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 [2021-06-05 18:27:03,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:03,866 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 18:27:03,866 INFO L226 Difference]: Without dead ends: 5961 [2021-06-05 18:27:03,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=1539, Invalid=4623, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:27:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-05 18:27:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4638. [2021-06-05 18:27:03,917 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) [2021-06-05 18:27:03,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 13003 transitions. [2021-06-05 18:27:03,924 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 13003 transitions. Word has length 165 [2021-06-05 18:27:03,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:03,924 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 13003 transitions. [2021-06-05 18:27:03,924 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) [2021-06-05 18:27:03,924 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 13003 transitions. [2021-06-05 18:27:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:03,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:03,928 INFO L554 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] [2021-06-05 18:27:04,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:04,128 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1619725581, now seen corresponding path program 362 times [2021-06-05 18:27:04,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:04,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232254128] [2021-06-05 18:27:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:04,437 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:04,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:04,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232254128] [2021-06-05 18:27:04,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232254128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:04,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781454907] [2021-06-05 18:27:04,437 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 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 [2021-06-05 18:27:04,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:04,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:04,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:04,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:04,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781454907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:04,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:04,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:04,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056514812] [2021-06-05 18:27:04,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:04,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:04,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:04,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:04,721 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) [2021-06-05 18:27:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:05,865 INFO L93 Difference]: Finished difference Result 6256 states and 16442 transitions. [2021-06-05 18:27:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:27:05,866 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 [2021-06-05 18:27:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:05,872 INFO L225 Difference]: With dead ends: 6256 [2021-06-05 18:27:05,872 INFO L226 Difference]: Without dead ends: 5986 [2021-06-05 18:27:05,872 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1635 ImplicationChecksByTransitivity, 1168.6ms TimeCoverageRelationStatistics Valid=1573, Invalid=4907, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:27:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-05 18:27:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4713. [2021-06-05 18:27:05,923 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) [2021-06-05 18:27:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13228 transitions. [2021-06-05 18:27:05,930 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13228 transitions. Word has length 165 [2021-06-05 18:27:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:05,930 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13228 transitions. [2021-06-05 18:27:05,931 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) [2021-06-05 18:27:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13228 transitions. [2021-06-05 18:27:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:05,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:05,934 INFO L554 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] [2021-06-05 18:27:06,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 18:27:06,135 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:06,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1797229797, now seen corresponding path program 363 times [2021-06-05 18:27:06,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:06,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947573326] [2021-06-05 18:27:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:06,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947573326] [2021-06-05 18:27:06,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947573326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:06,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51486103] [2021-06-05 18:27:06,465 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 [2021-06-05 18:27:06,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:06,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:06,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:06,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51486103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:06,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:06,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:06,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768772120] [2021-06-05 18:27:06,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:06,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:06,740 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) [2021-06-05 18:27:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:07,741 INFO L93 Difference]: Finished difference Result 6281 states and 16567 transitions. [2021-06-05 18:27:07,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:27:07,742 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 [2021-06-05 18:27:07,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:07,748 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 18:27:07,748 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 18:27:07,749 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1723 ImplicationChecksByTransitivity, 1046.9ms TimeCoverageRelationStatistics Valid=1663, Invalid=4817, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:27:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 18:27:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4788. [2021-06-05 18:27:07,803 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) [2021-06-05 18:27:07,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13453 transitions. [2021-06-05 18:27:07,809 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13453 transitions. Word has length 165 [2021-06-05 18:27:07,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:07,810 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13453 transitions. [2021-06-05 18:27:07,810 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) [2021-06-05 18:27:07,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13453 transitions. [2021-06-05 18:27:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:07,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:07,814 INFO L554 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] [2021-06-05 18:27:08,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:08,014 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:08,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1597682699, now seen corresponding path program 364 times [2021-06-05 18:27:08,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:08,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418844991] [2021-06-05 18:27:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:08,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:08,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418844991] [2021-06-05 18:27:08,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418844991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:08,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414404196] [2021-06-05 18:27:08,318 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 [2021-06-05 18:27:08,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:08,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:08,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:08,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414404196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:08,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:08,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:08,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262089639] [2021-06-05 18:27:08,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:08,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:08,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:08,596 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) [2021-06-05 18:27:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:09,835 INFO L93 Difference]: Finished difference Result 6306 states and 16692 transitions. [2021-06-05 18:27:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:27:09,835 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 [2021-06-05 18:27:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:09,841 INFO L225 Difference]: With dead ends: 6306 [2021-06-05 18:27:09,841 INFO L226 Difference]: Without dead ends: 6036 [2021-06-05 18:27:09,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1227.8ms TimeCoverageRelationStatistics Valid=1699, Invalid=5107, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:27:09,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-05 18:27:09,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4863. [2021-06-05 18:27:09,892 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) [2021-06-05 18:27:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13678 transitions. [2021-06-05 18:27:09,899 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13678 transitions. Word has length 165 [2021-06-05 18:27:09,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:09,899 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13678 transitions. [2021-06-05 18:27:09,899 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) [2021-06-05 18:27:09,899 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13678 transitions. [2021-06-05 18:27:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:09,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:09,903 INFO L554 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] [2021-06-05 18:27:10,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:10,104 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1168618393, now seen corresponding path program 365 times [2021-06-05 18:27:10,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:10,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214290663] [2021-06-05 18:27:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:10,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214290663] [2021-06-05 18:27:10,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214290663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:10,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803190515] [2021-06-05 18:27:10,407 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 [2021-06-05 18:27:10,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:10,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:10,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:10,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803190515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:10,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:10,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:10,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097690206] [2021-06-05 18:27:10,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:10,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:10,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=818, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:10,673 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) [2021-06-05 18:27:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:11,728 INFO L93 Difference]: Finished difference Result 6331 states and 16817 transitions. [2021-06-05 18:27:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:27:11,728 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 [2021-06-05 18:27:11,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:11,734 INFO L225 Difference]: With dead ends: 6331 [2021-06-05 18:27:11,735 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 18:27:11,735 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1854 ImplicationChecksByTransitivity, 1058.6ms TimeCoverageRelationStatistics Valid=1803, Invalid=5003, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:27:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 18:27:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4938. [2021-06-05 18:27:11,794 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) [2021-06-05 18:27:11,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13903 transitions. [2021-06-05 18:27:11,801 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13903 transitions. Word has length 165 [2021-06-05 18:27:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:11,801 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13903 transitions. [2021-06-05 18:27:11,801 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) [2021-06-05 18:27:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13903 transitions. [2021-06-05 18:27:11,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:11,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:11,805 INFO L554 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] [2021-06-05 18:27:12,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:12,006 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:12,006 INFO L82 PathProgramCache]: Analyzing trace with hash 482435209, now seen corresponding path program 366 times [2021-06-05 18:27:12,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:12,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990623503] [2021-06-05 18:27:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:12,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990623503] [2021-06-05 18:27:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990623503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:12,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787516478] [2021-06-05 18:27:12,335 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 [2021-06-05 18:27:12,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:12,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787516478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:12,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:12,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:12,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159273009] [2021-06-05 18:27:12,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:12,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:12,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:12,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:12,625 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) [2021-06-05 18:27:13,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:13,896 INFO L93 Difference]: Finished difference Result 6356 states and 16942 transitions. [2021-06-05 18:27:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:27:13,896 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 [2021-06-05 18:27:13,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:13,902 INFO L225 Difference]: With dead ends: 6356 [2021-06-05 18:27:13,902 INFO L226 Difference]: Without dead ends: 6086 [2021-06-05 18:27:13,903 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1899 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=1841, Invalid=5299, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:27:13,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-05 18:27:13,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 5013. [2021-06-05 18:27:13,957 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) [2021-06-05 18:27:13,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14128 transitions. [2021-06-05 18:27:13,964 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14128 transitions. Word has length 165 [2021-06-05 18:27:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:13,964 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14128 transitions. [2021-06-05 18:27:13,964 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) [2021-06-05 18:27:13,965 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14128 transitions. [2021-06-05 18:27:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:13,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:13,969 INFO L554 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] [2021-06-05 18:27:14,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:14,169 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 397400471, now seen corresponding path program 367 times [2021-06-05 18:27:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:14,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144132389] [2021-06-05 18:27:14,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:14,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:14,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144132389] [2021-06-05 18:27:14,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144132389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:14,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358795536] [2021-06-05 18:27:14,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:14,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:14,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358795536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:14,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:14,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:14,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983506936] [2021-06-05 18:27:14,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:14,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:14,726 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) [2021-06-05 18:27:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:15,844 INFO L93 Difference]: Finished difference Result 6381 states and 17067 transitions. [2021-06-05 18:27:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:27:15,844 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 [2021-06-05 18:27:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:15,850 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 18:27:15,850 INFO L226 Difference]: Without dead ends: 6111 [2021-06-05 18:27:15,851 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 1112.6ms TimeCoverageRelationStatistics Valid=1959, Invalid=5181, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:27:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-05 18:27:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 5088. [2021-06-05 18:27:15,908 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) [2021-06-05 18:27:15,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14353 transitions. [2021-06-05 18:27:15,915 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14353 transitions. Word has length 165 [2021-06-05 18:27:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:15,916 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14353 transitions. [2021-06-05 18:27:15,916 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) [2021-06-05 18:27:15,916 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14353 transitions. [2021-06-05 18:27:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:15,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:15,920 INFO L554 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] [2021-06-05 18:27:16,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 18:27:16,121 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 329249415, now seen corresponding path program 368 times [2021-06-05 18:27:16,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:16,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920224232] [2021-06-05 18:27:16,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:16,422 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:16,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920224232] [2021-06-05 18:27:16,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920224232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:16,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679392530] [2021-06-05 18:27:16,422 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 [2021-06-05 18:27:16,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:16,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679392530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:16,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:16,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685274535] [2021-06-05 18:27:16,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:16,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:16,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:16,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:16,698 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) [2021-06-05 18:27:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:18,032 INFO L93 Difference]: Finished difference Result 6406 states and 17192 transitions. [2021-06-05 18:27:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:27:18,033 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 [2021-06-05 18:27:18,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:18,039 INFO L225 Difference]: With dead ends: 6406 [2021-06-05 18:27:18,040 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 18:27:18,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1316.3ms TimeCoverageRelationStatistics Valid=1999, Invalid=5483, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:27:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 18:27:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 5163. [2021-06-05 18:27:18,120 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) [2021-06-05 18:27:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14578 transitions. [2021-06-05 18:27:18,128 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14578 transitions. Word has length 165 [2021-06-05 18:27:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:18,128 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14578 transitions. [2021-06-05 18:27:18,128 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) [2021-06-05 18:27:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14578 transitions. [2021-06-05 18:27:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:18,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:18,132 INFO L554 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] [2021-06-05 18:27:18,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 18:27:18,333 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:18,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:18,333 INFO L82 PathProgramCache]: Analyzing trace with hash -967719659, now seen corresponding path program 369 times [2021-06-05 18:27:18,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:18,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657931087] [2021-06-05 18:27:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:18,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657931087] [2021-06-05 18:27:18,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657931087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:18,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654066917] [2021-06-05 18:27:18,641 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 [2021-06-05 18:27:18,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-05 18:27:18,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:18,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:18,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:18,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654066917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:18,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:18,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:18,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270678164] [2021-06-05 18:27:18,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:18,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:18,914 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) [2021-06-05 18:27:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:20,049 INFO L93 Difference]: Finished difference Result 6431 states and 17317 transitions. [2021-06-05 18:27:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:27:20,049 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 [2021-06-05 18:27:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:20,056 INFO L225 Difference]: With dead ends: 6431 [2021-06-05 18:27:20,056 INFO L226 Difference]: Without dead ends: 6161 [2021-06-05 18:27:20,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1124.6ms TimeCoverageRelationStatistics Valid=2131, Invalid=5351, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:27:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-05 18:27:20,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 5238. [2021-06-05 18:27:20,115 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) [2021-06-05 18:27:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14803 transitions. [2021-06-05 18:27:20,122 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14803 transitions. Word has length 165 [2021-06-05 18:27:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:20,123 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14803 transitions. [2021-06-05 18:27:20,123 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) [2021-06-05 18:27:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14803 transitions. [2021-06-05 18:27:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:20,127 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:20,127 INFO L554 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] [2021-06-05 18:27:20,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-05 18:27:20,327 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:20,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:20,328 INFO L82 PathProgramCache]: Analyzing trace with hash -537966075, now seen corresponding path program 370 times [2021-06-05 18:27:20,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:20,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324449772] [2021-06-05 18:27:20,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:20,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324449772] [2021-06-05 18:27:20,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324449772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:20,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354490138] [2021-06-05 18:27:20,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:20,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:20,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:20,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:20,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354490138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:20,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:20,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:20,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498373607] [2021-06-05 18:27:20,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:20,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:20,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:20,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:20,907 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) [2021-06-05 18:27:22,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:22,311 INFO L93 Difference]: Finished difference Result 6516 states and 17607 transitions. [2021-06-05 18:27:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:27:22,312 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 [2021-06-05 18:27:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:22,318 INFO L225 Difference]: With dead ends: 6516 [2021-06-05 18:27:22,318 INFO L226 Difference]: Without dead ends: 6246 [2021-06-05 18:27:22,319 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2179 ImplicationChecksByTransitivity, 1383.8ms TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:27:22,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6246 states. [2021-06-05 18:27:22,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6246 to 5313. [2021-06-05 18:27:22,378 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) [2021-06-05 18:27:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 15048 transitions. [2021-06-05 18:27:22,386 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 15048 transitions. Word has length 165 [2021-06-05 18:27:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:22,386 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 15048 transitions. [2021-06-05 18:27:22,386 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) [2021-06-05 18:27:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 15048 transitions. [2021-06-05 18:27:22,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:22,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:22,391 INFO L554 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] [2021-06-05 18:27:22,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 18:27:22,591 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:22,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:22,591 INFO L82 PathProgramCache]: Analyzing trace with hash -595700205, now seen corresponding path program 371 times [2021-06-05 18:27:22,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:22,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569842360] [2021-06-05 18:27:22,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:22,892 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:22,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569842360] [2021-06-05 18:27:22,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569842360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:22,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852037076] [2021-06-05 18:27:22,893 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 [2021-06-05 18:27:22,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-05 18:27:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:22,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:22,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:23,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852037076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:23,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:23,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-06-05 18:27:23,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125865609] [2021-06-05 18:27:23,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-05 18:27:23,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:23,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-05 18:27:23,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:27:23,156 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) [2021-06-05 18:27:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:24,354 INFO L93 Difference]: Finished difference Result 7258 states and 19731 transitions. [2021-06-05 18:27:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:27:24,355 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 [2021-06-05 18:27:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:24,361 INFO L225 Difference]: With dead ends: 7258 [2021-06-05 18:27:24,361 INFO L226 Difference]: Without dead ends: 6988 [2021-06-05 18:27:24,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 1182.7ms TimeCoverageRelationStatistics Valid=2320, Invalid=5512, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:27:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6988 states. [2021-06-05 18:27:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6988 to 5493. [2021-06-05 18:27:24,419 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) [2021-06-05 18:27:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5493 states to 5493 states and 15607 transitions. [2021-06-05 18:27:24,428 INFO L78 Accepts]: Start accepts. Automaton has 5493 states and 15607 transitions. Word has length 165 [2021-06-05 18:27:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:24,428 INFO L482 AbstractCegarLoop]: Abstraction has 5493 states and 15607 transitions. [2021-06-05 18:27:24,428 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) [2021-06-05 18:27:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5493 states and 15607 transitions. [2021-06-05 18:27:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-06-05 18:27:24,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:24,433 INFO L554 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] [2021-06-05 18:27:24,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:24,633 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:24,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash -573356955, now seen corresponding path program 372 times [2021-06-05 18:27:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:24,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773630105] [2021-06-05 18:27:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:24,937 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:24,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773630105] [2021-06-05 18:27:24,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773630105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:24,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236221378] [2021-06-05 18:27:24,938 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 [2021-06-05 18:27:25,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-05 18:27:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:27:25,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:25,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236221378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:25,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:25,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-06-05 18:27:25,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464091530] [2021-06-05 18:27:25,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:25,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:25,227 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) [2021-06-05 18:27:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:26,643 INFO L93 Difference]: Finished difference Result 6720 states and 18381 transitions. [2021-06-05 18:27:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:27:26,643 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 [2021-06-05 18:27:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:26,651 INFO L225 Difference]: With dead ends: 6720 [2021-06-05 18:27:26,651 INFO L226 Difference]: Without dead ends: 6231 [2021-06-05 18:27:26,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 1389.9ms TimeCoverageRelationStatistics Valid=2366, Invalid=5824, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:27:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6231 states. [2021-06-05 18:27:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6231 to 3434. [2021-06-05 18:27:26,694 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) [2021-06-05 18:27:26,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 9416 transitions. [2021-06-05 18:27:26,698 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 9416 transitions. Word has length 165 [2021-06-05 18:27:26,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:26,699 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 9416 transitions. [2021-06-05 18:27:26,699 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) [2021-06-05 18:27:26,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 9416 transitions. [2021-06-05 18:27:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:26,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:26,702 INFO L554 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] [2021-06-05 18:27:26,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-05 18:27:26,902 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:26,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:26,902 INFO L82 PathProgramCache]: Analyzing trace with hash -471160217, now seen corresponding path program 373 times [2021-06-05 18:27:26,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:26,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761441775] [2021-06-05 18:27:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:27,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761441775] [2021-06-05 18:27:27,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761441775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36156310] [2021-06-05 18:27:27,306 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 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 [2021-06-05 18:27:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:27,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:27:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:27,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36156310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:27,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:27,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:27:27,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20891809] [2021-06-05 18:27:27,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:27:27,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:27,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:27:27,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=976, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:27:27,627 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) [2021-06-05 18:27:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:28,409 INFO L93 Difference]: Finished difference Result 4774 states and 12416 transitions. [2021-06-05 18:27:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:27:28,410 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 [2021-06-05 18:27:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:28,415 INFO L225 Difference]: With dead ends: 4774 [2021-06-05 18:27:28,415 INFO L226 Difference]: Without dead ends: 4440 [2021-06-05 18:27:28,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=1320, Invalid=3510, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:27:28,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-05 18:27:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3519. [2021-06-05 18:27:28,449 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) [2021-06-05 18:27:28,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 9586 transitions. [2021-06-05 18:27:28,453 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 9586 transitions. Word has length 170 [2021-06-05 18:27:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:28,454 INFO L482 AbstractCegarLoop]: Abstraction has 3519 states and 9586 transitions. [2021-06-05 18:27:28,454 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) [2021-06-05 18:27:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 9586 transitions. [2021-06-05 18:27:28,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:28,456 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:28,457 INFO L554 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] [2021-06-05 18:27:28,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:28,658 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:28,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1251320075, now seen corresponding path program 374 times [2021-06-05 18:27:28,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:28,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524991600] [2021-06-05 18:27:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:29,045 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:29,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:29,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524991600] [2021-06-05 18:27:29,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524991600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:29,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348443304] [2021-06-05 18:27:29,046 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 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 [2021-06-05 18:27:29,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:29,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:29,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:29,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348443304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:29,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:29,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:29,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811971422] [2021-06-05 18:27:29,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:29,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:29,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:29,328 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) [2021-06-05 18:27:29,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:29,969 INFO L93 Difference]: Finished difference Result 6096 states and 14997 transitions. [2021-06-05 18:27:29,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:27:29,969 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 [2021-06-05 18:27:29,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:29,976 INFO L225 Difference]: With dead ends: 6096 [2021-06-05 18:27:29,976 INFO L226 Difference]: Without dead ends: 5826 [2021-06-05 18:27:29,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 813.3ms TimeCoverageRelationStatistics Valid=1132, Invalid=2900, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:27:29,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5826 states. [2021-06-05 18:27:30,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5826 to 3663. [2021-06-05 18:27:30,018 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) [2021-06-05 18:27:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3663 states to 3663 states and 10003 transitions. [2021-06-05 18:27:30,023 INFO L78 Accepts]: Start accepts. Automaton has 3663 states and 10003 transitions. Word has length 170 [2021-06-05 18:27:30,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:30,023 INFO L482 AbstractCegarLoop]: Abstraction has 3663 states and 10003 transitions. [2021-06-05 18:27:30,023 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) [2021-06-05 18:27:30,023 INFO L276 IsEmpty]: Start isEmpty. Operand 3663 states and 10003 transitions. [2021-06-05 18:27:30,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:30,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:30,047 INFO L554 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] [2021-06-05 18:27:30,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:30,247 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:30,248 INFO L82 PathProgramCache]: Analyzing trace with hash 310384123, now seen corresponding path program 375 times [2021-06-05 18:27:30,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:30,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079223626] [2021-06-05 18:27:30,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:30,651 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:30,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079223626] [2021-06-05 18:27:30,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079223626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:30,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343853100] [2021-06-05 18:27:30,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:30,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:27:30,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:30,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:30,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343853100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:30,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:30,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:30,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028549636] [2021-06-05 18:27:30,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:30,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:30,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:30,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:30,963 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) [2021-06-05 18:27:31,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:31,673 INFO L93 Difference]: Finished difference Result 6056 states and 14992 transitions. [2021-06-05 18:27:31,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:27:31,673 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 [2021-06-05 18:27:31,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:31,679 INFO L225 Difference]: With dead ends: 6056 [2021-06-05 18:27:31,679 INFO L226 Difference]: Without dead ends: 5786 [2021-06-05 18:27:31,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 905.2ms TimeCoverageRelationStatistics Valid=1215, Invalid=3341, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:27:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2021-06-05 18:27:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 3738. [2021-06-05 18:27:31,723 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) [2021-06-05 18:27:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3738 states to 3738 states and 10228 transitions. [2021-06-05 18:27:31,728 INFO L78 Accepts]: Start accepts. Automaton has 3738 states and 10228 transitions. Word has length 170 [2021-06-05 18:27:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:31,728 INFO L482 AbstractCegarLoop]: Abstraction has 3738 states and 10228 transitions. [2021-06-05 18:27:31,728 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) [2021-06-05 18:27:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3738 states and 10228 transitions. [2021-06-05 18:27:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:31,731 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:31,731 INFO L554 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] [2021-06-05 18:27:31,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:31,932 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1941712905, now seen corresponding path program 376 times [2021-06-05 18:27:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:31,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369045536] [2021-06-05 18:27:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:32,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369045536] [2021-06-05 18:27:32,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369045536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:32,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486827579] [2021-06-05 18:27:32,323 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 [2021-06-05 18:27:32,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:32,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:32,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:32,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486827579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:32,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:32,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:32,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388772324] [2021-06-05 18:27:32,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:32,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:32,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:32,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:32,601 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) [2021-06-05 18:27:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:33,285 INFO L93 Difference]: Finished difference Result 6106 states and 15167 transitions. [2021-06-05 18:27:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:27:33,285 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 [2021-06-05 18:27:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:33,290 INFO L225 Difference]: With dead ends: 6106 [2021-06-05 18:27:33,290 INFO L226 Difference]: Without dead ends: 5836 [2021-06-05 18:27:33,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 852.3ms TimeCoverageRelationStatistics Valid=1129, Invalid=3161, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:27:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5836 states. [2021-06-05 18:27:33,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5836 to 3813. [2021-06-05 18:27:33,327 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) [2021-06-05 18:27:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10453 transitions. [2021-06-05 18:27:33,332 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10453 transitions. Word has length 170 [2021-06-05 18:27:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:33,332 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10453 transitions. [2021-06-05 18:27:33,332 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) [2021-06-05 18:27:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10453 transitions. [2021-06-05 18:27:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:33,335 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:33,335 INFO L554 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] [2021-06-05 18:27:33,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:33,536 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:33,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1096225017, now seen corresponding path program 377 times [2021-06-05 18:27:33,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:33,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724207670] [2021-06-05 18:27:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:33,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:33,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724207670] [2021-06-05 18:27:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724207670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:33,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859000738] [2021-06-05 18:27:33,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:34,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:27:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:34,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:34,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:34,242 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:34,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859000738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:34,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:34,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:34,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091882531] [2021-06-05 18:27:34,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:34,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:34,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:34,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:34,243 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) [2021-06-05 18:27:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:35,017 INFO L93 Difference]: Finished difference Result 6131 states and 15292 transitions. [2021-06-05 18:27:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:27:35,017 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 [2021-06-05 18:27:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:35,024 INFO L225 Difference]: With dead ends: 6131 [2021-06-05 18:27:35,024 INFO L226 Difference]: Without dead ends: 5861 [2021-06-05 18:27:35,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 955.3ms TimeCoverageRelationStatistics Valid=1220, Invalid=3610, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:27:35,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5861 states. [2021-06-05 18:27:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5861 to 3888. [2021-06-05 18:27:35,066 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) [2021-06-05 18:27:35,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3888 states to 3888 states and 10678 transitions. [2021-06-05 18:27:35,072 INFO L78 Accepts]: Start accepts. Automaton has 3888 states and 10678 transitions. Word has length 170 [2021-06-05 18:27:35,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:35,072 INFO L482 AbstractCegarLoop]: Abstraction has 3888 states and 10678 transitions. [2021-06-05 18:27:35,072 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) [2021-06-05 18:27:35,072 INFO L276 IsEmpty]: Start isEmpty. Operand 3888 states and 10678 transitions. [2021-06-05 18:27:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:35,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:35,075 INFO L554 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] [2021-06-05 18:27:35,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:35,275 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:35,276 INFO L82 PathProgramCache]: Analyzing trace with hash -809778041, now seen corresponding path program 378 times [2021-06-05 18:27:35,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:35,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116781903] [2021-06-05 18:27:35,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:35,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:35,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116781903] [2021-06-05 18:27:35,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116781903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:35,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642866596] [2021-06-05 18:27:35,641 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 [2021-06-05 18:27:35,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:27:35,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:35,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642866596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:35,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:35,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:35,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744690869] [2021-06-05 18:27:35,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:35,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:35,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:35,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:35,931 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) [2021-06-05 18:27:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:36,699 INFO L93 Difference]: Finished difference Result 6156 states and 15417 transitions. [2021-06-05 18:27:36,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:27:36,699 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 [2021-06-05 18:27:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:36,705 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 18:27:36,705 INFO L226 Difference]: Without dead ends: 5886 [2021-06-05 18:27:36,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 889.6ms TimeCoverageRelationStatistics Valid=1142, Invalid=3414, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:27:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5886 states. [2021-06-05 18:27:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5886 to 3963. [2021-06-05 18:27:36,752 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) [2021-06-05 18:27:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3963 states to 3963 states and 10903 transitions. [2021-06-05 18:27:36,757 INFO L78 Accepts]: Start accepts. Automaton has 3963 states and 10903 transitions. Word has length 170 [2021-06-05 18:27:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:36,757 INFO L482 AbstractCegarLoop]: Abstraction has 3963 states and 10903 transitions. [2021-06-05 18:27:36,757 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) [2021-06-05 18:27:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3963 states and 10903 transitions. [2021-06-05 18:27:36,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:36,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:36,761 INFO L554 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] [2021-06-05 18:27:36,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-05 18:27:36,961 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash 73273719, now seen corresponding path program 379 times [2021-06-05 18:27:36,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:36,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656643565] [2021-06-05 18:27:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:37,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:37,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656643565] [2021-06-05 18:27:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656643565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:37,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114051155] [2021-06-05 18:27:37,337 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 [2021-06-05 18:27:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:37,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:37,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114051155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:37,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:37,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:37,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638805807] [2021-06-05 18:27:37,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:37,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:37,634 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) [2021-06-05 18:27:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:38,491 INFO L93 Difference]: Finished difference Result 6181 states and 15542 transitions. [2021-06-05 18:27:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:27:38,491 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 [2021-06-05 18:27:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:38,497 INFO L225 Difference]: With dead ends: 6181 [2021-06-05 18:27:38,497 INFO L226 Difference]: Without dead ends: 5911 [2021-06-05 18:27:38,497 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=1241, Invalid=3871, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:27:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-06-05 18:27:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4038. [2021-06-05 18:27:38,543 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) [2021-06-05 18:27:38,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 11128 transitions. [2021-06-05 18:27:38,548 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 11128 transitions. Word has length 170 [2021-06-05 18:27:38,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:38,549 INFO L482 AbstractCegarLoop]: Abstraction has 4038 states and 11128 transitions. [2021-06-05 18:27:38,549 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) [2021-06-05 18:27:38,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 11128 transitions. [2021-06-05 18:27:38,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:38,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:38,552 INFO L554 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] [2021-06-05 18:27:38,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 18:27:38,752 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1818935675, now seen corresponding path program 380 times [2021-06-05 18:27:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:38,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809669157] [2021-06-05 18:27:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:39,128 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:39,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:39,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809669157] [2021-06-05 18:27:39,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809669157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:39,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690484964] [2021-06-05 18:27:39,128 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 [2021-06-05 18:27:39,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:39,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:39,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690484964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:39,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:39,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:39,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199666182] [2021-06-05 18:27:39,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:39,412 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) [2021-06-05 18:27:40,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:40,211 INFO L93 Difference]: Finished difference Result 6206 states and 15667 transitions. [2021-06-05 18:27:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:27:40,211 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 [2021-06-05 18:27:40,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:40,217 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 18:27:40,217 INFO L226 Difference]: Without dead ends: 5936 [2021-06-05 18:27:40,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 914.4ms TimeCoverageRelationStatistics Valid=1171, Invalid=3659, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:27:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2021-06-05 18:27:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 4113. [2021-06-05 18:27:40,264 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) [2021-06-05 18:27:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 11353 transitions. [2021-06-05 18:27:40,270 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 11353 transitions. Word has length 170 [2021-06-05 18:27:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:40,270 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 11353 transitions. [2021-06-05 18:27:40,270 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) [2021-06-05 18:27:40,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 11353 transitions. [2021-06-05 18:27:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:40,273 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:40,274 INFO L554 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] [2021-06-05 18:27:40,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 18:27:40,474 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:40,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:40,474 INFO L82 PathProgramCache]: Analyzing trace with hash 22411125, now seen corresponding path program 381 times [2021-06-05 18:27:40,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:40,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919751709] [2021-06-05 18:27:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:40,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:40,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919751709] [2021-06-05 18:27:40,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919751709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:40,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357783545] [2021-06-05 18:27:40,831 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 [2021-06-05 18:27:40,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:27:40,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:40,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:40,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357783545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:41,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:41,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:41,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318458833] [2021-06-05 18:27:41,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:41,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:41,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:41,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:41,138 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) [2021-06-05 18:27:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:42,069 INFO L93 Difference]: Finished difference Result 6231 states and 15792 transitions. [2021-06-05 18:27:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:27:42,070 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 [2021-06-05 18:27:42,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:42,074 INFO L225 Difference]: With dead ends: 6231 [2021-06-05 18:27:42,074 INFO L226 Difference]: Without dead ends: 5961 [2021-06-05 18:27:42,074 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1047.1ms TimeCoverageRelationStatistics Valid=1278, Invalid=4124, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:27:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5961 states. [2021-06-05 18:27:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5961 to 4188. [2021-06-05 18:27:42,114 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) [2021-06-05 18:27:42,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 11578 transitions. [2021-06-05 18:27:42,120 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 11578 transitions. Word has length 170 [2021-06-05 18:27:42,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:42,120 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 11578 transitions. [2021-06-05 18:27:42,120 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) [2021-06-05 18:27:42,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 11578 transitions. [2021-06-05 18:27:42,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:42,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:42,123 INFO L554 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] [2021-06-05 18:27:42,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 18:27:42,324 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:42,324 INFO L82 PathProgramCache]: Analyzing trace with hash 903970307, now seen corresponding path program 382 times [2021-06-05 18:27:42,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:42,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644256125] [2021-06-05 18:27:42,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:42,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644256125] [2021-06-05 18:27:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644256125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246685693] [2021-06-05 18:27:42,660 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 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 [2021-06-05 18:27:42,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:42,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:42,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246685693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:42,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:42,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:42,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315598857] [2021-06-05 18:27:42,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:42,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:42,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:42,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:42,933 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) [2021-06-05 18:27:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:43,764 INFO L93 Difference]: Finished difference Result 6256 states and 15917 transitions. [2021-06-05 18:27:43,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:27:43,765 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 [2021-06-05 18:27:43,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:43,771 INFO L225 Difference]: With dead ends: 6256 [2021-06-05 18:27:43,771 INFO L226 Difference]: Without dead ends: 5986 [2021-06-05 18:27:43,772 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1090 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=1216, Invalid=3896, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:27:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5986 states. [2021-06-05 18:27:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5986 to 4263. [2021-06-05 18:27:43,818 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) [2021-06-05 18:27:43,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 11803 transitions. [2021-06-05 18:27:43,824 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 11803 transitions. Word has length 170 [2021-06-05 18:27:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:43,824 INFO L482 AbstractCegarLoop]: Abstraction has 4263 states and 11803 transitions. [2021-06-05 18:27:43,824 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) [2021-06-05 18:27:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 11803 transitions. [2021-06-05 18:27:43,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:43,827 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:43,828 INFO L554 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] [2021-06-05 18:27:44,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:44,028 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:44,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:44,028 INFO L82 PathProgramCache]: Analyzing trace with hash 261595891, now seen corresponding path program 383 times [2021-06-05 18:27:44,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:44,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042600699] [2021-06-05 18:27:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:44,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042600699] [2021-06-05 18:27:44,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042600699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:44,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613745941] [2021-06-05 18:27:44,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:44,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:27:44,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:44,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:44,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613745941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:44,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:44,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:44,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028828598] [2021-06-05 18:27:44,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:44,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:44,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:44,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:44,666 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) [2021-06-05 18:27:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:45,646 INFO L93 Difference]: Finished difference Result 6281 states and 16042 transitions. [2021-06-05 18:27:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:27:45,646 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 [2021-06-05 18:27:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:45,652 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 18:27:45,652 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 18:27:45,653 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1083.6ms TimeCoverageRelationStatistics Valid=1331, Invalid=4369, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:27:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 18:27:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 4338. [2021-06-05 18:27:45,698 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) [2021-06-05 18:27:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4338 states to 4338 states and 12028 transitions. [2021-06-05 18:27:45,704 INFO L78 Accepts]: Start accepts. Automaton has 4338 states and 12028 transitions. Word has length 170 [2021-06-05 18:27:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:45,704 INFO L482 AbstractCegarLoop]: Abstraction has 4338 states and 12028 transitions. [2021-06-05 18:27:45,704 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) [2021-06-05 18:27:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4338 states and 12028 transitions. [2021-06-05 18:27:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:45,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:45,708 INFO L554 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] [2021-06-05 18:27:45,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:45,908 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:45,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:45,909 INFO L82 PathProgramCache]: Analyzing trace with hash 215048961, now seen corresponding path program 384 times [2021-06-05 18:27:45,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:45,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84351299] [2021-06-05 18:27:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:45,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:46,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:46,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84351299] [2021-06-05 18:27:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84351299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947232571] [2021-06-05 18:27:46,234 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 [2021-06-05 18:27:46,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:27:46,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:46,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:46,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947232571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:46,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:46,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:46,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69100275] [2021-06-05 18:27:46,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:46,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:46,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:46,517 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) [2021-06-05 18:27:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:47,378 INFO L93 Difference]: Finished difference Result 6306 states and 16167 transitions. [2021-06-05 18:27:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:27:47,379 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 [2021-06-05 18:27:47,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:47,385 INFO L225 Difference]: With dead ends: 6306 [2021-06-05 18:27:47,385 INFO L226 Difference]: Without dead ends: 6036 [2021-06-05 18:27:47,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 943.6ms TimeCoverageRelationStatistics Valid=1277, Invalid=4125, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:27:47,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-05 18:27:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4413. [2021-06-05 18:27:47,434 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) [2021-06-05 18:27:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 12253 transitions. [2021-06-05 18:27:47,440 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 12253 transitions. Word has length 170 [2021-06-05 18:27:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:47,440 INFO L482 AbstractCegarLoop]: Abstraction has 4413 states and 12253 transitions. [2021-06-05 18:27:47,440 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) [2021-06-05 18:27:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 12253 transitions. [2021-06-05 18:27:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:47,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:47,443 INFO L554 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] [2021-06-05 18:27:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2021-06-05 18:27:47,644 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:47,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:47,644 INFO L82 PathProgramCache]: Analyzing trace with hash -703335439, now seen corresponding path program 385 times [2021-06-05 18:27:47,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:47,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692904158] [2021-06-05 18:27:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:48,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692904158] [2021-06-05 18:27:48,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692904158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:48,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904224204] [2021-06-05 18:27:48,015 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 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 [2021-06-05 18:27:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:48,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904224204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:48,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:48,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:48,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859213699] [2021-06-05 18:27:48,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:48,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:48,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:48,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:48,325 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) [2021-06-05 18:27:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:49,422 INFO L93 Difference]: Finished difference Result 6331 states and 16292 transitions. [2021-06-05 18:27:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:27:49,423 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 [2021-06-05 18:27:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:49,429 INFO L225 Difference]: With dead ends: 6331 [2021-06-05 18:27:49,429 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 18:27:49,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 1155.2ms TimeCoverageRelationStatistics Valid=1400, Invalid=4606, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:27:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 18:27:49,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4488. [2021-06-05 18:27:49,478 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) [2021-06-05 18:27:49,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 12478 transitions. [2021-06-05 18:27:49,484 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 12478 transitions. Word has length 170 [2021-06-05 18:27:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:49,484 INFO L482 AbstractCegarLoop]: Abstraction has 4488 states and 12478 transitions. [2021-06-05 18:27:49,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:27:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 12478 transitions. [2021-06-05 18:27:49,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:49,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:49,488 INFO L554 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] [2021-06-05 18:27:49,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:49,688 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1814941055, now seen corresponding path program 386 times [2021-06-05 18:27:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:49,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235837532] [2021-06-05 18:27:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:50,011 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:50,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:50,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235837532] [2021-06-05 18:27:50,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235837532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:50,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117065669] [2021-06-05 18:27:50,011 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 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 [2021-06-05 18:27:50,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:27:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:50,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:50,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117065669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:50,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:50,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:50,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977402243] [2021-06-05 18:27:50,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:50,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:50,281 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) [2021-06-05 18:27:51,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:51,226 INFO L93 Difference]: Finished difference Result 6356 states and 16417 transitions. [2021-06-05 18:27:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:27:51,226 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 [2021-06-05 18:27:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:51,232 INFO L225 Difference]: With dead ends: 6356 [2021-06-05 18:27:51,232 INFO L226 Difference]: Without dead ends: 6086 [2021-06-05 18:27:51,233 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 976.6ms TimeCoverageRelationStatistics Valid=1354, Invalid=4346, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:27:51,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-05 18:27:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4563. [2021-06-05 18:27:51,281 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) [2021-06-05 18:27:51,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 12703 transitions. [2021-06-05 18:27:51,287 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 12703 transitions. Word has length 170 [2021-06-05 18:27:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:51,287 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 12703 transitions. [2021-06-05 18:27:51,287 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) [2021-06-05 18:27:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 12703 transitions. [2021-06-05 18:27:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:51,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:51,291 INFO L554 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] [2021-06-05 18:27:51,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-05 18:27:51,492 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash -380384657, now seen corresponding path program 387 times [2021-06-05 18:27:51,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:51,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736091578] [2021-06-05 18:27:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:51,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736091578] [2021-06-05 18:27:51,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736091578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:51,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636653291] [2021-06-05 18:27:51,828 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 [2021-06-05 18:27:51,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:27:51,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:51,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:52,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636653291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:52,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:52,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:52,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058893056] [2021-06-05 18:27:52,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:52,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:52,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:52,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:52,130 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) [2021-06-05 18:27:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:53,252 INFO L93 Difference]: Finished difference Result 6381 states and 16542 transitions. [2021-06-05 18:27:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:27:53,252 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 [2021-06-05 18:27:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:53,258 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 18:27:53,258 INFO L226 Difference]: Without dead ends: 6111 [2021-06-05 18:27:53,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 1167.6ms TimeCoverageRelationStatistics Valid=1485, Invalid=4835, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:27:53,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-05 18:27:53,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4638. [2021-06-05 18:27:53,309 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) [2021-06-05 18:27:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4638 states to 4638 states and 12928 transitions. [2021-06-05 18:27:53,315 INFO L78 Accepts]: Start accepts. Automaton has 4638 states and 12928 transitions. Word has length 170 [2021-06-05 18:27:53,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:53,315 INFO L482 AbstractCegarLoop]: Abstraction has 4638 states and 12928 transitions. [2021-06-05 18:27:53,316 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) [2021-06-05 18:27:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4638 states and 12928 transitions. [2021-06-05 18:27:53,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:53,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:53,319 INFO L554 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] [2021-06-05 18:27:53,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:53,520 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1129815421, now seen corresponding path program 388 times [2021-06-05 18:27:53,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:53,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870589676] [2021-06-05 18:27:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:53,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870589676] [2021-06-05 18:27:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870589676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:53,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046806444] [2021-06-05 18:27:53,866 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 [2021-06-05 18:27:53,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:27:53,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:53,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:53,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:54,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046806444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:54,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:54,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:54,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821031396] [2021-06-05 18:27:54,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:54,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:54,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:54,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:54,137 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) [2021-06-05 18:27:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:55,114 INFO L93 Difference]: Finished difference Result 6406 states and 16667 transitions. [2021-06-05 18:27:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:27:55,115 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 [2021-06-05 18:27:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:55,121 INFO L225 Difference]: With dead ends: 6406 [2021-06-05 18:27:55,121 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 18:27:55,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1035.9ms TimeCoverageRelationStatistics Valid=1447, Invalid=4559, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:27:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 18:27:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4713. [2021-06-05 18:27:55,173 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) [2021-06-05 18:27:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 13153 transitions. [2021-06-05 18:27:55,180 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 13153 transitions. Word has length 170 [2021-06-05 18:27:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:55,180 INFO L482 AbstractCegarLoop]: Abstraction has 4713 states and 13153 transitions. [2021-06-05 18:27:55,180 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) [2021-06-05 18:27:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 13153 transitions. [2021-06-05 18:27:55,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:55,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:55,185 INFO L554 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] [2021-06-05 18:27:55,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:55,391 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:55,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1769473645, now seen corresponding path program 389 times [2021-06-05 18:27:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:55,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322446782] [2021-06-05 18:27:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:55,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322446782] [2021-06-05 18:27:55,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322446782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:55,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591530566] [2021-06-05 18:27:55,732 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 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 [2021-06-05 18:27:55,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:27:55,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:55,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:56,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591530566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:56,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:56,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:27:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450228197] [2021-06-05 18:27:56,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:27:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:56,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:27:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:27:56,016 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) [2021-06-05 18:27:57,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:57,223 INFO L93 Difference]: Finished difference Result 6431 states and 16792 transitions. [2021-06-05 18:27:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:27:57,223 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 [2021-06-05 18:27:57,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:57,229 INFO L225 Difference]: With dead ends: 6431 [2021-06-05 18:27:57,229 INFO L226 Difference]: Without dead ends: 6161 [2021-06-05 18:27:57,230 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1237.8ms TimeCoverageRelationStatistics Valid=1586, Invalid=5056, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:27:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-05 18:27:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4788. [2021-06-05 18:27:57,280 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) [2021-06-05 18:27:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4788 states to 4788 states and 13378 transitions. [2021-06-05 18:27:57,286 INFO L78 Accepts]: Start accepts. Automaton has 4788 states and 13378 transitions. Word has length 170 [2021-06-05 18:27:57,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:57,286 INFO L482 AbstractCegarLoop]: Abstraction has 4788 states and 13378 transitions. [2021-06-05 18:27:57,286 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) [2021-06-05 18:27:57,286 INFO L276 IsEmpty]: Start isEmpty. Operand 4788 states and 13378 transitions. [2021-06-05 18:27:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:57,290 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:57,290 INFO L554 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] [2021-06-05 18:27:57,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable397,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:27:57,491 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash 994554619, now seen corresponding path program 390 times [2021-06-05 18:27:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:57,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800131920] [2021-06-05 18:27:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:57,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800131920] [2021-06-05 18:27:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800131920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:57,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337010948] [2021-06-05 18:27:57,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:27:57,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:27:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:27:57,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:57,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:27:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:58,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337010948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:58,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:27:58,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:27:58,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17685050] [2021-06-05 18:27:58,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:27:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:27:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:27:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:27:58,112 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) [2021-06-05 18:27:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:27:59,155 INFO L93 Difference]: Finished difference Result 6456 states and 16917 transitions. [2021-06-05 18:27:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:27:59,155 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 [2021-06-05 18:27:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:27:59,162 INFO L225 Difference]: With dead ends: 6456 [2021-06-05 18:27:59,162 INFO L226 Difference]: Without dead ends: 6186 [2021-06-05 18:27:59,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 1046.1ms TimeCoverageRelationStatistics Valid=1556, Invalid=4764, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:27:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-05 18:27:59,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4863. [2021-06-05 18:27:59,216 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) [2021-06-05 18:27:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4863 states to 4863 states and 13603 transitions. [2021-06-05 18:27:59,222 INFO L78 Accepts]: Start accepts. Automaton has 4863 states and 13603 transitions. Word has length 170 [2021-06-05 18:27:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:27:59,223 INFO L482 AbstractCegarLoop]: Abstraction has 4863 states and 13603 transitions. [2021-06-05 18:27:59,223 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) [2021-06-05 18:27:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4863 states and 13603 transitions. [2021-06-05 18:27:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:27:59,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:27:59,227 INFO L554 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] [2021-06-05 18:27:59,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 18:27:59,440 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:27:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:27:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 540641259, now seen corresponding path program 391 times [2021-06-05 18:27:59,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:27:59,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476986330] [2021-06-05 18:27:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:27:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:27:59,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:27:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476986330] [2021-06-05 18:27:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476986330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:27:59,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147371837] [2021-06-05 18:27:59,795 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 [2021-06-05 18:27:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:27:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:27:59,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:00,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147371837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:00,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:00,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:00,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950455845] [2021-06-05 18:28:00,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:00,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:00,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:00,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:00,090 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) [2021-06-05 18:28:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:01,332 INFO L93 Difference]: Finished difference Result 6481 states and 17042 transitions. [2021-06-05 18:28:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:28:01,333 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 [2021-06-05 18:28:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:01,340 INFO L225 Difference]: With dead ends: 6481 [2021-06-05 18:28:01,340 INFO L226 Difference]: Without dead ends: 6211 [2021-06-05 18:28:01,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1293.8ms TimeCoverageRelationStatistics Valid=1703, Invalid=5269, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:28:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-05 18:28:01,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4938. [2021-06-05 18:28:01,395 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) [2021-06-05 18:28:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4938 states to 4938 states and 13828 transitions. [2021-06-05 18:28:01,402 INFO L78 Accepts]: Start accepts. Automaton has 4938 states and 13828 transitions. Word has length 170 [2021-06-05 18:28:01,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:01,402 INFO L482 AbstractCegarLoop]: Abstraction has 4938 states and 13828 transitions. [2021-06-05 18:28:01,402 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) [2021-06-05 18:28:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4938 states and 13828 transitions. [2021-06-05 18:28:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:01,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:01,406 INFO L554 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] [2021-06-05 18:28:01,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable399,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:01,606 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:01,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:01,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1418653177, now seen corresponding path program 392 times [2021-06-05 18:28:01,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:01,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373846661] [2021-06-05 18:28:01,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:01,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:01,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373846661] [2021-06-05 18:28:01,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373846661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:01,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317451640] [2021-06-05 18:28:01,920 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 [2021-06-05 18:28:01,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:01,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:01,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:01,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:02,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317451640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:02,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:02,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:02,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241354491] [2021-06-05 18:28:02,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:02,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:02,203 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) [2021-06-05 18:28:03,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:03,318 INFO L93 Difference]: Finished difference Result 6506 states and 17167 transitions. [2021-06-05 18:28:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:28:03,318 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 [2021-06-05 18:28:03,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:03,325 INFO L225 Difference]: With dead ends: 6506 [2021-06-05 18:28:03,325 INFO L226 Difference]: Without dead ends: 6236 [2021-06-05 18:28:03,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1095.7ms TimeCoverageRelationStatistics Valid=1681, Invalid=4961, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:28:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-05 18:28:03,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 5013. [2021-06-05 18:28:03,379 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) [2021-06-05 18:28:03,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 14053 transitions. [2021-06-05 18:28:03,386 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 14053 transitions. Word has length 170 [2021-06-05 18:28:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:03,386 INFO L482 AbstractCegarLoop]: Abstraction has 5013 states and 14053 transitions. [2021-06-05 18:28:03,386 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) [2021-06-05 18:28:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 14053 transitions. [2021-06-05 18:28:03,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:03,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:03,390 INFO L554 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] [2021-06-05 18:28:03,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 18:28:03,591 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:03,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:03,591 INFO L82 PathProgramCache]: Analyzing trace with hash 518598377, now seen corresponding path program 393 times [2021-06-05 18:28:03,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:03,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584301438] [2021-06-05 18:28:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:03,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584301438] [2021-06-05 18:28:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584301438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:03,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544023838] [2021-06-05 18:28:03,908 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 [2021-06-05 18:28:03,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:03,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:03,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:04,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544023838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:04,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:04,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:04,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702315715] [2021-06-05 18:28:04,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:04,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:04,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:04,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:04,225 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) [2021-06-05 18:28:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:05,593 INFO L93 Difference]: Finished difference Result 6531 states and 17292 transitions. [2021-06-05 18:28:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:28:05,593 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 [2021-06-05 18:28:05,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:05,624 INFO L225 Difference]: With dead ends: 6531 [2021-06-05 18:28:05,624 INFO L226 Difference]: Without dead ends: 6261 [2021-06-05 18:28:05,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 1321.5ms TimeCoverageRelationStatistics Valid=1836, Invalid=5474, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:28:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-05 18:28:05,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 5088. [2021-06-05 18:28:05,674 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) [2021-06-05 18:28:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 14278 transitions. [2021-06-05 18:28:05,682 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 14278 transitions. Word has length 170 [2021-06-05 18:28:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:05,682 INFO L482 AbstractCegarLoop]: Abstraction has 5088 states and 14278 transitions. [2021-06-05 18:28:05,682 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) [2021-06-05 18:28:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 14278 transitions. [2021-06-05 18:28:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:05,686 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:05,686 INFO L554 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] [2021-06-05 18:28:05,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 18:28:05,887 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash 89534071, now seen corresponding path program 394 times [2021-06-05 18:28:05,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:05,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468410142] [2021-06-05 18:28:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:06,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468410142] [2021-06-05 18:28:06,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468410142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:06,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056965831] [2021-06-05 18:28:06,198 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 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 [2021-06-05 18:28:06,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:06,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:06,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:06,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056965831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:06,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:06,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:06,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941589982] [2021-06-05 18:28:06,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:06,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:06,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:06,480 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) [2021-06-05 18:28:07,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:07,589 INFO L93 Difference]: Finished difference Result 6556 states and 17417 transitions. [2021-06-05 18:28:07,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:28:07,590 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 [2021-06-05 18:28:07,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:07,597 INFO L225 Difference]: With dead ends: 6556 [2021-06-05 18:28:07,597 INFO L226 Difference]: Without dead ends: 6286 [2021-06-05 18:28:07,598 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1114.3ms TimeCoverageRelationStatistics Valid=1822, Invalid=5150, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:28:07,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-05 18:28:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 5163. [2021-06-05 18:28:07,656 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) [2021-06-05 18:28:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 14503 transitions. [2021-06-05 18:28:07,664 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 14503 transitions. Word has length 170 [2021-06-05 18:28:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:07,664 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 14503 transitions. [2021-06-05 18:28:07,664 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) [2021-06-05 18:28:07,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 14503 transitions. [2021-06-05 18:28:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:07,668 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:07,668 INFO L554 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] [2021-06-05 18:28:07,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:07,869 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:07,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:07,869 INFO L82 PathProgramCache]: Analyzing trace with hash -596649113, now seen corresponding path program 395 times [2021-06-05 18:28:07,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:07,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867711772] [2021-06-05 18:28:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:08,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:08,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867711772] [2021-06-05 18:28:08,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867711772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:08,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734256125] [2021-06-05 18:28:08,186 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 [2021-06-05 18:28:08,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:08,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:08,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734256125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:08,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:08,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:08,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700356114] [2021-06-05 18:28:08,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:08,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:08,503 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) [2021-06-05 18:28:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:09,910 INFO L93 Difference]: Finished difference Result 6581 states and 17542 transitions. [2021-06-05 18:28:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:28:09,910 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 [2021-06-05 18:28:09,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:09,917 INFO L225 Difference]: With dead ends: 6581 [2021-06-05 18:28:09,917 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 18:28:09,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1367.6ms TimeCoverageRelationStatistics Valid=1985, Invalid=5671, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:28:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 18:28:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5238. [2021-06-05 18:28:09,976 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) [2021-06-05 18:28:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5238 states to 5238 states and 14728 transitions. [2021-06-05 18:28:09,983 INFO L78 Accepts]: Start accepts. Automaton has 5238 states and 14728 transitions. Word has length 170 [2021-06-05 18:28:09,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:09,984 INFO L482 AbstractCegarLoop]: Abstraction has 5238 states and 14728 transitions. [2021-06-05 18:28:09,984 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) [2021-06-05 18:28:09,984 INFO L276 IsEmpty]: Start isEmpty. Operand 5238 states and 14728 transitions. [2021-06-05 18:28:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:09,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:09,988 INFO L554 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] [2021-06-05 18:28:10,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable403 [2021-06-05 18:28:10,189 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -681683851, now seen corresponding path program 396 times [2021-06-05 18:28:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:10,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092996652] [2021-06-05 18:28:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:10,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092996652] [2021-06-05 18:28:10,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092996652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:10,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110541458] [2021-06-05 18:28:10,504 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 [2021-06-05 18:28:10,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:10,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:10,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:10,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:10,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110541458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:10,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:10,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:10,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482942842] [2021-06-05 18:28:10,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:10,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:10,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:10,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:10,777 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) [2021-06-05 18:28:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:11,979 INFO L93 Difference]: Finished difference Result 6606 states and 17667 transitions. [2021-06-05 18:28:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:28:11,979 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 [2021-06-05 18:28:11,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:11,985 INFO L225 Difference]: With dead ends: 6606 [2021-06-05 18:28:11,986 INFO L226 Difference]: Without dead ends: 6336 [2021-06-05 18:28:11,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1183.1ms TimeCoverageRelationStatistics Valid=1979, Invalid=5331, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:28:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-05 18:28:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 5313. [2021-06-05 18:28:12,041 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) [2021-06-05 18:28:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5313 states to 5313 states and 14953 transitions. [2021-06-05 18:28:12,049 INFO L78 Accepts]: Start accepts. Automaton has 5313 states and 14953 transitions. Word has length 170 [2021-06-05 18:28:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:12,049 INFO L482 AbstractCegarLoop]: Abstraction has 5313 states and 14953 transitions. [2021-06-05 18:28:12,049 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) [2021-06-05 18:28:12,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5313 states and 14953 transitions. [2021-06-05 18:28:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:12,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:12,054 INFO L554 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] [2021-06-05 18:28:12,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 18:28:12,255 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:12,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:12,255 INFO L82 PathProgramCache]: Analyzing trace with hash -749834907, now seen corresponding path program 397 times [2021-06-05 18:28:12,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:12,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703758346] [2021-06-05 18:28:12,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:12,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703758346] [2021-06-05 18:28:12,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703758346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:12,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280896489] [2021-06-05 18:28:12,568 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 [2021-06-05 18:28:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:12,846 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:12,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280896489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:12,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:12,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:12,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635895484] [2021-06-05 18:28:12,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:12,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:12,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:12,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:12,847 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) [2021-06-05 18:28:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:14,328 INFO L93 Difference]: Finished difference Result 6631 states and 17792 transitions. [2021-06-05 18:28:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:28:14,328 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 [2021-06-05 18:28:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:14,335 INFO L225 Difference]: With dead ends: 6631 [2021-06-05 18:28:14,335 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 18:28:14,336 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1430.9ms TimeCoverageRelationStatistics Valid=2150, Invalid=5860, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:28:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 18:28:14,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 5388. [2021-06-05 18:28:14,416 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) [2021-06-05 18:28:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5388 states to 5388 states and 15178 transitions. [2021-06-05 18:28:14,424 INFO L78 Accepts]: Start accepts. Automaton has 5388 states and 15178 transitions. Word has length 170 [2021-06-05 18:28:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:14,424 INFO L482 AbstractCegarLoop]: Abstraction has 5388 states and 15178 transitions. [2021-06-05 18:28:14,424 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) [2021-06-05 18:28:14,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5388 states and 15178 transitions. [2021-06-05 18:28:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:14,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:14,428 INFO L554 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] [2021-06-05 18:28:14,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:14,629 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash -2046803981, now seen corresponding path program 398 times [2021-06-05 18:28:14,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:14,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233471049] [2021-06-05 18:28:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:14,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:14,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233471049] [2021-06-05 18:28:14,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233471049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:14,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691631884] [2021-06-05 18:28:14,944 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 [2021-06-05 18:28:15,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:15,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:15,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:15,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691631884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:15,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:15,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277742972] [2021-06-05 18:28:15,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:15,208 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) [2021-06-05 18:28:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:16,434 INFO L93 Difference]: Finished difference Result 6656 states and 17917 transitions. [2021-06-05 18:28:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:28:16,435 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 [2021-06-05 18:28:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:16,444 INFO L225 Difference]: With dead ends: 6656 [2021-06-05 18:28:16,444 INFO L226 Difference]: Without dead ends: 6386 [2021-06-05 18:28:16,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 1199.3ms TimeCoverageRelationStatistics Valid=2152, Invalid=5504, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:28:16,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-05 18:28:16,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5463. [2021-06-05 18:28:16,506 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) [2021-06-05 18:28:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5463 states to 5463 states and 15403 transitions. [2021-06-05 18:28:16,514 INFO L78 Accepts]: Start accepts. Automaton has 5463 states and 15403 transitions. Word has length 170 [2021-06-05 18:28:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:16,515 INFO L482 AbstractCegarLoop]: Abstraction has 5463 states and 15403 transitions. [2021-06-05 18:28:16,515 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) [2021-06-05 18:28:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5463 states and 15403 transitions. [2021-06-05 18:28:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:16,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:16,519 INFO L554 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] [2021-06-05 18:28:16,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:16,720 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1617050397, now seen corresponding path program 399 times [2021-06-05 18:28:16,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:16,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162826781] [2021-06-05 18:28:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:17,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:17,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162826781] [2021-06-05 18:28:17,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162826781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:17,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799616307] [2021-06-05 18:28:17,038 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 [2021-06-05 18:28:17,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:17,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:17,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:17,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799616307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:17,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:17,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:17,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213755069] [2021-06-05 18:28:17,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:17,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:17,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:17,330 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) [2021-06-05 18:28:18,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:18,868 INFO L93 Difference]: Finished difference Result 6741 states and 18207 transitions. [2021-06-05 18:28:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:28:18,869 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 [2021-06-05 18:28:18,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:18,876 INFO L225 Difference]: With dead ends: 6741 [2021-06-05 18:28:18,877 INFO L226 Difference]: Without dead ends: 6471 [2021-06-05 18:28:18,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 1496.9ms TimeCoverageRelationStatistics Valid=2331, Invalid=6041, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 18:28:18,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2021-06-05 18:28:18,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 5538. [2021-06-05 18:28:18,940 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) [2021-06-05 18:28:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5538 states to 5538 states and 15648 transitions. [2021-06-05 18:28:18,948 INFO L78 Accepts]: Start accepts. Automaton has 5538 states and 15648 transitions. Word has length 170 [2021-06-05 18:28:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:18,949 INFO L482 AbstractCegarLoop]: Abstraction has 5538 states and 15648 transitions. [2021-06-05 18:28:18,949 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) [2021-06-05 18:28:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5538 states and 15648 transitions. [2021-06-05 18:28:18,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:18,953 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:18,953 INFO L554 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] [2021-06-05 18:28:19,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:19,154 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:19,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:19,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1674784527, now seen corresponding path program 400 times [2021-06-05 18:28:19,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:19,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247919784] [2021-06-05 18:28:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:19,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247919784] [2021-06-05 18:28:19,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247919784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:19,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097312709] [2021-06-05 18:28:19,467 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 [2021-06-05 18:28:19,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:19,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:19,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:19,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:19,727 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:19,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097312709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:19,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:19,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-06-05 18:28:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384744860] [2021-06-05 18:28:19,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-06-05 18:28:19,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-06-05 18:28:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:28:19,728 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) [2021-06-05 18:28:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:21,011 INFO L93 Difference]: Finished difference Result 7508 states and 20381 transitions. [2021-06-05 18:28:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:28:21,011 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 [2021-06-05 18:28:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:21,018 INFO L225 Difference]: With dead ends: 7508 [2021-06-05 18:28:21,018 INFO L226 Difference]: Without dead ends: 7238 [2021-06-05 18:28:21,019 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 1261.2ms TimeCoverageRelationStatistics Valid=2342, Invalid=5668, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:28:21,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-05 18:28:21,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 5718. [2021-06-05 18:28:21,078 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) [2021-06-05 18:28:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5718 states to 5718 states and 16207 transitions. [2021-06-05 18:28:21,087 INFO L78 Accepts]: Start accepts. Automaton has 5718 states and 16207 transitions. Word has length 170 [2021-06-05 18:28:21,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:21,087 INFO L482 AbstractCegarLoop]: Abstraction has 5718 states and 16207 transitions. [2021-06-05 18:28:21,087 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) [2021-06-05 18:28:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5718 states and 16207 transitions. [2021-06-05 18:28:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-06-05 18:28:21,091 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:21,092 INFO L554 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] [2021-06-05 18:28:21,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:21,292 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:21,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1652441277, now seen corresponding path program 401 times [2021-06-05 18:28:21,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:21,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985942845] [2021-06-05 18:28:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:21,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:21,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985942845] [2021-06-05 18:28:21,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985942845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:21,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413755502] [2021-06-05 18:28:21,604 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 [2021-06-05 18:28:21,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:21,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 18:28:21,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 0 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:21,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413755502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:21,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:21,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-06-05 18:28:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193081455] [2021-06-05 18:28:21,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:21,886 INFO L87 Difference]: Start difference. First operand 5718 states and 16207 transitions. Second operand has 34 states, 34 states have (on average 5.0588235294117645) internal successors, (172), 34 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:23,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:23,438 INFO L93 Difference]: Finished difference Result 6995 states and 19081 transitions. [2021-06-05 18:28:23,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:28:23,438 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 [2021-06-05 18:28:23,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:23,444 INFO L225 Difference]: With dead ends: 6995 [2021-06-05 18:28:23,444 INFO L226 Difference]: Without dead ends: 6506 [2021-06-05 18:28:23,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1537.9ms TimeCoverageRelationStatistics Valid=2531, Invalid=6211, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 18:28:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6506 states. [2021-06-05 18:28:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6506 to 3713. [2021-06-05 18:28:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3713 states, 3712 states have (on average 2.741918103448276) internal successors, (10178), 3712 states have internal predecessors, (10178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:23,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3713 states to 3713 states and 10178 transitions. [2021-06-05 18:28:23,488 INFO L78 Accepts]: Start accepts. Automaton has 3713 states and 10178 transitions. Word has length 170 [2021-06-05 18:28:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:23,488 INFO L482 AbstractCegarLoop]: Abstraction has 3713 states and 10178 transitions. [2021-06-05 18:28:23,488 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) [2021-06-05 18:28:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3713 states and 10178 transitions. [2021-06-05 18:28:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:23,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:23,491 INFO L554 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] [2021-06-05 18:28:23,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:23,692 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:23,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:23,692 INFO L82 PathProgramCache]: Analyzing trace with hash 420129948, now seen corresponding path program 402 times [2021-06-05 18:28:23,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:23,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490988921] [2021-06-05 18:28:23,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:24,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:24,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490988921] [2021-06-05 18:28:24,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490988921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:24,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300908305] [2021-06-05 18:28:24,093 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 [2021-06-05 18:28:24,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:24,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:24,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300908305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:24,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:24,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:24,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553335513] [2021-06-05 18:28:24,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:24,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:24,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:24,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:24,393 INFO L87 Difference]: Start difference. First operand 3713 states and 10178 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:25,127 INFO L93 Difference]: Finished difference Result 5531 states and 14017 transitions. [2021-06-05 18:28:25,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:28:25,128 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:25,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:25,133 INFO L225 Difference]: With dead ends: 5531 [2021-06-05 18:28:25,133 INFO L226 Difference]: Without dead ends: 5261 [2021-06-05 18:28:25,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 891.2ms TimeCoverageRelationStatistics Valid=1223, Invalid=3333, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:28:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-06-05 18:28:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 3788. [2021-06-05 18:28:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.7470293108001056) internal successors, (10403), 3787 states have internal predecessors, (10403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10403 transitions. [2021-06-05 18:28:25,179 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10403 transitions. Word has length 175 [2021-06-05 18:28:25,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:25,179 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10403 transitions. [2021-06-05 18:28:25,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10403 transitions. [2021-06-05 18:28:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:25,182 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:25,182 INFO L554 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] [2021-06-05 18:28:25,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 18:28:25,383 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:25,383 INFO L82 PathProgramCache]: Analyzing trace with hash -520806004, now seen corresponding path program 403 times [2021-06-05 18:28:25,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:25,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429155946] [2021-06-05 18:28:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:25,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429155946] [2021-06-05 18:28:25,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429155946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:25,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672679258] [2021-06-05 18:28:25,802 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 [2021-06-05 18:28:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:25,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:25,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:26,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672679258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:26,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:26,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:26,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949023555] [2021-06-05 18:28:26,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:26,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:26,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:26,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:26,106 INFO L87 Difference]: Start difference. First operand 3788 states and 10403 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:26,886 INFO L93 Difference]: Finished difference Result 6251 states and 15532 transitions. [2021-06-05 18:28:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:28:26,886 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 [2021-06-05 18:28:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:26,892 INFO L225 Difference]: With dead ends: 6251 [2021-06-05 18:28:26,892 INFO L226 Difference]: Without dead ends: 5981 [2021-06-05 18:28:26,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 972.6ms TimeCoverageRelationStatistics Valid=1291, Invalid=3679, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:28:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2021-06-05 18:28:26,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 3863. [2021-06-05 18:28:26,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.7519419989642673) internal successors, (10628), 3862 states have internal predecessors, (10628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:26,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10628 transitions. [2021-06-05 18:28:26,938 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10628 transitions. Word has length 175 [2021-06-05 18:28:26,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:26,938 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10628 transitions. [2021-06-05 18:28:26,938 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) [2021-06-05 18:28:26,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10628 transitions. [2021-06-05 18:28:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:26,941 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:26,941 INFO L554 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] [2021-06-05 18:28:27,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 18:28:27,142 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:27,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:27,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1110522778, now seen corresponding path program 404 times [2021-06-05 18:28:27,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:27,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697279085] [2021-06-05 18:28:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697279085] [2021-06-05 18:28:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697279085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755176037] [2021-06-05 18:28:27,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:28:27,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:27,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:27,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755176037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:27,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:27,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:27,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031207565] [2021-06-05 18:28:27,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:27,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:27,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:27,825 INFO L87 Difference]: Start difference. First operand 3863 states and 10628 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:28,570 INFO L93 Difference]: Finished difference Result 6281 states and 15667 transitions. [2021-06-05 18:28:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:28:28,570 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:28,576 INFO L225 Difference]: With dead ends: 6281 [2021-06-05 18:28:28,577 INFO L226 Difference]: Without dead ends: 6011 [2021-06-05 18:28:28,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 911.3ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 18:28:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6011 states. [2021-06-05 18:28:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6011 to 3938. [2021-06-05 18:28:28,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 2.7566675133350267) internal successors, (10853), 3937 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 10853 transitions. [2021-06-05 18:28:28,625 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 10853 transitions. Word has length 175 [2021-06-05 18:28:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:28,626 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 10853 transitions. [2021-06-05 18:28:28,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:28,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 10853 transitions. [2021-06-05 18:28:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:28,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:28,629 INFO L554 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] [2021-06-05 18:28:28,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:28,829 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 265034890, now seen corresponding path program 405 times [2021-06-05 18:28:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:28,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316223038] [2021-06-05 18:28:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:29,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:29,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316223038] [2021-06-05 18:28:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316223038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:29,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79064659] [2021-06-05 18:28:29,228 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 [2021-06-05 18:28:29,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:29,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:29,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79064659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:29,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:29,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:29,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110778695] [2021-06-05 18:28:29,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:29,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:29,570 INFO L87 Difference]: Start difference. First operand 3938 states and 10853 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:30,435 INFO L93 Difference]: Finished difference Result 6306 states and 15792 transitions. [2021-06-05 18:28:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:28:30,435 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 [2021-06-05 18:28:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:30,441 INFO L225 Difference]: With dead ends: 6306 [2021-06-05 18:28:30,441 INFO L226 Difference]: Without dead ends: 6036 [2021-06-05 18:28:30,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 1001.2ms TimeCoverageRelationStatistics Valid=1303, Invalid=3953, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:28:30,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6036 states. [2021-06-05 18:28:30,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6036 to 4013. [2021-06-05 18:28:30,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 4012 states have (on average 2.7612163509471586) internal successors, (11078), 4012 states have internal predecessors, (11078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 11078 transitions. [2021-06-05 18:28:30,490 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 11078 transitions. Word has length 175 [2021-06-05 18:28:30,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:30,490 INFO L482 AbstractCegarLoop]: Abstraction has 4013 states and 11078 transitions. [2021-06-05 18:28:30,490 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) [2021-06-05 18:28:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 11078 transitions. [2021-06-05 18:28:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:30,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:30,493 INFO L554 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] [2021-06-05 18:28:30,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 18:28:30,693 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:30,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1640968168, now seen corresponding path program 406 times [2021-06-05 18:28:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:30,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732929858] [2021-06-05 18:28:30,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:31,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732929858] [2021-06-05 18:28:31,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732929858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:31,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107036687] [2021-06-05 18:28:31,064 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 [2021-06-05 18:28:31,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:31,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:31,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:31,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:31,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107036687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:31,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:31,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:31,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122293115] [2021-06-05 18:28:31,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:31,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:31,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:31,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:31,351 INFO L87 Difference]: Start difference. First operand 4013 states and 11078 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:32,189 INFO L93 Difference]: Finished difference Result 6331 states and 15917 transitions. [2021-06-05 18:28:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:28:32,189 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:32,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:32,193 INFO L225 Difference]: With dead ends: 6331 [2021-06-05 18:28:32,194 INFO L226 Difference]: Without dead ends: 6061 [2021-06-05 18:28:32,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 926.3ms TimeCoverageRelationStatistics Valid=1307, Invalid=3949, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:28:32,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-06-05 18:28:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4088. [2021-06-05 18:28:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4088 states, 4087 states have (on average 2.7655982383166138) internal successors, (11303), 4087 states have internal predecessors, (11303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4088 states to 4088 states and 11303 transitions. [2021-06-05 18:28:32,237 INFO L78 Accepts]: Start accepts. Automaton has 4088 states and 11303 transitions. Word has length 175 [2021-06-05 18:28:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:32,238 INFO L482 AbstractCegarLoop]: Abstraction has 4088 states and 11303 transitions. [2021-06-05 18:28:32,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4088 states and 11303 transitions. [2021-06-05 18:28:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:32,241 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:32,241 INFO L554 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] [2021-06-05 18:28:32,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-05 18:28:32,441 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash -757916408, now seen corresponding path program 407 times [2021-06-05 18:28:32,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:32,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837111414] [2021-06-05 18:28:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:32,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837111414] [2021-06-05 18:28:32,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837111414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:32,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305170223] [2021-06-05 18:28:32,825 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 [2021-06-05 18:28:32,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:32,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:32,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:33,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305170223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:33,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:33,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:33,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204638397] [2021-06-05 18:28:33,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:33,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:33,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:33,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:33,125 INFO L87 Difference]: Start difference. First operand 4088 states and 11303 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:34,034 INFO L93 Difference]: Finished difference Result 6356 states and 16042 transitions. [2021-06-05 18:28:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:28:34,035 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 [2021-06-05 18:28:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:34,041 INFO L225 Difference]: With dead ends: 6356 [2021-06-05 18:28:34,041 INFO L226 Difference]: Without dead ends: 6086 [2021-06-05 18:28:34,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1033.6ms TimeCoverageRelationStatistics Valid=1331, Invalid=4219, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:28:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6086 states. [2021-06-05 18:28:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6086 to 4163. [2021-06-05 18:28:34,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4162 states have (on average 2.7698222008649687) internal successors, (11528), 4162 states have internal predecessors, (11528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:34,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 11528 transitions. [2021-06-05 18:28:34,091 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 11528 transitions. Word has length 175 [2021-06-05 18:28:34,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:34,091 INFO L482 AbstractCegarLoop]: Abstraction has 4163 states and 11528 transitions. [2021-06-05 18:28:34,091 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) [2021-06-05 18:28:34,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 11528 transitions. [2021-06-05 18:28:34,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:34,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:34,095 INFO L554 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] [2021-06-05 18:28:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2021-06-05 18:28:34,311 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:34,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:34,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1644841494, now seen corresponding path program 408 times [2021-06-05 18:28:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:34,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564715457] [2021-06-05 18:28:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:34,671 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:34,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:34,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564715457] [2021-06-05 18:28:34,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564715457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:34,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795846471] [2021-06-05 18:28:34,671 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 [2021-06-05 18:28:34,753 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:34,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:34,964 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:34,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795846471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:34,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:34,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:34,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724002404] [2021-06-05 18:28:34,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:34,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:34,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:34,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:34,965 INFO L87 Difference]: Start difference. First operand 4163 states and 11528 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:35,864 INFO L93 Difference]: Finished difference Result 6381 states and 16167 transitions. [2021-06-05 18:28:35,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:28:35,864 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:35,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:35,870 INFO L225 Difference]: With dead ends: 6381 [2021-06-05 18:28:35,870 INFO L226 Difference]: Without dead ends: 6111 [2021-06-05 18:28:35,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 948.6ms TimeCoverageRelationStatistics Valid=1349, Invalid=4201, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:28:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6111 states. [2021-06-05 18:28:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6111 to 4238. [2021-06-05 18:28:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4238 states, 4237 states have (on average 2.773896624970498) internal successors, (11753), 4237 states have internal predecessors, (11753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4238 states to 4238 states and 11753 transitions. [2021-06-05 18:28:35,928 INFO L78 Accepts]: Start accepts. Automaton has 4238 states and 11753 transitions. Word has length 175 [2021-06-05 18:28:35,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:35,928 INFO L482 AbstractCegarLoop]: Abstraction has 4238 states and 11753 transitions. [2021-06-05 18:28:35,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4238 states and 11753 transitions. [2021-06-05 18:28:35,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:35,932 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:35,932 INFO L554 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] [2021-06-05 18:28:36,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable416 [2021-06-05 18:28:36,132 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:36,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash -808779002, now seen corresponding path program 409 times [2021-06-05 18:28:36,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:36,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767077953] [2021-06-05 18:28:36,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:36,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:36,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:36,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767077953] [2021-06-05 18:28:36,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767077953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:36,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292054960] [2021-06-05 18:28:36,525 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 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 [2021-06-05 18:28:36,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:36,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:36,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:36,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292054960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:36,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:36,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:36,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237102971] [2021-06-05 18:28:36,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:36,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:36,822 INFO L87 Difference]: Start difference. First operand 4238 states and 11753 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:37,801 INFO L93 Difference]: Finished difference Result 6406 states and 16292 transitions. [2021-06-05 18:28:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:28:37,801 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 [2021-06-05 18:28:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:37,807 INFO L225 Difference]: With dead ends: 6406 [2021-06-05 18:28:37,807 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 18:28:37,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 1078.0ms TimeCoverageRelationStatistics Valid=1375, Invalid=4477, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:28:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 18:28:37,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 4313. [2021-06-05 18:28:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4313 states, 4312 states have (on average 2.777829313543599) internal successors, (11978), 4312 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 11978 transitions. [2021-06-05 18:28:37,862 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 11978 transitions. Word has length 175 [2021-06-05 18:28:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:37,862 INFO L482 AbstractCegarLoop]: Abstraction has 4313 states and 11978 transitions. [2021-06-05 18:28:37,862 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) [2021-06-05 18:28:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 11978 transitions. [2021-06-05 18:28:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:37,866 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:37,866 INFO L554 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] [2021-06-05 18:28:38,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:38,066 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:38,067 INFO L82 PathProgramCache]: Analyzing trace with hash 72780180, now seen corresponding path program 410 times [2021-06-05 18:28:38,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:38,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880719222] [2021-06-05 18:28:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:38,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880719222] [2021-06-05 18:28:38,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880719222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:38,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564351955] [2021-06-05 18:28:38,448 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 [2021-06-05 18:28:38,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:38,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:38,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564351955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:38,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:38,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:38,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47869496] [2021-06-05 18:28:38,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:38,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:38,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:38,731 INFO L87 Difference]: Start difference. First operand 4313 states and 11978 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:39,667 INFO L93 Difference]: Finished difference Result 6431 states and 16417 transitions. [2021-06-05 18:28:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:28:39,667 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:39,674 INFO L225 Difference]: With dead ends: 6431 [2021-06-05 18:28:39,674 INFO L226 Difference]: Without dead ends: 6161 [2021-06-05 18:28:39,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 979.1ms TimeCoverageRelationStatistics Valid=1407, Invalid=4445, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:28:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6161 states. [2021-06-05 18:28:39,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6161 to 4388. [2021-06-05 18:28:39,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4388 states, 4387 states have (on average 2.7816275359015274) internal successors, (12203), 4387 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4388 states to 4388 states and 12203 transitions. [2021-06-05 18:28:39,729 INFO L78 Accepts]: Start accepts. Automaton has 4388 states and 12203 transitions. Word has length 175 [2021-06-05 18:28:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:39,730 INFO L482 AbstractCegarLoop]: Abstraction has 4388 states and 12203 transitions. [2021-06-05 18:28:39,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 4388 states and 12203 transitions. [2021-06-05 18:28:39,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:39,733 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:39,733 INFO L554 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] [2021-06-05 18:28:39,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2021-06-05 18:28:39,934 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash -569594236, now seen corresponding path program 411 times [2021-06-05 18:28:39,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:39,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265246424] [2021-06-05 18:28:39,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:40,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:40,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265246424] [2021-06-05 18:28:40,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265246424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:40,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812947192] [2021-06-05 18:28:40,301 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 [2021-06-05 18:28:40,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:40,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:40,604 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:40,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812947192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:40,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:40,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:40,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445005118] [2021-06-05 18:28:40,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:40,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:40,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:40,605 INFO L87 Difference]: Start difference. First operand 4388 states and 12203 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:41,645 INFO L93 Difference]: Finished difference Result 6456 states and 16542 transitions. [2021-06-05 18:28:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:28:41,645 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 [2021-06-05 18:28:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:41,651 INFO L225 Difference]: With dead ends: 6456 [2021-06-05 18:28:41,651 INFO L226 Difference]: Without dead ends: 6186 [2021-06-05 18:28:41,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 1140.9ms TimeCoverageRelationStatistics Valid=1435, Invalid=4727, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:28:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6186 states. [2021-06-05 18:28:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6186 to 4463. [2021-06-05 18:28:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 2.7852980726131777) internal successors, (12428), 4462 states have internal predecessors, (12428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 12428 transitions. [2021-06-05 18:28:41,704 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 12428 transitions. Word has length 175 [2021-06-05 18:28:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:41,705 INFO L482 AbstractCegarLoop]: Abstraction has 4463 states and 12428 transitions. [2021-06-05 18:28:41,705 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) [2021-06-05 18:28:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 12428 transitions. [2021-06-05 18:28:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:41,708 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:41,708 INFO L554 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] [2021-06-05 18:28:41,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2021-06-05 18:28:41,909 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash -616141166, now seen corresponding path program 412 times [2021-06-05 18:28:41,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:41,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238877705] [2021-06-05 18:28:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:42,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:42,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238877705] [2021-06-05 18:28:42,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238877705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:42,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957800306] [2021-06-05 18:28:42,248 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 [2021-06-05 18:28:42,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:42,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957800306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:42,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:42,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:42,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300921254] [2021-06-05 18:28:42,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:42,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:42,527 INFO L87 Difference]: Start difference. First operand 4463 states and 12428 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:43,485 INFO L93 Difference]: Finished difference Result 6481 states and 16667 transitions. [2021-06-05 18:28:43,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:28:43,485 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:43,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:43,491 INFO L225 Difference]: With dead ends: 6481 [2021-06-05 18:28:43,492 INFO L226 Difference]: Without dead ends: 6211 [2021-06-05 18:28:43,492 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 1005.7ms TimeCoverageRelationStatistics Valid=1481, Invalid=4681, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:28:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6211 states. [2021-06-05 18:28:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6211 to 4538. [2021-06-05 18:28:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4538 states, 4537 states have (on average 2.7888472558959667) internal successors, (12653), 4537 states have internal predecessors, (12653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4538 states to 4538 states and 12653 transitions. [2021-06-05 18:28:43,550 INFO L78 Accepts]: Start accepts. Automaton has 4538 states and 12653 transitions. Word has length 175 [2021-06-05 18:28:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:43,550 INFO L482 AbstractCegarLoop]: Abstraction has 4538 states and 12653 transitions. [2021-06-05 18:28:43,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 4538 states and 12653 transitions. [2021-06-05 18:28:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:43,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:43,554 INFO L554 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] [2021-06-05 18:28:43,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2021-06-05 18:28:43,755 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:43,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1534525566, now seen corresponding path program 413 times [2021-06-05 18:28:43,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:43,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72705464] [2021-06-05 18:28:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:44,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72705464] [2021-06-05 18:28:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72705464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763995776] [2021-06-05 18:28:44,137 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 [2021-06-05 18:28:44,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:44,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:44,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:44,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:44,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763995776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:44,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:44,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721210709] [2021-06-05 18:28:44,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:44,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:44,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:44,438 INFO L87 Difference]: Start difference. First operand 4538 states and 12653 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:45,621 INFO L93 Difference]: Finished difference Result 6506 states and 16792 transitions. [2021-06-05 18:28:45,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:28:45,622 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 [2021-06-05 18:28:45,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:45,628 INFO L225 Difference]: With dead ends: 6506 [2021-06-05 18:28:45,629 INFO L226 Difference]: Without dead ends: 6236 [2021-06-05 18:28:45,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 1186.2ms TimeCoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:28:45,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6236 states. [2021-06-05 18:28:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6236 to 4613. [2021-06-05 18:28:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.7922810060711187) internal successors, (12878), 4612 states have internal predecessors, (12878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 12878 transitions. [2021-06-05 18:28:45,686 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 12878 transitions. Word has length 175 [2021-06-05 18:28:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:45,686 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 12878 transitions. [2021-06-05 18:28:45,686 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) [2021-06-05 18:28:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 12878 transitions. [2021-06-05 18:28:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:45,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:45,690 INFO L554 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] [2021-06-05 18:28:45,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 18:28:45,891 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:45,891 INFO L82 PathProgramCache]: Analyzing trace with hash 983750928, now seen corresponding path program 414 times [2021-06-05 18:28:45,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:45,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557703026] [2021-06-05 18:28:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:46,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557703026] [2021-06-05 18:28:46,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557703026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:46,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807095725] [2021-06-05 18:28:46,232 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 [2021-06-05 18:28:46,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:46,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:46,523 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:46,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807095725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:46,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:46,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:46,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282512830] [2021-06-05 18:28:46,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:46,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:46,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=951, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:46,524 INFO L87 Difference]: Start difference. First operand 4613 states and 12878 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:47,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:47,500 INFO L93 Difference]: Finished difference Result 6531 states and 16917 transitions. [2021-06-05 18:28:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:28:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:47,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:47,506 INFO L225 Difference]: With dead ends: 6531 [2021-06-05 18:28:47,506 INFO L226 Difference]: Without dead ends: 6261 [2021-06-05 18:28:47,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1615 ImplicationChecksByTransitivity, 1051.5ms TimeCoverageRelationStatistics Valid=1571, Invalid=4909, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:28:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2021-06-05 18:28:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 4688. [2021-06-05 18:28:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4688 states, 4687 states have (on average 2.795604864518882) internal successors, (13103), 4687 states have internal predecessors, (13103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4688 states to 4688 states and 13103 transitions. [2021-06-05 18:28:47,564 INFO L78 Accepts]: Start accepts. Automaton has 4688 states and 13103 transitions. Word has length 175 [2021-06-05 18:28:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:47,564 INFO L482 AbstractCegarLoop]: Abstraction has 4688 states and 13103 transitions. [2021-06-05 18:28:47,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:47,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4688 states and 13103 transitions. [2021-06-05 18:28:47,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:47,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:47,568 INFO L554 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] [2021-06-05 18:28:47,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable422,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:47,768 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1211574784, now seen corresponding path program 415 times [2021-06-05 18:28:47,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:47,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606317451] [2021-06-05 18:28:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:48,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606317451] [2021-06-05 18:28:48,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606317451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:48,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178662856] [2021-06-05 18:28:48,128 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 [2021-06-05 18:28:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:48,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178662856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:48,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:48,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:48,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563406970] [2021-06-05 18:28:48,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:48,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:48,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:48,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:48,422 INFO L87 Difference]: Start difference. First operand 4688 states and 13103 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:49,614 INFO L93 Difference]: Finished difference Result 6556 states and 17042 transitions. [2021-06-05 18:28:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:28:49,614 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 [2021-06-05 18:28:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:49,621 INFO L225 Difference]: With dead ends: 6556 [2021-06-05 18:28:49,621 INFO L226 Difference]: Without dead ends: 6286 [2021-06-05 18:28:49,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1217.2ms TimeCoverageRelationStatistics Valid=1603, Invalid=5203, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:28:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6286 states. [2021-06-05 18:28:49,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6286 to 4763. [2021-06-05 18:28:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4763 states, 4762 states have (on average 2.7988240235195296) internal successors, (13328), 4762 states have internal predecessors, (13328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4763 states to 4763 states and 13328 transitions. [2021-06-05 18:28:49,681 INFO L78 Accepts]: Start accepts. Automaton has 4763 states and 13328 transitions. Word has length 175 [2021-06-05 18:28:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:49,682 INFO L482 AbstractCegarLoop]: Abstraction has 4763 states and 13328 transitions. [2021-06-05 18:28:49,682 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) [2021-06-05 18:28:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4763 states and 13328 transitions. [2021-06-05 18:28:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:49,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:49,714 INFO L554 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] [2021-06-05 18:28:49,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 18:28:49,915 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:49,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:49,915 INFO L82 PathProgramCache]: Analyzing trace with hash 298625294, now seen corresponding path program 416 times [2021-06-05 18:28:49,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:49,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027790226] [2021-06-05 18:28:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:50,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:50,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027790226] [2021-06-05 18:28:50,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027790226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:50,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350537819] [2021-06-05 18:28:50,246 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 [2021-06-05 18:28:50,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:28:50,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:50,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:50,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:50,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350537819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:50,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:50,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:50,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071158247] [2021-06-05 18:28:50,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:50,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:50,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:50,522 INFO L87 Difference]: Start difference. First operand 4763 states and 13328 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:51,566 INFO L93 Difference]: Finished difference Result 6581 states and 17167 transitions. [2021-06-05 18:28:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:28:51,567 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:51,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:51,574 INFO L225 Difference]: With dead ends: 6581 [2021-06-05 18:28:51,574 INFO L226 Difference]: Without dead ends: 6311 [2021-06-05 18:28:51,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1071.2ms TimeCoverageRelationStatistics Valid=1677, Invalid=5129, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:28:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-05 18:28:51,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 4838. [2021-06-05 18:28:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4838 states, 4837 states have (on average 2.8019433533181726) internal successors, (13553), 4837 states have internal predecessors, (13553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 13553 transitions. [2021-06-05 18:28:51,634 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 13553 transitions. Word has length 175 [2021-06-05 18:28:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:51,635 INFO L482 AbstractCegarLoop]: Abstraction has 4838 states and 13553 transitions. [2021-06-05 18:28:51,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 13553 transitions. [2021-06-05 18:28:51,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:51,638 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:51,639 INFO L554 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] [2021-06-05 18:28:51,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable424,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:51,839 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:51,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:51,839 INFO L82 PathProgramCache]: Analyzing trace with hash 938283518, now seen corresponding path program 417 times [2021-06-05 18:28:51,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:51,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560853380] [2021-06-05 18:28:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:52,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:52,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560853380] [2021-06-05 18:28:52,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560853380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:52,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104980785] [2021-06-05 18:28:52,182 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 [2021-06-05 18:28:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:28:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:52,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:52,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:52,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104980785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:52,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:52,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:52,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275685927] [2021-06-05 18:28:52,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:52,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:52,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:52,492 INFO L87 Difference]: Start difference. First operand 4838 states and 13553 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:53,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:53,732 INFO L93 Difference]: Finished difference Result 6606 states and 17292 transitions. [2021-06-05 18:28:53,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:28:53,732 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 [2021-06-05 18:28:53,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:53,740 INFO L225 Difference]: With dead ends: 6606 [2021-06-05 18:28:53,740 INFO L226 Difference]: Without dead ends: 6336 [2021-06-05 18:28:53,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1269.9ms TimeCoverageRelationStatistics Valid=1711, Invalid=5429, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:28:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2021-06-05 18:28:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4913. [2021-06-05 18:28:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4913 states, 4912 states have (on average 2.804967426710098) internal successors, (13778), 4912 states have internal predecessors, (13778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:53,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4913 states to 4913 states and 13778 transitions. [2021-06-05 18:28:53,809 INFO L78 Accepts]: Start accepts. Automaton has 4913 states and 13778 transitions. Word has length 175 [2021-06-05 18:28:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:53,809 INFO L482 AbstractCegarLoop]: Abstraction has 4913 states and 13778 transitions. [2021-06-05 18:28:53,809 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) [2021-06-05 18:28:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 4913 states and 13778 transitions. [2021-06-05 18:28:53,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:53,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:53,813 INFO L554 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] [2021-06-05 18:28:54,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2021-06-05 18:28:54,014 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:54,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:54,014 INFO L82 PathProgramCache]: Analyzing trace with hash 163364492, now seen corresponding path program 418 times [2021-06-05 18:28:54,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:54,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396173536] [2021-06-05 18:28:54,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:54,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:54,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396173536] [2021-06-05 18:28:54,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396173536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:54,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395625679] [2021-06-05 18:28:54,355 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 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 [2021-06-05 18:28:54,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:28:54,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:54,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:54,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395625679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:54,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:54,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:54,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855954914] [2021-06-05 18:28:54,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:54,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:54,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:54,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:54,633 INFO L87 Difference]: Start difference. First operand 4913 states and 13778 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:55,714 INFO L93 Difference]: Finished difference Result 6631 states and 17417 transitions. [2021-06-05 18:28:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:28:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:28:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:55,746 INFO L225 Difference]: With dead ends: 6631 [2021-06-05 18:28:55,746 INFO L226 Difference]: Without dead ends: 6361 [2021-06-05 18:28:55,746 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1877 ImplicationChecksByTransitivity, 1114.8ms TimeCoverageRelationStatistics Valid=1799, Invalid=5341, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:28:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6361 states. [2021-06-05 18:28:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6361 to 4988. [2021-06-05 18:28:55,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4988 states, 4987 states have (on average 2.80790054140766) internal successors, (14003), 4987 states have internal predecessors, (14003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 14003 transitions. [2021-06-05 18:28:55,806 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 14003 transitions. Word has length 175 [2021-06-05 18:28:55,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:55,806 INFO L482 AbstractCegarLoop]: Abstraction has 4988 states and 14003 transitions. [2021-06-05 18:28:55,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:55,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 14003 transitions. [2021-06-05 18:28:55,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:55,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:55,811 INFO L554 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] [2021-06-05 18:28:56,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable426,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:56,011 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:56,012 INFO L82 PathProgramCache]: Analyzing trace with hash -290548868, now seen corresponding path program 419 times [2021-06-05 18:28:56,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:56,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219087944] [2021-06-05 18:28:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:56,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:56,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219087944] [2021-06-05 18:28:56,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219087944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:56,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806718936] [2021-06-05 18:28:56,354 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 [2021-06-05 18:28:56,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:28:56,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:56,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:56,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:56,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806718936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:56,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:56,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:28:56,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854084665] [2021-06-05 18:28:56,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:28:56,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:56,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:28:56,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:28:56,652 INFO L87 Difference]: Start difference. First operand 4988 states and 14003 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:28:57,942 INFO L93 Difference]: Finished difference Result 6656 states and 17542 transitions. [2021-06-05 18:28:57,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:28:57,943 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 [2021-06-05 18:28:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:28:57,950 INFO L225 Difference]: With dead ends: 6656 [2021-06-05 18:28:57,950 INFO L226 Difference]: Without dead ends: 6386 [2021-06-05 18:28:57,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1307.5ms TimeCoverageRelationStatistics Valid=1835, Invalid=5647, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:28:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2021-06-05 18:28:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 5063. [2021-06-05 18:28:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5063 states, 5062 states have (on average 2.8107467404188067) internal successors, (14228), 5062 states have internal predecessors, (14228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:28:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 14228 transitions. [2021-06-05 18:28:58,014 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 14228 transitions. Word has length 175 [2021-06-05 18:28:58,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:28:58,014 INFO L482 AbstractCegarLoop]: Abstraction has 5063 states and 14228 transitions. [2021-06-05 18:28:58,014 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) [2021-06-05 18:28:58,014 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 14228 transitions. [2021-06-05 18:28:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:28:58,018 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:28:58,018 INFO L554 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] [2021-06-05 18:28:58,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:28:58,219 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:28:58,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:28:58,219 INFO L82 PathProgramCache]: Analyzing trace with hash 587463050, now seen corresponding path program 420 times [2021-06-05 18:28:58,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:28:58,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571736829] [2021-06-05 18:28:58,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:28:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:28:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:58,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:28:58,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571736829] [2021-06-05 18:28:58,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571736829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:58,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794928658] [2021-06-05 18:28:58,553 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 [2021-06-05 18:28:58,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:28:58,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:28:58,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:28:58,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:28:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:28:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794928658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:28:58,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:28:58,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:28:58,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053260749] [2021-06-05 18:28:58,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:28:58,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:28:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:28:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:28:58,927 INFO L87 Difference]: Start difference. First operand 5063 states and 14228 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:00,062 INFO L93 Difference]: Finished difference Result 6681 states and 17667 transitions. [2021-06-05 18:29:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:29:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:00,070 INFO L225 Difference]: With dead ends: 6681 [2021-06-05 18:29:00,070 INFO L226 Difference]: Without dead ends: 6411 [2021-06-05 18:29:00,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1149.0ms TimeCoverageRelationStatistics Valid=1937, Invalid=5545, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:29:00,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6411 states. [2021-06-05 18:29:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6411 to 5138. [2021-06-05 18:29:00,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5138 states, 5137 states have (on average 2.813509830640452) internal successors, (14453), 5137 states have internal predecessors, (14453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5138 states to 5138 states and 14453 transitions. [2021-06-05 18:29:00,137 INFO L78 Accepts]: Start accepts. Automaton has 5138 states and 14453 transitions. Word has length 175 [2021-06-05 18:29:00,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:00,137 INFO L482 AbstractCegarLoop]: Abstraction has 5138 states and 14453 transitions. [2021-06-05 18:29:00,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 5138 states and 14453 transitions. [2021-06-05 18:29:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:00,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:00,141 INFO L554 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] [2021-06-05 18:29:00,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:00,342 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -312591750, now seen corresponding path program 421 times [2021-06-05 18:29:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:00,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902511473] [2021-06-05 18:29:00,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:00,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:00,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902511473] [2021-06-05 18:29:00,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902511473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:00,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110076452] [2021-06-05 18:29:00,680 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 [2021-06-05 18:29:00,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:00,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:00,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:00,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110076452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:00,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:00,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:00,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67861868] [2021-06-05 18:29:00,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:00,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:00,963 INFO L87 Difference]: Start difference. First operand 5138 states and 14453 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:02,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:02,325 INFO L93 Difference]: Finished difference Result 6706 states and 17792 transitions. [2021-06-05 18:29:02,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:29:02,325 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 [2021-06-05 18:29:02,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:02,331 INFO L225 Difference]: With dead ends: 6706 [2021-06-05 18:29:02,332 INFO L226 Difference]: Without dead ends: 6436 [2021-06-05 18:29:02,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2060 ImplicationChecksByTransitivity, 1373.4ms TimeCoverageRelationStatistics Valid=1975, Invalid=5857, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:29:02,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6436 states. [2021-06-05 18:29:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6436 to 5213. [2021-06-05 18:29:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5213 states, 5212 states have (on average 2.816193399846508) internal successors, (14678), 5212 states have internal predecessors, (14678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:02,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5213 states to 5213 states and 14678 transitions. [2021-06-05 18:29:02,394 INFO L78 Accepts]: Start accepts. Automaton has 5213 states and 14678 transitions. Word has length 175 [2021-06-05 18:29:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:02,394 INFO L482 AbstractCegarLoop]: Abstraction has 5213 states and 14678 transitions. [2021-06-05 18:29:02,394 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) [2021-06-05 18:29:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 5213 states and 14678 transitions. [2021-06-05 18:29:02,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:02,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:02,399 INFO L554 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] [2021-06-05 18:29:02,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:02,599 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash -741656056, now seen corresponding path program 422 times [2021-06-05 18:29:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:02,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410019624] [2021-06-05 18:29:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:02,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410019624] [2021-06-05 18:29:02,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410019624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:02,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835595093] [2021-06-05 18:29:02,927 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 [2021-06-05 18:29:02,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:02,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:02,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:03,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835595093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:03,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:03,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:29:03,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195491318] [2021-06-05 18:29:03,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:03,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:03,198 INFO L87 Difference]: Start difference. First operand 5213 states and 14678 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:04,379 INFO L93 Difference]: Finished difference Result 6731 states and 17917 transitions. [2021-06-05 18:29:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:29:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:04,386 INFO L225 Difference]: With dead ends: 6731 [2021-06-05 18:29:04,387 INFO L226 Difference]: Without dead ends: 6461 [2021-06-05 18:29:04,387 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1179.7ms TimeCoverageRelationStatistics Valid=2091, Invalid=5741, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:29:04,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-06-05 18:29:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5288. [2021-06-05 18:29:04,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 2.818800832229998) internal successors, (14903), 5287 states have internal predecessors, (14903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 14903 transitions. [2021-06-05 18:29:04,492 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 14903 transitions. Word has length 175 [2021-06-05 18:29:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 5288 states and 14903 transitions. [2021-06-05 18:29:04,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 14903 transitions. [2021-06-05 18:29:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:04,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:04,496 INFO L554 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] [2021-06-05 18:29:04,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable430,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:04,697 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1427839240, now seen corresponding path program 423 times [2021-06-05 18:29:04,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:04,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088952866] [2021-06-05 18:29:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:05,030 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:05,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088952866] [2021-06-05 18:29:05,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088952866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:05,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030178264] [2021-06-05 18:29:05,030 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 [2021-06-05 18:29:05,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:05,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:05,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:05,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:05,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030178264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:05,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:05,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:05,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271026018] [2021-06-05 18:29:05,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:05,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:05,331 INFO L87 Difference]: Start difference. First operand 5288 states and 14903 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:06,753 INFO L93 Difference]: Finished difference Result 6756 states and 18042 transitions. [2021-06-05 18:29:06,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:29:06,753 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 [2021-06-05 18:29:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:06,761 INFO L225 Difference]: With dead ends: 6756 [2021-06-05 18:29:06,761 INFO L226 Difference]: Without dead ends: 6486 [2021-06-05 18:29:06,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2204 ImplicationChecksByTransitivity, 1403.4ms TimeCoverageRelationStatistics Valid=2131, Invalid=6059, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:29:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6486 states. [2021-06-05 18:29:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6486 to 5363. [2021-06-05 18:29:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5363 states, 5362 states have (on average 2.8213353226408056) internal successors, (15128), 5362 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5363 states to 5363 states and 15128 transitions. [2021-06-05 18:29:06,832 INFO L78 Accepts]: Start accepts. Automaton has 5363 states and 15128 transitions. Word has length 175 [2021-06-05 18:29:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:06,832 INFO L482 AbstractCegarLoop]: Abstraction has 5363 states and 15128 transitions. [2021-06-05 18:29:06,832 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) [2021-06-05 18:29:06,832 INFO L276 IsEmpty]: Start isEmpty. Operand 5363 states and 15128 transitions. [2021-06-05 18:29:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:06,836 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:06,836 INFO L554 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] [2021-06-05 18:29:07,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-06-05 18:29:07,037 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:07,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1512873978, now seen corresponding path program 424 times [2021-06-05 18:29:07,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:07,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425729233] [2021-06-05 18:29:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:07,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:07,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:07,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425729233] [2021-06-05 18:29:07,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425729233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:07,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969647064] [2021-06-05 18:29:07,368 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 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 [2021-06-05 18:29:07,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:07,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:07,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:07,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:07,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969647064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:07,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:07,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:29:07,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105872791] [2021-06-05 18:29:07,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:07,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:07,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:07,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:07,666 INFO L87 Difference]: Start difference. First operand 5363 states and 15128 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:08,887 INFO L93 Difference]: Finished difference Result 6781 states and 18167 transitions. [2021-06-05 18:29:08,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:29:08,887 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:08,894 INFO L225 Difference]: With dead ends: 6781 [2021-06-05 18:29:08,894 INFO L226 Difference]: Without dead ends: 6511 [2021-06-05 18:29:08,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 1211.1ms TimeCoverageRelationStatistics Valid=2261, Invalid=5929, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:29:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6511 states. [2021-06-05 18:29:08,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6511 to 5438. [2021-06-05 18:29:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5438 states, 5437 states have (on average 2.823799889645025) internal successors, (15353), 5437 states have internal predecessors, (15353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 15353 transitions. [2021-06-05 18:29:08,966 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 15353 transitions. Word has length 175 [2021-06-05 18:29:08,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:08,966 INFO L482 AbstractCegarLoop]: Abstraction has 5438 states and 15353 transitions. [2021-06-05 18:29:08,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:08,966 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 15353 transitions. [2021-06-05 18:29:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:08,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:08,971 INFO L554 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] [2021-06-05 18:29:09,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 18:29:09,171 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:09,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1581025034, now seen corresponding path program 425 times [2021-06-05 18:29:09,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:09,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65718383] [2021-06-05 18:29:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:09,508 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:09,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:09,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65718383] [2021-06-05 18:29:09,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65718383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:09,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858704375] [2021-06-05 18:29:09,508 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 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 [2021-06-05 18:29:09,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-05 18:29:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:09,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858704375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:09,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:09,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130880935] [2021-06-05 18:29:09,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:09,800 INFO L87 Difference]: Start difference. First operand 5438 states and 15353 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:11,291 INFO L93 Difference]: Finished difference Result 6806 states and 18292 transitions. [2021-06-05 18:29:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:29:11,291 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 [2021-06-05 18:29:11,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:11,298 INFO L225 Difference]: With dead ends: 6806 [2021-06-05 18:29:11,298 INFO L226 Difference]: Without dead ends: 6536 [2021-06-05 18:29:11,298 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 1448.9ms TimeCoverageRelationStatistics Valid=2303, Invalid=6253, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:29:11,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6536 states. [2021-06-05 18:29:11,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6536 to 5513. [2021-06-05 18:29:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 2.826197387518142) internal successors, (15578), 5512 states have internal predecessors, (15578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 15578 transitions. [2021-06-05 18:29:11,367 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 15578 transitions. Word has length 175 [2021-06-05 18:29:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:11,367 INFO L482 AbstractCegarLoop]: Abstraction has 5513 states and 15578 transitions. [2021-06-05 18:29:11,367 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) [2021-06-05 18:29:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 15578 transitions. [2021-06-05 18:29:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:11,372 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:11,372 INFO L554 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] [2021-06-05 18:29:11,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 18:29:11,573 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1416973188, now seen corresponding path program 426 times [2021-06-05 18:29:11,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:11,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146752842] [2021-06-05 18:29:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:11,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:11,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146752842] [2021-06-05 18:29:11,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146752842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:11,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804919307] [2021-06-05 18:29:11,903 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 [2021-06-05 18:29:11,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-05 18:29:11,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:11,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:11,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:12,181 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:12,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804919307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:12,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:12,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:29:12,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370739325] [2021-06-05 18:29:12,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:12,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:12,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:12,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:12,182 INFO L87 Difference]: Start difference. First operand 5513 states and 15578 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:13,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:13,466 INFO L93 Difference]: Finished difference Result 6831 states and 18417 transitions. [2021-06-05 18:29:13,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:29:13,467 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:13,473 INFO L225 Difference]: With dead ends: 6831 [2021-06-05 18:29:13,473 INFO L226 Difference]: Without dead ends: 6561 [2021-06-05 18:29:13,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 1274.6ms TimeCoverageRelationStatistics Valid=2447, Invalid=6109, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:29:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6561 states. [2021-06-05 18:29:13,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6561 to 5588. [2021-06-05 18:29:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5588 states, 5587 states have (on average 2.828530517272239) internal successors, (15803), 5587 states have internal predecessors, (15803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5588 states to 5588 states and 15803 transitions. [2021-06-05 18:29:13,535 INFO L78 Accepts]: Start accepts. Automaton has 5588 states and 15803 transitions. Word has length 175 [2021-06-05 18:29:13,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:13,536 INFO L482 AbstractCegarLoop]: Abstraction has 5588 states and 15803 transitions. [2021-06-05 18:29:13,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:13,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5588 states and 15803 transitions. [2021-06-05 18:29:13,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:13,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:13,540 INFO L554 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] [2021-06-05 18:29:13,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable434,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:13,741 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1846726772, now seen corresponding path program 427 times [2021-06-05 18:29:13,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:13,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107563141] [2021-06-05 18:29:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:14,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:14,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107563141] [2021-06-05 18:29:14,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107563141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:14,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787299201] [2021-06-05 18:29:14,071 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 [2021-06-05 18:29:14,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:14,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:14,349 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:14,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787299201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:14,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:14,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-06-05 18:29:14,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905864884] [2021-06-05 18:29:14,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:14,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:14,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:14,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:14,350 INFO L87 Difference]: Start difference. First operand 5588 states and 15803 transitions. Second operand has 35 states, 35 states have (on average 5.057142857142857) internal successors, (177), 35 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:15,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:15,900 INFO L93 Difference]: Finished difference Result 6916 states and 18707 transitions. [2021-06-05 18:29:15,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:29:15,901 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 [2021-06-05 18:29:15,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:15,908 INFO L225 Difference]: With dead ends: 6916 [2021-06-05 18:29:15,909 INFO L226 Difference]: Without dead ends: 6646 [2021-06-05 18:29:15,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 1510.5ms TimeCoverageRelationStatistics Valid=2491, Invalid=6439, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:29:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6646 states. [2021-06-05 18:29:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6646 to 5663. [2021-06-05 18:29:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5663 states, 5662 states have (on average 2.834334157541505) internal successors, (16048), 5662 states have internal predecessors, (16048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5663 states to 5663 states and 16048 transitions. [2021-06-05 18:29:15,982 INFO L78 Accepts]: Start accepts. Automaton has 5663 states and 16048 transitions. Word has length 175 [2021-06-05 18:29:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:15,982 INFO L482 AbstractCegarLoop]: Abstraction has 5663 states and 16048 transitions. [2021-06-05 18:29:15,983 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) [2021-06-05 18:29:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 5663 states and 16048 transitions. [2021-06-05 18:29:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:15,987 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:15,987 INFO L554 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] [2021-06-05 18:29:16,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-06-05 18:29:16,188 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1788992642, now seen corresponding path program 428 times [2021-06-05 18:29:16,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:16,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928338673] [2021-06-05 18:29:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:16,553 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:16,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:16,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928338673] [2021-06-05 18:29:16,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928338673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:16,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285353746] [2021-06-05 18:29:16,553 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 [2021-06-05 18:29:16,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:16,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:16,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285353746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:16,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:16,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-06-05 18:29:16,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848962601] [2021-06-05 18:29:16,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-05 18:29:16,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-05 18:29:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:29:16,820 INFO L87 Difference]: Start difference. First operand 5663 states and 16048 transitions. Second operand has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:18,130 INFO L93 Difference]: Finished difference Result 7658 states and 20831 transitions. [2021-06-05 18:29:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:29:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:18,139 INFO L225 Difference]: With dead ends: 7658 [2021-06-05 18:29:18,139 INFO L226 Difference]: Without dead ends: 7388 [2021-06-05 18:29:18,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 1331.0ms TimeCoverageRelationStatistics Valid=2650, Invalid=6280, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:29:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7388 states. [2021-06-05 18:29:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7388 to 5843. [2021-06-05 18:29:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 5842 states have (on average 2.842690859294762) internal successors, (16607), 5842 states have internal predecessors, (16607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 16607 transitions. [2021-06-05 18:29:18,210 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 16607 transitions. Word has length 175 [2021-06-05 18:29:18,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:18,210 INFO L482 AbstractCegarLoop]: Abstraction has 5843 states and 16607 transitions. [2021-06-05 18:29:18,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.147058823529412) internal successors, (175), 34 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 16607 transitions. [2021-06-05 18:29:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-06-05 18:29:18,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:18,215 INFO L554 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] [2021-06-05 18:29:18,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 18:29:18,416 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:18,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:18,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1811335892, now seen corresponding path program 429 times [2021-06-05 18:29:18,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:18,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261891156] [2021-06-05 18:29:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:18,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:18,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261891156] [2021-06-05 18:29:18,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261891156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:18,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493470617] [2021-06-05 18:29:18,763 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 [2021-06-05 18:29:18,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-05 18:29:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:29:18,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 0 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:19,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493470617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:19,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:19,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 36 [2021-06-05 18:29:19,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806340114] [2021-06-05 18:29:19,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:19,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:19,077 INFO L87 Difference]: Start difference. First operand 5843 states and 16607 transitions. Second operand has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:20,736 INFO L93 Difference]: Finished difference Result 7526 states and 20496 transitions. [2021-06-05 18:29:20,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:29:20,736 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-06-05 18:29:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:20,744 INFO L225 Difference]: With dead ends: 7526 [2021-06-05 18:29:20,744 INFO L226 Difference]: Without dead ends: 6951 [2021-06-05 18:29:20,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 1647.0ms TimeCoverageRelationStatistics Valid=2786, Invalid=7314, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:29:20,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-05 18:29:20,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5878. [2021-06-05 18:29:20,800 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) [2021-06-05 18:29:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16683 transitions. [2021-06-05 18:29:20,809 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16683 transitions. Word has length 175 [2021-06-05 18:29:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:20,809 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16683 transitions. [2021-06-05 18:29:20,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 4.944444444444445) internal successors, (178), 36 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16683 transitions. [2021-06-05 18:29:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:20,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:20,815 INFO L554 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] [2021-06-05 18:29:21,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable437 [2021-06-05 18:29:21,015 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:21,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:21,015 INFO L82 PathProgramCache]: Analyzing trace with hash -359446824, now seen corresponding path program 430 times [2021-06-05 18:29:21,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:21,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483497740] [2021-06-05 18:29:21,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:21,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483497740] [2021-06-05 18:29:21,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483497740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:21,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580518483] [2021-06-05 18:29:21,430 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 [2021-06-05 18:29:21,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:21,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:29:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:21,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580518483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:21,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:21,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 38 [2021-06-05 18:29:21,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725972779] [2021-06-05 18:29:21,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:29:21,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:21,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:29:21,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1088, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:29:21,766 INFO L87 Difference]: Start difference. First operand 5878 states and 16683 transitions. Second operand has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:22,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:22,610 INFO L93 Difference]: Finished difference Result 7268 states and 19783 transitions. [2021-06-05 18:29:22,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:29:22,610 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:22,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:22,617 INFO L225 Difference]: With dead ends: 7268 [2021-06-05 18:29:22,618 INFO L226 Difference]: Without dead ends: 6934 [2021-06-05 18:29:22,618 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 1015.2ms TimeCoverageRelationStatistics Valid=1485, Invalid=3917, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:29:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-06-05 18:29:22,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5963. [2021-06-05 18:29:22,677 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) [2021-06-05 18:29:22,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5963 states to 5963 states and 16853 transitions. [2021-06-05 18:29:22,686 INFO L78 Accepts]: Start accepts. Automaton has 5963 states and 16853 transitions. Word has length 180 [2021-06-05 18:29:22,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:22,687 INFO L482 AbstractCegarLoop]: Abstraction has 5963 states and 16853 transitions. [2021-06-05 18:29:22,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 38 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:22,687 INFO L276 IsEmpty]: Start isEmpty. Operand 5963 states and 16853 transitions. [2021-06-05 18:29:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:22,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:22,692 INFO L554 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] [2021-06-05 18:29:22,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:22,892 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1425719172, now seen corresponding path program 431 times [2021-06-05 18:29:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:22,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893582258] [2021-06-05 18:29:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:23,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893582258] [2021-06-05 18:29:23,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893582258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:23,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179037001] [2021-06-05 18:29:23,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:29:23,395 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:29:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:23,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179037001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:23,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:23,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:23,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004912663] [2021-06-05 18:29:23,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:23,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:23,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:23,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:23,619 INFO L87 Difference]: Start difference. First operand 5963 states and 16853 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:24,331 INFO L93 Difference]: Finished difference Result 8561 states and 22177 transitions. [2021-06-05 18:29:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:29:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:24,340 INFO L225 Difference]: With dead ends: 8561 [2021-06-05 18:29:24,340 INFO L226 Difference]: Without dead ends: 8291 [2021-06-05 18:29:24,341 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 914.6ms TimeCoverageRelationStatistics Valid=1286, Invalid=3270, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:29:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8291 states. [2021-06-05 18:29:24,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8291 to 5978. [2021-06-05 18:29:24,404 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) [2021-06-05 18:29:24,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:24,413 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:24,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:24,413 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:24,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:24,413 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:24,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:24,418 INFO L554 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] [2021-06-05 18:29:24,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2021-06-05 18:29:24,618 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:24,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1305889132, now seen corresponding path program 432 times [2021-06-05 18:29:24,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265889950] [2021-06-05 18:29:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:25,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265889950] [2021-06-05 18:29:25,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265889950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:25,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950196456] [2021-06-05 18:29:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:29:25,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:29:25,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:25,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:25,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950196456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:25,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:25,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:25,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649395364] [2021-06-05 18:29:25,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:25,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:25,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:25,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:25,424 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) [2021-06-05 18:29:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:26,212 INFO L93 Difference]: Finished difference Result 8446 states and 21947 transitions. [2021-06-05 18:29:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:29:26,213 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 [2021-06-05 18:29:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:26,222 INFO L225 Difference]: With dead ends: 8446 [2021-06-05 18:29:26,222 INFO L226 Difference]: Without dead ends: 8176 [2021-06-05 18:29:26,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1007.2ms TimeCoverageRelationStatistics Valid=1373, Invalid=3739, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:29:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-05 18:29:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 5978. [2021-06-05 18:29:26,284 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) [2021-06-05 18:29:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:26,293 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:26,294 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:26,294 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) [2021-06-05 18:29:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:26,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:26,299 INFO L554 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] [2021-06-05 18:29:26,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:26,499 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1296324102, now seen corresponding path program 433 times [2021-06-05 18:29:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:26,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253404194] [2021-06-05 18:29:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:26,914 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:26,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:26,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253404194] [2021-06-05 18:29:26,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253404194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:26,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450776813] [2021-06-05 18:29:26,914 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 [2021-06-05 18:29:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:26,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:26,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450776813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:27,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:27,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471525591] [2021-06-05 18:29:27,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:27,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:27,205 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:27,978 INFO L93 Difference]: Finished difference Result 8421 states and 21897 transitions. [2021-06-05 18:29:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:29:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:27,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:27,985 INFO L225 Difference]: With dead ends: 8421 [2021-06-05 18:29:27,985 INFO L226 Difference]: Without dead ends: 8151 [2021-06-05 18:29:27,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 955.9ms TimeCoverageRelationStatistics Valid=1281, Invalid=3549, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:29:27,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2021-06-05 18:29:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 5978. [2021-06-05 18:29:28,042 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) [2021-06-05 18:29:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:28,051 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:28,051 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:28,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:28,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:28,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:28,056 INFO L554 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] [2021-06-05 18:29:28,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-05 18:29:28,256 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:28,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2057707242, now seen corresponding path program 434 times [2021-06-05 18:29:28,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:28,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140239680] [2021-06-05 18:29:28,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:28,691 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:28,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140239680] [2021-06-05 18:29:28,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140239680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:28,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705185470] [2021-06-05 18:29:28,692 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 [2021-06-05 18:29:28,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:28,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:28,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:29,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705185470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:29,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:29,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:29,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809008167] [2021-06-05 18:29:29,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:29,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:29,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:29,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:29,004 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) [2021-06-05 18:29:29,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:29,873 INFO L93 Difference]: Finished difference Result 8371 states and 21797 transitions. [2021-06-05 18:29:29,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:29:29,873 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 [2021-06-05 18:29:29,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:29,882 INFO L225 Difference]: With dead ends: 8371 [2021-06-05 18:29:29,882 INFO L226 Difference]: Without dead ends: 8101 [2021-06-05 18:29:29,883 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1052.1ms TimeCoverageRelationStatistics Valid=1376, Invalid=4026, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:29:29,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8101 states. [2021-06-05 18:29:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8101 to 5978. [2021-06-05 18:29:29,943 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) [2021-06-05 18:29:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:29,952 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:29,952 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:29,952 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) [2021-06-05 18:29:29,952 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:29,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:29,957 INFO L554 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] [2021-06-05 18:29:30,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-05 18:29:30,158 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:30,158 INFO L82 PathProgramCache]: Analyzing trace with hash -605931272, now seen corresponding path program 435 times [2021-06-05 18:29:30,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:30,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326646689] [2021-06-05 18:29:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:30,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:30,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326646689] [2021-06-05 18:29:30,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326646689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827963307] [2021-06-05 18:29:30,559 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 [2021-06-05 18:29:30,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:29:30,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:30,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:30,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:30,897 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:30,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827963307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:30,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:30,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:30,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986013801] [2021-06-05 18:29:30,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:30,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:30,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:30,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:30,898 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:31,767 INFO L93 Difference]: Finished difference Result 8321 states and 21697 transitions. [2021-06-05 18:29:31,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:29:31,767 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:31,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:31,776 INFO L225 Difference]: With dead ends: 8321 [2021-06-05 18:29:31,776 INFO L226 Difference]: Without dead ends: 8051 [2021-06-05 18:29:31,777 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=1292, Invalid=3820, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:29:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8051 states. [2021-06-05 18:29:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8051 to 5978. [2021-06-05 18:29:31,839 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) [2021-06-05 18:29:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:31,848 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:31,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:31,848 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:31,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:31,848 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:31,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:31,853 INFO L554 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] [2021-06-05 18:29:32,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-05 18:29:32,053 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:32,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:32,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1451419160, now seen corresponding path program 436 times [2021-06-05 18:29:32,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:32,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881849899] [2021-06-05 18:29:32,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:32,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:32,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:32,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881849899] [2021-06-05 18:29:32,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881849899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:32,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069223836] [2021-06-05 18:29:32,489 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 [2021-06-05 18:29:32,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:32,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:32,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:32,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:32,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069223836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:32,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:32,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:32,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562479595] [2021-06-05 18:29:32,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:32,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:32,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:32,800 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) [2021-06-05 18:29:33,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:33,797 INFO L93 Difference]: Finished difference Result 8271 states and 21597 transitions. [2021-06-05 18:29:33,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:29:33,797 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 [2021-06-05 18:29:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:33,805 INFO L225 Difference]: With dead ends: 8271 [2021-06-05 18:29:33,805 INFO L226 Difference]: Without dead ends: 8001 [2021-06-05 18:29:33,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1121.4ms TimeCoverageRelationStatistics Valid=1395, Invalid=4305, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:29:33,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8001 states. [2021-06-05 18:29:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8001 to 5978. [2021-06-05 18:29:33,864 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) [2021-06-05 18:29:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:33,873 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:33,874 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:33,874 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) [2021-06-05 18:29:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:33,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:33,879 INFO L554 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] [2021-06-05 18:29:34,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 18:29:34,079 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:34,079 INFO L82 PathProgramCache]: Analyzing trace with hash 937545078, now seen corresponding path program 437 times [2021-06-05 18:29:34,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:34,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497303480] [2021-06-05 18:29:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:34,497 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:34,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497303480] [2021-06-05 18:29:34,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497303480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:34,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572505749] [2021-06-05 18:29:34,498 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 [2021-06-05 18:29:34,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:29:34,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:34,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:34,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572505749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:34,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:34,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:34,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797330225] [2021-06-05 18:29:34,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:34,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:34,799 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:35,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:35,711 INFO L93 Difference]: Finished difference Result 8221 states and 21497 transitions. [2021-06-05 18:29:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:29:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:35,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:35,720 INFO L225 Difference]: With dead ends: 8221 [2021-06-05 18:29:35,721 INFO L226 Difference]: Without dead ends: 7951 [2021-06-05 18:29:35,721 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=1319, Invalid=4083, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 18:29:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-05 18:29:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 5978. [2021-06-05 18:29:35,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:35,791 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:35,791 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:35,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:35,796 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:35,796 INFO L554 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] [2021-06-05 18:29:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-06-05 18:29:36,013 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1820596838, now seen corresponding path program 438 times [2021-06-05 18:29:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313352146] [2021-06-05 18:29:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:36,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:36,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313352146] [2021-06-05 18:29:36,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313352146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:36,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455675677] [2021-06-05 18:29:36,417 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 [2021-06-05 18:29:36,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:29:36,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:36,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:36,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:36,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455675677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:36,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:36,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119078] [2021-06-05 18:29:36,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:36,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:36,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:36,765 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) [2021-06-05 18:29:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:37,757 INFO L93 Difference]: Finished difference Result 8171 states and 21397 transitions. [2021-06-05 18:29:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:29:37,758 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 [2021-06-05 18:29:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:37,767 INFO L225 Difference]: With dead ends: 8171 [2021-06-05 18:29:37,767 INFO L226 Difference]: Without dead ends: 7901 [2021-06-05 18:29:37,767 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 1135.3ms TimeCoverageRelationStatistics Valid=1430, Invalid=4576, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:29:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7901 states. [2021-06-05 18:29:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7901 to 5978. [2021-06-05 18:29:37,831 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) [2021-06-05 18:29:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:37,840 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:37,840 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:37,840 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) [2021-06-05 18:29:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:37,846 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:37,846 INFO L554 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] [2021-06-05 18:29:38,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:38,046 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash -71612556, now seen corresponding path program 439 times [2021-06-05 18:29:38,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:38,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855339213] [2021-06-05 18:29:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:38,426 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:38,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:38,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855339213] [2021-06-05 18:29:38,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855339213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:38,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337641971] [2021-06-05 18:29:38,427 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 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 [2021-06-05 18:29:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:38,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337641971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:38,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:38,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:38,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733815497] [2021-06-05 18:29:38,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:38,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:38,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:38,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:38,724 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:39,701 INFO L93 Difference]: Finished difference Result 8121 states and 21297 transitions. [2021-06-05 18:29:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:29:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:39,710 INFO L225 Difference]: With dead ends: 8121 [2021-06-05 18:29:39,710 INFO L226 Difference]: Without dead ends: 7851 [2021-06-05 18:29:39,710 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1038.0ms TimeCoverageRelationStatistics Valid=1362, Invalid=4338, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 18:29:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7851 states. [2021-06-05 18:29:39,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7851 to 5978. [2021-06-05 18:29:39,770 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) [2021-06-05 18:29:39,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:39,779 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:39,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:39,779 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:39,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:39,779 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:39,784 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:39,784 INFO L554 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] [2021-06-05 18:29:39,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable447 [2021-06-05 18:29:39,985 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1769734244, now seen corresponding path program 440 times [2021-06-05 18:29:39,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:39,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083008797] [2021-06-05 18:29:39,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:40,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:40,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083008797] [2021-06-05 18:29:40,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083008797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:40,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229452129] [2021-06-05 18:29:40,376 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 [2021-06-05 18:29:40,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:40,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:40,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229452129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:40,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:40,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102674882] [2021-06-05 18:29:40,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:40,687 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) [2021-06-05 18:29:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:41,816 INFO L93 Difference]: Finished difference Result 8071 states and 21197 transitions. [2021-06-05 18:29:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:29:41,817 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 [2021-06-05 18:29:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:41,825 INFO L225 Difference]: With dead ends: 8071 [2021-06-05 18:29:41,825 INFO L226 Difference]: Without dead ends: 7801 [2021-06-05 18:29:41,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 1177.1ms TimeCoverageRelationStatistics Valid=1481, Invalid=4839, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:29:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-06-05 18:29:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5978. [2021-06-05 18:29:41,885 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) [2021-06-05 18:29:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:41,894 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:41,894 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:41,894 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) [2021-06-05 18:29:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:41,899 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:41,899 INFO L554 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] [2021-06-05 18:29:42,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 18:29:42,100 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1643673870, now seen corresponding path program 441 times [2021-06-05 18:29:42,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:42,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092081158] [2021-06-05 18:29:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:42,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092081158] [2021-06-05 18:29:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092081158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072911355] [2021-06-05 18:29:42,504 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 [2021-06-05 18:29:42,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:29:42,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:42,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:42,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:42,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072911355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:42,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:42,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:42,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560348322] [2021-06-05 18:29:42,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:42,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:42,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:42,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:42,809 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:43,770 INFO L93 Difference]: Finished difference Result 8021 states and 21097 transitions. [2021-06-05 18:29:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:29:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:43,779 INFO L225 Difference]: With dead ends: 8021 [2021-06-05 18:29:43,779 INFO L226 Difference]: Without dead ends: 7751 [2021-06-05 18:29:43,780 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 1080.4ms TimeCoverageRelationStatistics Valid=1421, Invalid=4585, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 18:29:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7751 states. [2021-06-05 18:29:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7751 to 5978. [2021-06-05 18:29:43,840 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) [2021-06-05 18:29:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:43,849 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:43,849 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:43,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:43,854 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:43,854 INFO L554 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] [2021-06-05 18:29:44,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-06-05 18:29:44,055 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919010, now seen corresponding path program 442 times [2021-06-05 18:29:44,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:44,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606523915] [2021-06-05 18:29:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:44,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:44,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606523915] [2021-06-05 18:29:44,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606523915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:44,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061715522] [2021-06-05 18:29:44,443 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 [2021-06-05 18:29:44,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:44,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:44,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:44,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:44,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061715522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:44,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:44,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:44,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166033673] [2021-06-05 18:29:44,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:44,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:44,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:44,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:44,751 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) [2021-06-05 18:29:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:45,909 INFO L93 Difference]: Finished difference Result 7971 states and 20997 transitions. [2021-06-05 18:29:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:29:45,910 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 [2021-06-05 18:29:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:45,918 INFO L225 Difference]: With dead ends: 7971 [2021-06-05 18:29:45,918 INFO L226 Difference]: Without dead ends: 7701 [2021-06-05 18:29:45,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1246.8ms TimeCoverageRelationStatistics Valid=1548, Invalid=5094, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:45,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7701 states. [2021-06-05 18:29:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7701 to 5978. [2021-06-05 18:29:45,979 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) [2021-06-05 18:29:45,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:45,988 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:45,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:45,988 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:45,988 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) [2021-06-05 18:29:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:45,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:45,993 INFO L554 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] [2021-06-05 18:29:46,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:46,194 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:46,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1962372080, now seen corresponding path program 443 times [2021-06-05 18:29:46,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:46,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771936965] [2021-06-05 18:29:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:46,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:46,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771936965] [2021-06-05 18:29:46,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771936965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:46,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535815275] [2021-06-05 18:29:46,561 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 [2021-06-05 18:29:46,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:29:46,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:46,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:46,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535815275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:46,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:46,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:46,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162233365] [2021-06-05 18:29:46,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:46,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:46,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:46,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:46,850 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:47,859 INFO L93 Difference]: Finished difference Result 7921 states and 20897 transitions. [2021-06-05 18:29:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:29:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:47,868 INFO L225 Difference]: With dead ends: 7921 [2021-06-05 18:29:47,868 INFO L226 Difference]: Without dead ends: 7651 [2021-06-05 18:29:47,869 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1085.4ms TimeCoverageRelationStatistics Valid=1496, Invalid=4824, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 18:29:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-06-05 18:29:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 5978. [2021-06-05 18:29:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.824661201271541) internal successors, (16883), 5977 states have internal predecessors, (16883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:47,957 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:47,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:47,958 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:47,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:47,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:47,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:47,963 INFO L554 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] [2021-06-05 18:29:48,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:48,178 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:48,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:48,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1043987680, now seen corresponding path program 444 times [2021-06-05 18:29:48,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:48,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801601932] [2021-06-05 18:29:48,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:48,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:48,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801601932] [2021-06-05 18:29:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801601932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:48,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029350618] [2021-06-05 18:29:48,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:29:48,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:29:48,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:48,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029350618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:48,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:48,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:48,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987278962] [2021-06-05 18:29:48,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:48,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:48,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:48,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:48,893 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) [2021-06-05 18:29:50,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:50,086 INFO L93 Difference]: Finished difference Result 7871 states and 20797 transitions. [2021-06-05 18:29:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:29:50,087 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 [2021-06-05 18:29:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:50,095 INFO L225 Difference]: With dead ends: 7871 [2021-06-05 18:29:50,095 INFO L226 Difference]: Without dead ends: 7601 [2021-06-05 18:29:50,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 1300.9ms TimeCoverageRelationStatistics Valid=1631, Invalid=5341, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7601 states. [2021-06-05 18:29:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7601 to 5978. [2021-06-05 18:29:50,157 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) [2021-06-05 18:29:50,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:50,166 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:50,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:50,166 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:50,166 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) [2021-06-05 18:29:50,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:50,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:50,171 INFO L554 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] [2021-06-05 18:29:50,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 18:29:50,371 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:50,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:50,372 INFO L82 PathProgramCache]: Analyzing trace with hash -732703122, now seen corresponding path program 445 times [2021-06-05 18:29:50,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:50,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782342751] [2021-06-05 18:29:50,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:50,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782342751] [2021-06-05 18:29:50,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782342751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:50,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792548829] [2021-06-05 18:29:50,734 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 [2021-06-05 18:29:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:51,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792548829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:51,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:51,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:51,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937314663] [2021-06-05 18:29:51,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:51,074 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:52,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:52,133 INFO L93 Difference]: Finished difference Result 7821 states and 20697 transitions. [2021-06-05 18:29:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:29:52,133 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:52,142 INFO L225 Difference]: With dead ends: 7821 [2021-06-05 18:29:52,142 INFO L226 Difference]: Without dead ends: 7551 [2021-06-05 18:29:52,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1113.4ms TimeCoverageRelationStatistics Valid=1587, Invalid=5055, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 18:29:52,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7551 states. [2021-06-05 18:29:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7551 to 5978. [2021-06-05 18:29:52,202 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) [2021-06-05 18:29:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:52,211 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:52,211 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:52,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:52,216 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:52,216 INFO L554 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] [2021-06-05 18:29:52,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable453,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:52,417 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1366938462, now seen corresponding path program 446 times [2021-06-05 18:29:52,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:52,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512119291] [2021-06-05 18:29:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:52,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512119291] [2021-06-05 18:29:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512119291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:52,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598005658] [2021-06-05 18:29:52,785 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 [2021-06-05 18:29:52,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:29:52,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:53,087 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:53,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598005658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:53,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:53,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:53,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083377995] [2021-06-05 18:29:53,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:53,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:53,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:53,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:53,088 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) [2021-06-05 18:29:54,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:54,374 INFO L93 Difference]: Finished difference Result 7771 states and 20597 transitions. [2021-06-05 18:29:54,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:29:54,375 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 [2021-06-05 18:29:54,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:54,382 INFO L225 Difference]: With dead ends: 7771 [2021-06-05 18:29:54,382 INFO L226 Difference]: Without dead ends: 7501 [2021-06-05 18:29:54,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1329.1ms TimeCoverageRelationStatistics Valid=1730, Invalid=5580, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:29:54,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7501 states. [2021-06-05 18:29:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7501 to 5978. [2021-06-05 18:29:54,443 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) [2021-06-05 18:29:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:54,452 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:54,452 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:54,453 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) [2021-06-05 18:29:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:54,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:54,458 INFO L554 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] [2021-06-05 18:29:54,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:29:54,658 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1417828756, now seen corresponding path program 447 times [2021-06-05 18:29:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340900282] [2021-06-05 18:29:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:55,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:55,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340900282] [2021-06-05 18:29:55,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340900282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:55,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597467533] [2021-06-05 18:29:55,015 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 [2021-06-05 18:29:55,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:29:55,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:55,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:55,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:55,309 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:55,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597467533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:55,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:55,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:55,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377240172] [2021-06-05 18:29:55,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:55,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:55,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:55,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1008, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:55,310 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:56,423 INFO L93 Difference]: Finished difference Result 7721 states and 20497 transitions. [2021-06-05 18:29:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:29:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:29:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:56,432 INFO L225 Difference]: With dead ends: 7721 [2021-06-05 18:29:56,432 INFO L226 Difference]: Without dead ends: 7451 [2021-06-05 18:29:56,433 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1674 ImplicationChecksByTransitivity, 1157.0ms TimeCoverageRelationStatistics Valid=1694, Invalid=5278, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 18:29:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-06-05 18:29:56,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 5978. [2021-06-05 18:29:56,492 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) [2021-06-05 18:29:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:56,501 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:56,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:56,501 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:56,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:29:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:56,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:56,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:56,506 INFO L554 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] [2021-06-05 18:29:56,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-05 18:29:56,707 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:56,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:56,707 INFO L82 PathProgramCache]: Analyzing trace with hash -778170532, now seen corresponding path program 448 times [2021-06-05 18:29:56,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:56,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144427875] [2021-06-05 18:29:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:57,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:57,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144427875] [2021-06-05 18:29:57,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144427875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:57,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476230005] [2021-06-05 18:29:57,101 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 [2021-06-05 18:29:57,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:29:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:57,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:57,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476230005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:57,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:57,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:29:57,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328938882] [2021-06-05 18:29:57,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:29:57,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:57,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:29:57,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:29:57,399 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) [2021-06-05 18:29:58,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:29:58,817 INFO L93 Difference]: Finished difference Result 7671 states and 20397 transitions. [2021-06-05 18:29:58,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:29:58,818 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 [2021-06-05 18:29:58,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:29:58,826 INFO L225 Difference]: With dead ends: 7671 [2021-06-05 18:29:58,826 INFO L226 Difference]: Without dead ends: 7401 [2021-06-05 18:29:58,827 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1381.2ms TimeCoverageRelationStatistics Valid=1845, Invalid=5811, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:29:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7401 states. [2021-06-05 18:29:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7401 to 5978. [2021-06-05 18:29:58,888 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) [2021-06-05 18:29:58,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:29:58,897 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:29:58,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:29:58,897 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:29:58,897 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) [2021-06-05 18:29:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:29:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:29:58,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:29:58,902 INFO L554 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] [2021-06-05 18:29:59,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2021-06-05 18:29:59,103 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:29:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:29:59,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1553089558, now seen corresponding path program 449 times [2021-06-05 18:29:59,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:29:59,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163343099] [2021-06-05 18:29:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:29:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:29:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:59,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:29:59,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163343099] [2021-06-05 18:29:59,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163343099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:59,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067600758] [2021-06-05 18:29:59,452 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 [2021-06-05 18:29:59,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:29:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:29:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:29:59,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:29:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:29:59,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067600758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:29:59,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:29:59,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:29:59,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115532045] [2021-06-05 18:29:59,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:29:59,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:29:59,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:29:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:29:59,772 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:00,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:00,996 INFO L93 Difference]: Finished difference Result 7621 states and 20297 transitions. [2021-06-05 18:30:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:30:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:01,005 INFO L225 Difference]: With dead ends: 7621 [2021-06-05 18:30:01,005 INFO L226 Difference]: Without dead ends: 7351 [2021-06-05 18:30:01,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 1191.3ms TimeCoverageRelationStatistics Valid=1817, Invalid=5493, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 18:30:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2021-06-05 18:30:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 5978. [2021-06-05 18:30:01,067 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) [2021-06-05 18:30:01,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:01,077 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:01,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:01,077 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:01,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:01,077 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:01,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:01,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:01,082 INFO L554 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] [2021-06-05 18:30:01,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable457,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:01,282 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:01,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2007002918, now seen corresponding path program 450 times [2021-06-05 18:30:01,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:01,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781503110] [2021-06-05 18:30:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:01,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:01,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781503110] [2021-06-05 18:30:01,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781503110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:01,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10303777] [2021-06-05 18:30:01,641 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 [2021-06-05 18:30:01,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:01,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:01,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:01,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10303777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:01,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:01,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:01,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741773769] [2021-06-05 18:30:01,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:01,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:01,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:01,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:01,962 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) [2021-06-05 18:30:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:03,444 INFO L93 Difference]: Finished difference Result 7571 states and 20197 transitions. [2021-06-05 18:30:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:30:03,444 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 [2021-06-05 18:30:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:03,451 INFO L225 Difference]: With dead ends: 7571 [2021-06-05 18:30:03,452 INFO L226 Difference]: Without dead ends: 7301 [2021-06-05 18:30:03,452 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 1440.2ms TimeCoverageRelationStatistics Valid=1976, Invalid=6034, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:30:03,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7301 states. [2021-06-05 18:30:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7301 to 5978. [2021-06-05 18:30:03,518 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) [2021-06-05 18:30:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:03,529 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:03,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:03,530 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:03,530 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) [2021-06-05 18:30:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:03,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:03,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:03,535 INFO L554 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] [2021-06-05 18:30:03,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 18:30:03,736 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:03,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:03,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1128991000, now seen corresponding path program 451 times [2021-06-05 18:30:03,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:03,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928153955] [2021-06-05 18:30:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:04,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:04,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928153955] [2021-06-05 18:30:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928153955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:04,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659712341] [2021-06-05 18:30:04,092 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 [2021-06-05 18:30:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:04,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:04,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:04,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659712341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:04,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:04,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:30:04,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283763314] [2021-06-05 18:30:04,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:04,395 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:05,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:05,731 INFO L93 Difference]: Finished difference Result 7521 states and 20097 transitions. [2021-06-05 18:30:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:30:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:05,738 INFO L225 Difference]: With dead ends: 7521 [2021-06-05 18:30:05,739 INFO L226 Difference]: Without dead ends: 7251 [2021-06-05 18:30:05,739 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 1274.0ms TimeCoverageRelationStatistics Valid=1956, Invalid=5700, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 18:30:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7251 states. [2021-06-05 18:30:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7251 to 5978. [2021-06-05 18:30:05,799 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) [2021-06-05 18:30:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:05,809 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:05,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:05,810 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:05,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:05,810 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:05,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:05,815 INFO L554 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] [2021-06-05 18:30:06,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable459 [2021-06-05 18:30:06,016 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:06,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2029045800, now seen corresponding path program 452 times [2021-06-05 18:30:06,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:06,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592815361] [2021-06-05 18:30:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:06,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:06,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592815361] [2021-06-05 18:30:06,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592815361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:06,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314983867] [2021-06-05 18:30:06,388 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 [2021-06-05 18:30:06,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314983867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:06,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:06,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:06,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784259451] [2021-06-05 18:30:06,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:06,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:06,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:06,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:06,689 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) [2021-06-05 18:30:08,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:08,229 INFO L93 Difference]: Finished difference Result 7471 states and 19997 transitions. [2021-06-05 18:30:08,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:30:08,229 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 [2021-06-05 18:30:08,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:08,238 INFO L225 Difference]: With dead ends: 7471 [2021-06-05 18:30:08,238 INFO L226 Difference]: Without dead ends: 7201 [2021-06-05 18:30:08,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1506.0ms TimeCoverageRelationStatistics Valid=2123, Invalid=6249, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 18:30:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7201 states. [2021-06-05 18:30:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7201 to 5978. [2021-06-05 18:30:08,300 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) [2021-06-05 18:30:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:08,310 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:08,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:08,310 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:08,310 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) [2021-06-05 18:30:08,310 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:08,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:08,315 INFO L554 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] [2021-06-05 18:30:08,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:08,515 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:08,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:08,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1836857190, now seen corresponding path program 453 times [2021-06-05 18:30:08,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:08,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522202423] [2021-06-05 18:30:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:08,898 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:08,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522202423] [2021-06-05 18:30:08,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522202423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:08,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875114279] [2021-06-05 18:30:08,899 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 [2021-06-05 18:30:08,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:08,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:08,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:09,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875114279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:09,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:09,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:30:09,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928837458] [2021-06-05 18:30:09,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:09,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:09,194 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:10,472 INFO L93 Difference]: Finished difference Result 7421 states and 19897 transitions. [2021-06-05 18:30:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:30:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:10,481 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 18:30:10,481 INFO L226 Difference]: Without dead ends: 7151 [2021-06-05 18:30:10,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 1298.2ms TimeCoverageRelationStatistics Valid=2111, Invalid=5899, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 18:30:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2021-06-05 18:30:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 5978. [2021-06-05 18:30:10,542 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) [2021-06-05 18:30:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:10,551 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:10,551 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:10,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:10,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:10,556 INFO L554 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] [2021-06-05 18:30:10,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable461 [2021-06-05 18:30:10,757 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1150674006, now seen corresponding path program 454 times [2021-06-05 18:30:10,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:10,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412942261] [2021-06-05 18:30:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:11,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:11,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412942261] [2021-06-05 18:30:11,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412942261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:11,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784772006] [2021-06-05 18:30:11,111 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 [2021-06-05 18:30:11,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:11,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:11,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:11,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784772006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:11,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:11,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:11,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284542522] [2021-06-05 18:30:11,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:11,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:11,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:11,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1048, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:11,410 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) [2021-06-05 18:30:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:12,993 INFO L93 Difference]: Finished difference Result 7371 states and 19797 transitions. [2021-06-05 18:30:12,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:30:12,993 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 [2021-06-05 18:30:12,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:13,001 INFO L225 Difference]: With dead ends: 7371 [2021-06-05 18:30:13,001 INFO L226 Difference]: Without dead ends: 7101 [2021-06-05 18:30:13,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 1552.8ms TimeCoverageRelationStatistics Valid=2286, Invalid=6456, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 18:30:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7101 states. [2021-06-05 18:30:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7101 to 5978. [2021-06-05 18:30:13,060 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) [2021-06-05 18:30:13,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:13,069 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:13,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:13,069 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:13,069 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) [2021-06-05 18:30:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:13,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:13,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:13,074 INFO L554 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] [2021-06-05 18:30:13,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:13,274 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:13,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:13,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1065639268, now seen corresponding path program 455 times [2021-06-05 18:30:13,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:13,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102825526] [2021-06-05 18:30:13,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:13,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:13,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102825526] [2021-06-05 18:30:13,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102825526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:13,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337718951] [2021-06-05 18:30:13,621 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 [2021-06-05 18:30:13,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:13,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:13,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337718951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:13,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:13,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:30:13,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143841253] [2021-06-05 18:30:13,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:13,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:13,900 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:15,226 INFO L93 Difference]: Finished difference Result 7321 states and 19697 transitions. [2021-06-05 18:30:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:30:15,226 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:15,233 INFO L225 Difference]: With dead ends: 7321 [2021-06-05 18:30:15,234 INFO L226 Difference]: Without dead ends: 7051 [2021-06-05 18:30:15,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 1316.8ms TimeCoverageRelationStatistics Valid=2282, Invalid=6090, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 18:30:15,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7051 states. [2021-06-05 18:30:15,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7051 to 5978. [2021-06-05 18:30:15,294 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) [2021-06-05 18:30:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:15,304 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:15,304 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:15,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:15,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:15,310 INFO L554 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] [2021-06-05 18:30:15,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable463,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:15,510 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash 997488212, now seen corresponding path program 456 times [2021-06-05 18:30:15,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:15,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603915352] [2021-06-05 18:30:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:15,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:15,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603915352] [2021-06-05 18:30:15,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603915352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:15,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376257242] [2021-06-05 18:30:15,863 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 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 [2021-06-05 18:30:15,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:15,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:15,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:16,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376257242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:16,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:16,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:16,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238475362] [2021-06-05 18:30:16,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:16,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:16,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:16,172 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) [2021-06-05 18:30:17,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:17,848 INFO L93 Difference]: Finished difference Result 7271 states and 19597 transitions. [2021-06-05 18:30:17,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:30:17,849 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 [2021-06-05 18:30:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:17,855 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 18:30:17,855 INFO L226 Difference]: Without dead ends: 7001 [2021-06-05 18:30:17,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 1603.1ms TimeCoverageRelationStatistics Valid=2465, Invalid=6655, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 18:30:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-05 18:30:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5978. [2021-06-05 18:30:17,913 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) [2021-06-05 18:30:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:17,922 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:17,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:17,922 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:17,923 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) [2021-06-05 18:30:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:17,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:17,927 INFO L554 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] [2021-06-05 18:30:18,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:18,128 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash -299480862, now seen corresponding path program 457 times [2021-06-05 18:30:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:18,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814001033] [2021-06-05 18:30:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:18,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814001033] [2021-06-05 18:30:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814001033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907367835] [2021-06-05 18:30:18,487 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 [2021-06-05 18:30:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:18,762 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:18,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907367835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:18,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:18,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:30:18,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905586899] [2021-06-05 18:30:18,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:18,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:18,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:18,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:18,763 INFO L87 Difference]: Start difference. First operand 5978 states and 16883 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:20,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:20,156 INFO L93 Difference]: Finished difference Result 7221 states and 19497 transitions. [2021-06-05 18:30:20,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:30:20,157 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:20,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:20,165 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 18:30:20,165 INFO L226 Difference]: Without dead ends: 6951 [2021-06-05 18:30:20,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 1351.6ms TimeCoverageRelationStatistics Valid=2469, Invalid=6273, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 18:30:20,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-05 18:30:20,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5978. [2021-06-05 18:30:20,225 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) [2021-06-05 18:30:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16883 transitions. [2021-06-05 18:30:20,234 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16883 transitions. Word has length 180 [2021-06-05 18:30:20,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:20,234 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16883 transitions. [2021-06-05 18:30:20,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:20,234 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16883 transitions. [2021-06-05 18:30:20,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:20,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:20,239 INFO L554 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] [2021-06-05 18:30:20,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2021-06-05 18:30:20,439 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:20,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:20,440 INFO L82 PathProgramCache]: Analyzing trace with hash 130272722, now seen corresponding path program 458 times [2021-06-05 18:30:20,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:20,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811471522] [2021-06-05 18:30:20,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:20,827 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:20,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:20,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811471522] [2021-06-05 18:30:20,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811471522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:20,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900226810] [2021-06-05 18:30:20,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:30:20,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:20,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900226810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:21,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:21,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-06-05 18:30:21,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825562775] [2021-06-05 18:30:21,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:21,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:21,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:21,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:21,117 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) [2021-06-05 18:30:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:22,848 INFO L93 Difference]: Finished difference Result 7231 states and 19547 transitions. [2021-06-05 18:30:22,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:30:22,848 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 [2021-06-05 18:30:22,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:22,857 INFO L225 Difference]: With dead ends: 7231 [2021-06-05 18:30:22,857 INFO L226 Difference]: Without dead ends: 6961 [2021-06-05 18:30:22,858 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 1700.9ms TimeCoverageRelationStatistics Valid=2660, Invalid=6846, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 18:30:22,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6961 states. [2021-06-05 18:30:22,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6961 to 5978. [2021-06-05 18:30:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5978 states, 5977 states have (on average 2.82549774134181) internal successors, (16888), 5977 states have internal predecessors, (16888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5978 states to 5978 states and 16888 transitions. [2021-06-05 18:30:22,928 INFO L78 Accepts]: Start accepts. Automaton has 5978 states and 16888 transitions. Word has length 180 [2021-06-05 18:30:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:22,928 INFO L482 AbstractCegarLoop]: Abstraction has 5978 states and 16888 transitions. [2021-06-05 18:30:22,928 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) [2021-06-05 18:30:22,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5978 states and 16888 transitions. [2021-06-05 18:30:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:22,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:22,933 INFO L554 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] [2021-06-05 18:30:23,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 18:30:23,134 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:23,134 INFO L82 PathProgramCache]: Analyzing trace with hash 72538592, now seen corresponding path program 459 times [2021-06-05 18:30:23,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:23,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235221784] [2021-06-05 18:30:23,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:23,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:23,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235221784] [2021-06-05 18:30:23,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235221784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:23,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299908226] [2021-06-05 18:30:23,488 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 [2021-06-05 18:30:23,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:23,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:23,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:23,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:23,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299908226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:23,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:23,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-06-05 18:30:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263529141] [2021-06-05 18:30:23,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 18:30:23,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:23,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 18:30:23,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:30:23,807 INFO L87 Difference]: Start difference. First operand 5978 states and 16888 transitions. Second operand has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:25,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:25,239 INFO L93 Difference]: Finished difference Result 7998 states and 21721 transitions. [2021-06-05 18:30:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:30:25,239 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2021-06-05 18:30:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:25,248 INFO L225 Difference]: With dead ends: 7998 [2021-06-05 18:30:25,248 INFO L226 Difference]: Without dead ends: 7728 [2021-06-05 18:30:25,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2489 ImplicationChecksByTransitivity, 1389.8ms TimeCoverageRelationStatistics Valid=2673, Invalid=6447, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 18:30:25,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2021-06-05 18:30:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 6158. [2021-06-05 18:30:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6158 states, 6157 states have (on average 2.833685236316388) internal successors, (17447), 6157 states have internal predecessors, (17447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:25,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6158 states to 6158 states and 17447 transitions. [2021-06-05 18:30:25,327 INFO L78 Accepts]: Start accepts. Automaton has 6158 states and 17447 transitions. Word has length 180 [2021-06-05 18:30:25,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:25,327 INFO L482 AbstractCegarLoop]: Abstraction has 6158 states and 17447 transitions. [2021-06-05 18:30:25,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.142857142857143) internal successors, (180), 35 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:25,327 INFO L276 IsEmpty]: Start isEmpty. Operand 6158 states and 17447 transitions. [2021-06-05 18:30:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-06-05 18:30:25,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:25,332 INFO L554 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] [2021-06-05 18:30:25,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:25,532 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:25,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:25,533 INFO L82 PathProgramCache]: Analyzing trace with hash 94881842, now seen corresponding path program 460 times [2021-06-05 18:30:25,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:25,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872173388] [2021-06-05 18:30:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872173388] [2021-06-05 18:30:25,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872173388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237332130] [2021-06-05 18:30:25,887 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 [2021-06-05 18:30:25,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:25,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:25,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:30:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:26,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237332130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:26,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:26,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 37 [2021-06-05 18:30:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010352359] [2021-06-05 18:30:26,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:26,197 INFO L87 Difference]: Start difference. First operand 6158 states and 17447 transitions. Second operand has 37 states, 37 states have (on average 4.945945945945946) internal successors, (183), 37 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:28,053 INFO L93 Difference]: Finished difference Result 7821 states and 21221 transitions. [2021-06-05 18:30:28,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 18:30:28,054 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 [2021-06-05 18:30:28,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:28,062 INFO L225 Difference]: With dead ends: 7821 [2021-06-05 18:30:28,062 INFO L226 Difference]: Without dead ends: 7246 [2021-06-05 18:30:28,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1785.8ms TimeCoverageRelationStatistics Valid=2964, Invalid=7748, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 18:30:28,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-06-05 18:30:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 4003. [2021-06-05 18:30:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.7406296851574212) internal successors, (10968), 4002 states have internal predecessors, (10968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 10968 transitions. [2021-06-05 18:30:28,119 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 10968 transitions. Word has length 180 [2021-06-05 18:30:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:28,119 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 10968 transitions. [2021-06-05 18:30:28,119 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) [2021-06-05 18:30:28,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 10968 transitions. [2021-06-05 18:30:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:28,123 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:28,123 INFO L554 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] [2021-06-05 18:30:28,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 18:30:28,323 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -730740019, now seen corresponding path program 461 times [2021-06-05 18:30:28,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:28,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56882291] [2021-06-05 18:30:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:28,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:28,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56882291] [2021-06-05 18:30:28,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56882291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:28,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547033386] [2021-06-05 18:30:28,770 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 [2021-06-05 18:30:28,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:28,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:28,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:29,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547033386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:29,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:29,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:29,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151548532] [2021-06-05 18:30:29,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:29,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:29,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:29,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=979, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:29,080 INFO L87 Difference]: Start difference. First operand 4003 states and 10968 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:29,907 INFO L93 Difference]: Finished difference Result 5921 states and 15007 transitions. [2021-06-05 18:30:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:30:29,908 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 [2021-06-05 18:30:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:29,912 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 18:30:29,912 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 18:30:29,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1006.4ms TimeCoverageRelationStatistics Valid=1382, Invalid=3730, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 18:30:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 18:30:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4078. [2021-06-05 18:30:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4078 states, 4077 states have (on average 2.745401030169242) internal successors, (11193), 4077 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:29,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4078 states to 4078 states and 11193 transitions. [2021-06-05 18:30:29,959 INFO L78 Accepts]: Start accepts. Automaton has 4078 states and 11193 transitions. Word has length 185 [2021-06-05 18:30:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:29,959 INFO L482 AbstractCegarLoop]: Abstraction has 4078 states and 11193 transitions. [2021-06-05 18:30:29,959 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) [2021-06-05 18:30:29,959 INFO L276 IsEmpty]: Start isEmpty. Operand 4078 states and 11193 transitions. [2021-06-05 18:30:29,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:29,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:29,962 INFO L554 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] [2021-06-05 18:30:30,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 18:30:30,163 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:30,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:30,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2000868285, now seen corresponding path program 462 times [2021-06-05 18:30:30,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:30,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138793982] [2021-06-05 18:30:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:30,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138793982] [2021-06-05 18:30:30,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138793982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:30,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98873638] [2021-06-05 18:30:30,627 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 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 [2021-06-05 18:30:30,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:30,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:30,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:30,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98873638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:30,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:30,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:30,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603840356] [2021-06-05 18:30:30,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:30,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:30,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:30,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:30,969 INFO L87 Difference]: Start difference. First operand 4078 states and 11193 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:31,911 INFO L93 Difference]: Finished difference Result 6691 states and 16622 transitions. [2021-06-05 18:30:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:30:31,911 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 [2021-06-05 18:30:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:31,919 INFO L225 Difference]: With dead ends: 6691 [2021-06-05 18:30:31,919 INFO L226 Difference]: Without dead ends: 6421 [2021-06-05 18:30:31,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 1072.3ms TimeCoverageRelationStatistics Valid=1453, Invalid=4097, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:30:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6421 states. [2021-06-05 18:30:31,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6421 to 4153. [2021-06-05 18:30:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4152 states have (on average 2.75) internal successors, (11418), 4152 states have internal predecessors, (11418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 11418 transitions. [2021-06-05 18:30:31,972 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 11418 transitions. Word has length 185 [2021-06-05 18:30:31,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:31,972 INFO L482 AbstractCegarLoop]: Abstraction has 4153 states and 11418 transitions. [2021-06-05 18:30:31,972 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) [2021-06-05 18:30:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 11418 transitions. [2021-06-05 18:30:31,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:31,976 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:31,976 INFO L554 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] [2021-06-05 18:30:32,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:32,176 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:32,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash -601344949, now seen corresponding path program 463 times [2021-06-05 18:30:32,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:32,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078938272] [2021-06-05 18:30:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:32,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078938272] [2021-06-05 18:30:32,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078938272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:32,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518268994] [2021-06-05 18:30:32,637 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 [2021-06-05 18:30:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:32,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:32,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:32,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518268994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:32,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:32,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904668717] [2021-06-05 18:30:32,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:32,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:32,939 INFO L87 Difference]: Start difference. First operand 4153 states and 11418 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:33,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:33,793 INFO L93 Difference]: Finished difference Result 6721 states and 16757 transitions. [2021-06-05 18:30:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:30:33,793 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 [2021-06-05 18:30:33,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:33,799 INFO L225 Difference]: With dead ends: 6721 [2021-06-05 18:30:33,800 INFO L226 Difference]: Without dead ends: 6451 [2021-06-05 18:30:33,800 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1045.3ms TimeCoverageRelationStatistics Valid=1441, Invalid=4109, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:30:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6451 states. [2021-06-05 18:30:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6451 to 4228. [2021-06-05 18:30:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.7544357700496804) internal successors, (11643), 4227 states have internal predecessors, (11643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11643 transitions. [2021-06-05 18:30:33,855 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11643 transitions. Word has length 185 [2021-06-05 18:30:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:33,855 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11643 transitions. [2021-06-05 18:30:33,855 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) [2021-06-05 18:30:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11643 transitions. [2021-06-05 18:30:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:33,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:33,859 INFO L554 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] [2021-06-05 18:30:34,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:34,059 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:34,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:34,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1542280901, now seen corresponding path program 464 times [2021-06-05 18:30:34,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:34,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073102743] [2021-06-05 18:30:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:34,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073102743] [2021-06-05 18:30:34,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073102743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:34,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945731867] [2021-06-05 18:30:34,532 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 [2021-06-05 18:30:34,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:34,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:34,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:34,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945731867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:34,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371234565] [2021-06-05 18:30:34,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:34,858 INFO L87 Difference]: Start difference. First operand 4228 states and 11643 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:35,880 INFO L93 Difference]: Finished difference Result 6746 states and 16882 transitions. [2021-06-05 18:30:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:30:35,880 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 [2021-06-05 18:30:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:35,886 INFO L225 Difference]: With dead ends: 6746 [2021-06-05 18:30:35,886 INFO L226 Difference]: Without dead ends: 6476 [2021-06-05 18:30:35,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1140.5ms TimeCoverageRelationStatistics Valid=1463, Invalid=4389, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:30:35,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6476 states. [2021-06-05 18:30:35,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6476 to 4303. [2021-06-05 18:30:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4303 states, 4302 states have (on average 2.758716875871688) internal successors, (11868), 4302 states have internal predecessors, (11868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:35,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 11868 transitions. [2021-06-05 18:30:35,938 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 11868 transitions. Word has length 185 [2021-06-05 18:30:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:35,938 INFO L482 AbstractCegarLoop]: Abstraction has 4303 states and 11868 transitions. [2021-06-05 18:30:35,938 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) [2021-06-05 18:30:35,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 11868 transitions. [2021-06-05 18:30:35,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:35,942 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:35,942 INFO L554 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] [2021-06-05 18:30:36,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:36,142 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:36,143 INFO L82 PathProgramCache]: Analyzing trace with hash 89047881, now seen corresponding path program 465 times [2021-06-05 18:30:36,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:36,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123837270] [2021-06-05 18:30:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:36,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123837270] [2021-06-05 18:30:36,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123837270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:36,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729929960] [2021-06-05 18:30:36,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:30:36,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:36,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:36,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:36,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:36,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729929960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:36,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:36,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:36,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91593663] [2021-06-05 18:30:36,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:36,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:36,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:36,884 INFO L87 Difference]: Start difference. First operand 4303 states and 11868 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:37,835 INFO L93 Difference]: Finished difference Result 6771 states and 17007 transitions. [2021-06-05 18:30:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:30:37,836 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 [2021-06-05 18:30:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:37,843 INFO L225 Difference]: With dead ends: 6771 [2021-06-05 18:30:37,843 INFO L226 Difference]: Without dead ends: 6501 [2021-06-05 18:30:37,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1035.7ms TimeCoverageRelationStatistics Valid=1465, Invalid=4387, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:30:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6501 states. [2021-06-05 18:30:37,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6501 to 4378. [2021-06-05 18:30:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4378 states, 4377 states have (on average 2.7628512679917754) internal successors, (12093), 4377 states have internal predecessors, (12093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:37,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4378 states to 4378 states and 12093 transitions. [2021-06-05 18:30:37,905 INFO L78 Accepts]: Start accepts. Automaton has 4378 states and 12093 transitions. Word has length 185 [2021-06-05 18:30:37,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:37,905 INFO L482 AbstractCegarLoop]: Abstraction has 4378 states and 12093 transitions. [2021-06-05 18:30:37,905 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) [2021-06-05 18:30:37,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4378 states and 12093 transitions. [2021-06-05 18:30:37,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:37,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:37,909 INFO L554 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] [2021-06-05 18:30:38,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:38,110 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash -756440007, now seen corresponding path program 466 times [2021-06-05 18:30:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:38,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078406829] [2021-06-05 18:30:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:38,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078406829] [2021-06-05 18:30:38,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078406829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065497416] [2021-06-05 18:30:38,569 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 [2021-06-05 18:30:38,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:38,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:38,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:38,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:38,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065497416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:38,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:38,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:38,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404747037] [2021-06-05 18:30:38,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:38,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:38,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:38,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:38,890 INFO L87 Difference]: Start difference. First operand 4378 states and 12093 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:39,900 INFO L93 Difference]: Finished difference Result 6796 states and 17132 transitions. [2021-06-05 18:30:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:30:39,900 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 [2021-06-05 18:30:39,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:39,906 INFO L225 Difference]: With dead ends: 6796 [2021-06-05 18:30:39,907 INFO L226 Difference]: Without dead ends: 6526 [2021-06-05 18:30:39,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 1166.8ms TimeCoverageRelationStatistics Valid=1489, Invalid=4673, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:30:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6526 states. [2021-06-05 18:30:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6526 to 4453. [2021-06-05 18:30:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 2.766846361185984) internal successors, (12318), 4452 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 12318 transitions. [2021-06-05 18:30:39,961 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 12318 transitions. Word has length 185 [2021-06-05 18:30:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:39,961 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 12318 transitions. [2021-06-05 18:30:39,961 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) [2021-06-05 18:30:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 12318 transitions. [2021-06-05 18:30:39,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:39,965 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:39,965 INFO L554 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] [2021-06-05 18:30:40,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 18:30:40,165 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:40,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1632524231, now seen corresponding path program 467 times [2021-06-05 18:30:40,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:40,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160856963] [2021-06-05 18:30:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:40,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:40,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:40,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160856963] [2021-06-05 18:30:40,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160856963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:40,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886023793] [2021-06-05 18:30:40,575 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 [2021-06-05 18:30:40,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:40,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886023793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:40,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:40,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:40,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325418813] [2021-06-05 18:30:40,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:40,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:40,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:40,878 INFO L87 Difference]: Start difference. First operand 4453 states and 12318 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:41,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:41,911 INFO L93 Difference]: Finished difference Result 6821 states and 17257 transitions. [2021-06-05 18:30:41,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:30:41,912 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 [2021-06-05 18:30:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:41,918 INFO L225 Difference]: With dead ends: 6821 [2021-06-05 18:30:41,919 INFO L226 Difference]: Without dead ends: 6551 [2021-06-05 18:30:41,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 1068.6ms TimeCoverageRelationStatistics Valid=1505, Invalid=4657, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:30:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6551 states. [2021-06-05 18:30:41,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6551 to 4528. [2021-06-05 18:30:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4528 states, 4527 states have (on average 2.7707090788601723) internal successors, (12543), 4527 states have internal predecessors, (12543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:41,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4528 states to 4528 states and 12543 transitions. [2021-06-05 18:30:41,976 INFO L78 Accepts]: Start accepts. Automaton has 4528 states and 12543 transitions. Word has length 185 [2021-06-05 18:30:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:41,977 INFO L482 AbstractCegarLoop]: Abstraction has 4528 states and 12543 transitions. [2021-06-05 18:30:41,977 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) [2021-06-05 18:30:41,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4528 states and 12543 transitions. [2021-06-05 18:30:41,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:41,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:41,980 INFO L554 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] [2021-06-05 18:30:42,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 18:30:42,181 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:42,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:42,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1779391305, now seen corresponding path program 468 times [2021-06-05 18:30:42,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:42,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778929788] [2021-06-05 18:30:42,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:42,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:42,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778929788] [2021-06-05 18:30:42,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778929788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:42,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976762882] [2021-06-05 18:30:42,611 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 [2021-06-05 18:30:42,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:42,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:42,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:42,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:42,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976762882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:42,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:42,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:42,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681554086] [2021-06-05 18:30:42,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:42,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:42,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:42,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:42,941 INFO L87 Difference]: Start difference. First operand 4528 states and 12543 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:44,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:44,097 INFO L93 Difference]: Finished difference Result 6846 states and 17382 transitions. [2021-06-05 18:30:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:30:44,098 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 [2021-06-05 18:30:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:44,105 INFO L225 Difference]: With dead ends: 6846 [2021-06-05 18:30:44,105 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 18:30:44,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 1188.9ms TimeCoverageRelationStatistics Valid=1531, Invalid=4949, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:30:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 18:30:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4603. [2021-06-05 18:30:44,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 4602 states have (on average 2.7744458930899607) internal successors, (12768), 4602 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 12768 transitions. [2021-06-05 18:30:44,182 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 12768 transitions. Word has length 185 [2021-06-05 18:30:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:44,183 INFO L482 AbstractCegarLoop]: Abstraction has 4603 states and 12768 transitions. [2021-06-05 18:30:44,183 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) [2021-06-05 18:30:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 12768 transitions. [2021-06-05 18:30:44,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:44,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:44,187 INFO L554 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] [2021-06-05 18:30:44,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2021-06-05 18:30:44,387 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash 623366597, now seen corresponding path program 469 times [2021-06-05 18:30:44,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:44,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324289634] [2021-06-05 18:30:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:44,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324289634] [2021-06-05 18:30:44,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324289634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:44,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161015198] [2021-06-05 18:30:44,788 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 [2021-06-05 18:30:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:44,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161015198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:45,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:45,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:45,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916250664] [2021-06-05 18:30:45,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:45,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:45,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:45,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:45,084 INFO L87 Difference]: Start difference. First operand 4603 states and 12768 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:46,076 INFO L93 Difference]: Finished difference Result 6871 states and 17507 transitions. [2021-06-05 18:30:46,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:30:46,077 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 [2021-06-05 18:30:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:46,085 INFO L225 Difference]: With dead ends: 6871 [2021-06-05 18:30:46,085 INFO L226 Difference]: Without dead ends: 6601 [2021-06-05 18:30:46,085 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1505 ImplicationChecksByTransitivity, 1081.5ms TimeCoverageRelationStatistics Valid=1561, Invalid=4919, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:30:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-05 18:30:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 4678. [2021-06-05 18:30:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 2.7780628608082103) internal successors, (12993), 4677 states have internal predecessors, (12993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 12993 transitions. [2021-06-05 18:30:46,145 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 12993 transitions. Word has length 185 [2021-06-05 18:30:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:46,146 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 12993 transitions. [2021-06-05 18:30:46,146 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) [2021-06-05 18:30:46,146 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 12993 transitions. [2021-06-05 18:30:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:46,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:46,150 INFO L554 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] [2021-06-05 18:30:46,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2021-06-05 18:30:46,350 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:46,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:46,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1830253899, now seen corresponding path program 470 times [2021-06-05 18:30:46,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:46,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766874257] [2021-06-05 18:30:46,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:46,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:46,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:46,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766874257] [2021-06-05 18:30:46,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766874257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:46,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464885254] [2021-06-05 18:30:46,761 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 [2021-06-05 18:30:46,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:46,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:46,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:47,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464885254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:47,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:47,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:47,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301658265] [2021-06-05 18:30:47,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:47,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:47,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:47,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:47,102 INFO L87 Difference]: Start difference. First operand 4678 states and 12993 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:48,199 INFO L93 Difference]: Finished difference Result 6896 states and 17632 transitions. [2021-06-05 18:30:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:30:48,200 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 [2021-06-05 18:30:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:48,206 INFO L225 Difference]: With dead ends: 6896 [2021-06-05 18:30:48,207 INFO L226 Difference]: Without dead ends: 6626 [2021-06-05 18:30:48,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1221.4ms TimeCoverageRelationStatistics Valid=1589, Invalid=5217, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:30:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6626 states. [2021-06-05 18:30:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6626 to 4753. [2021-06-05 18:30:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4753 states, 4752 states have (on average 2.7815656565656566) internal successors, (13218), 4752 states have internal predecessors, (13218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 13218 transitions. [2021-06-05 18:30:48,267 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 13218 transitions. Word has length 185 [2021-06-05 18:30:48,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:48,267 INFO L482 AbstractCegarLoop]: Abstraction has 4753 states and 13218 transitions. [2021-06-05 18:30:48,267 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) [2021-06-05 18:30:48,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 13218 transitions. [2021-06-05 18:30:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:48,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:48,271 INFO L554 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] [2021-06-05 18:30:48,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 18:30:48,472 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:48,472 INFO L82 PathProgramCache]: Analyzing trace with hash -948694717, now seen corresponding path program 471 times [2021-06-05 18:30:48,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:48,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589377868] [2021-06-05 18:30:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:48,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589377868] [2021-06-05 18:30:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589377868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:48,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600500114] [2021-06-05 18:30:48,864 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 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 [2021-06-05 18:30:48,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:30:48,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600500114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:49,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:49,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:49,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004913735] [2021-06-05 18:30:49,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:49,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:49,175 INFO L87 Difference]: Start difference. First operand 4753 states and 13218 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:50,188 INFO L93 Difference]: Finished difference Result 6921 states and 17757 transitions. [2021-06-05 18:30:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 18:30:50,188 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 [2021-06-05 18:30:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:50,194 INFO L225 Difference]: With dead ends: 6921 [2021-06-05 18:30:50,194 INFO L226 Difference]: Without dead ends: 6651 [2021-06-05 18:30:50,194 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 1134.3ms TimeCoverageRelationStatistics Valid=1633, Invalid=5173, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:30:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6651 states. [2021-06-05 18:30:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6651 to 4828. [2021-06-05 18:30:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4828 states, 4827 states have (on average 2.7849596022374143) internal successors, (13443), 4827 states have internal predecessors, (13443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4828 states to 4828 states and 13443 transitions. [2021-06-05 18:30:50,250 INFO L78 Accepts]: Start accepts. Automaton has 4828 states and 13443 transitions. Word has length 185 [2021-06-05 18:30:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:50,250 INFO L482 AbstractCegarLoop]: Abstraction has 4828 states and 13443 transitions. [2021-06-05 18:30:50,250 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) [2021-06-05 18:30:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4828 states and 13443 transitions. [2021-06-05 18:30:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:50,254 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:50,254 INFO L554 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] [2021-06-05 18:30:50,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:50,455 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1591069133, now seen corresponding path program 472 times [2021-06-05 18:30:50,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:50,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552328746] [2021-06-05 18:30:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:50,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:50,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:50,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552328746] [2021-06-05 18:30:50,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552328746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:50,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799185350] [2021-06-05 18:30:50,910 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 [2021-06-05 18:30:50,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:30:50,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:50,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:50,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:51,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799185350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:51,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:51,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:51,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802577375] [2021-06-05 18:30:51,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:51,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:51,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:51,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:51,223 INFO L87 Difference]: Start difference. First operand 4828 states and 13443 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:52,424 INFO L93 Difference]: Finished difference Result 6946 states and 17882 transitions. [2021-06-05 18:30:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 18:30:52,424 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 [2021-06-05 18:30:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:52,431 INFO L225 Difference]: With dead ends: 6946 [2021-06-05 18:30:52,431 INFO L226 Difference]: Without dead ends: 6676 [2021-06-05 18:30:52,432 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1313.1ms TimeCoverageRelationStatistics Valid=1663, Invalid=5477, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:30:52,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2021-06-05 18:30:52,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4903. [2021-06-05 18:30:52,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4903 states, 4902 states have (on average 2.788249694002448) internal successors, (13668), 4902 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4903 states to 4903 states and 13668 transitions. [2021-06-05 18:30:52,494 INFO L78 Accepts]: Start accepts. Automaton has 4903 states and 13668 transitions. Word has length 185 [2021-06-05 18:30:52,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:52,495 INFO L482 AbstractCegarLoop]: Abstraction has 4903 states and 13668 transitions. [2021-06-05 18:30:52,495 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) [2021-06-05 18:30:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 4903 states and 13668 transitions. [2021-06-05 18:30:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:52,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:52,499 INFO L554 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] [2021-06-05 18:30:52,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:52,699 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:52,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:52,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1637616063, now seen corresponding path program 473 times [2021-06-05 18:30:52,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:52,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794133800] [2021-06-05 18:30:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:53,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:53,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:53,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794133800] [2021-06-05 18:30:53,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794133800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:53,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421774155] [2021-06-05 18:30:53,107 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 [2021-06-05 18:30:53,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:30:53,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:53,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:53,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421774155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:53,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:53,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:53,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391491924] [2021-06-05 18:30:53,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:53,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:53,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:53,402 INFO L87 Difference]: Start difference. First operand 4903 states and 13668 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:54,473 INFO L93 Difference]: Finished difference Result 6971 states and 18007 transitions. [2021-06-05 18:30:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 18:30:54,474 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 [2021-06-05 18:30:54,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:54,481 INFO L225 Difference]: With dead ends: 6971 [2021-06-05 18:30:54,481 INFO L226 Difference]: Without dead ends: 6701 [2021-06-05 18:30:54,482 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 1169.2ms TimeCoverageRelationStatistics Valid=1721, Invalid=5419, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:30:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6701 states. [2021-06-05 18:30:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6701 to 4978. [2021-06-05 18:30:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4977 states have (on average 2.7914406268836647) internal successors, (13893), 4977 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 13893 transitions. [2021-06-05 18:30:54,543 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 13893 transitions. Word has length 185 [2021-06-05 18:30:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:54,544 INFO L482 AbstractCegarLoop]: Abstraction has 4978 states and 13893 transitions. [2021-06-05 18:30:54,544 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) [2021-06-05 18:30:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 13893 transitions. [2021-06-05 18:30:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:54,548 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:54,548 INFO L554 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] [2021-06-05 18:30:54,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:54,749 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:54,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:54,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1738966833, now seen corresponding path program 474 times [2021-06-05 18:30:54,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:54,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902603918] [2021-06-05 18:30:54,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:55,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902603918] [2021-06-05 18:30:55,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902603918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:55,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489323086] [2021-06-05 18:30:55,145 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 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 [2021-06-05 18:30:55,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:30:55,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:55,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:55,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:55,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489323086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:55,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:55,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856803743] [2021-06-05 18:30:55,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:55,470 INFO L87 Difference]: Start difference. First operand 4978 states and 13893 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:56,736 INFO L93 Difference]: Finished difference Result 6996 states and 18132 transitions. [2021-06-05 18:30:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 18:30:56,736 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 [2021-06-05 18:30:56,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:56,743 INFO L225 Difference]: With dead ends: 6996 [2021-06-05 18:30:56,743 INFO L226 Difference]: Without dead ends: 6726 [2021-06-05 18:30:56,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 1338.6ms TimeCoverageRelationStatistics Valid=1753, Invalid=5729, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:30:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-06-05 18:30:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5053. [2021-06-05 18:30:56,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 5052 states have (on average 2.794536817102138) internal successors, (14118), 5052 states have internal predecessors, (14118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 14118 transitions. [2021-06-05 18:30:56,807 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 14118 transitions. Word has length 185 [2021-06-05 18:30:56,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:56,807 INFO L482 AbstractCegarLoop]: Abstraction has 5053 states and 14118 transitions. [2021-06-05 18:30:56,807 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) [2021-06-05 18:30:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 14118 transitions. [2021-06-05 18:30:56,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:56,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:56,811 INFO L554 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] [2021-06-05 18:30:57,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:57,012 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash -37723969, now seen corresponding path program 475 times [2021-06-05 18:30:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:57,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275039693] [2021-06-05 18:30:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:57,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:57,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:57,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275039693] [2021-06-05 18:30:57,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275039693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:57,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979044410] [2021-06-05 18:30:57,387 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 [2021-06-05 18:30:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:57,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:57,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979044410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:57,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:57,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:30:57,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140698144] [2021-06-05 18:30:57,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:30:57,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:57,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:30:57,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:30:57,677 INFO L87 Difference]: Start difference. First operand 5053 states and 14118 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:30:58,792 INFO L93 Difference]: Finished difference Result 7021 states and 18257 transitions. [2021-06-05 18:30:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 18:30:58,793 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 [2021-06-05 18:30:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:30:58,800 INFO L225 Difference]: With dead ends: 7021 [2021-06-05 18:30:58,800 INFO L226 Difference]: Without dead ends: 6751 [2021-06-05 18:30:58,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1898 ImplicationChecksByTransitivity, 1174.2ms TimeCoverageRelationStatistics Valid=1825, Invalid=5657, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 18:30:58,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-06-05 18:30:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 5128. [2021-06-05 18:30:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 2.7975424224692804) internal successors, (14343), 5127 states have internal predecessors, (14343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:30:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 14343 transitions. [2021-06-05 18:30:58,882 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 14343 transitions. Word has length 185 [2021-06-05 18:30:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:30:58,882 INFO L482 AbstractCegarLoop]: Abstraction has 5128 states and 14343 transitions. [2021-06-05 18:30:58,882 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) [2021-06-05 18:30:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 14343 transitions. [2021-06-05 18:30:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:30:58,887 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:30:58,887 INFO L554 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] [2021-06-05 18:30:59,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:30:59,087 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:30:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:30:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2061917615, now seen corresponding path program 476 times [2021-06-05 18:30:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:30:59,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58615176] [2021-06-05 18:30:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:30:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:30:59,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:59,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:30:59,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58615176] [2021-06-05 18:30:59,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58615176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:59,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036734150] [2021-06-05 18:30:59,469 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 [2021-06-05 18:30:59,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:30:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:30:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:30:59,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:30:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:30:59,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036734150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:30:59,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:30:59,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:30:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291313660] [2021-06-05 18:30:59,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:30:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:30:59,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:30:59,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:30:59,777 INFO L87 Difference]: Start difference. First operand 5128 states and 14343 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:01,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:01,072 INFO L93 Difference]: Finished difference Result 7046 states and 18382 transitions. [2021-06-05 18:31:01,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 18:31:01,072 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 [2021-06-05 18:31:01,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:01,079 INFO L225 Difference]: With dead ends: 7046 [2021-06-05 18:31:01,079 INFO L226 Difference]: Without dead ends: 6776 [2021-06-05 18:31:01,080 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1352.5ms TimeCoverageRelationStatistics Valid=1859, Invalid=5973, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:31:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6776 states. [2021-06-05 18:31:01,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6776 to 5203. [2021-06-05 18:31:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5203 states, 5202 states have (on average 2.800461361014994) internal successors, (14568), 5202 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:01,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5203 states to 5203 states and 14568 transitions. [2021-06-05 18:31:01,146 INFO L78 Accepts]: Start accepts. Automaton has 5203 states and 14568 transitions. Word has length 185 [2021-06-05 18:31:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:01,146 INFO L482 AbstractCegarLoop]: Abstraction has 5203 states and 14568 transitions. [2021-06-05 18:31:01,146 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) [2021-06-05 18:31:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 5203 states and 14568 transitions. [2021-06-05 18:31:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:01,150 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:01,150 INFO L554 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] [2021-06-05 18:31:01,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:01,351 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:01,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:01,351 INFO L82 PathProgramCache]: Analyzing trace with hash -722849603, now seen corresponding path program 477 times [2021-06-05 18:31:01,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:01,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386162712] [2021-06-05 18:31:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:01,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386162712] [2021-06-05 18:31:01,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386162712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:01,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000453528] [2021-06-05 18:31:01,729 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 [2021-06-05 18:31:01,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:01,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:02,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000453528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:02,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:02,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:02,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347363872] [2021-06-05 18:31:02,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:02,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:02,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:02,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1067, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:02,055 INFO L87 Difference]: Start difference. First operand 5203 states and 14568 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:03,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:03,198 INFO L93 Difference]: Finished difference Result 7071 states and 18507 transitions. [2021-06-05 18:31:03,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 18:31:03,198 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 [2021-06-05 18:31:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:03,206 INFO L225 Difference]: With dead ends: 7071 [2021-06-05 18:31:03,206 INFO L226 Difference]: Without dead ends: 6801 [2021-06-05 18:31:03,207 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 1210.6ms TimeCoverageRelationStatistics Valid=1945, Invalid=5887, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 18:31:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-06-05 18:31:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 5278. [2021-06-05 18:31:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5278 states, 5277 states have (on average 2.803297328027288) internal successors, (14793), 5277 states have internal predecessors, (14793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5278 states to 5278 states and 14793 transitions. [2021-06-05 18:31:03,274 INFO L78 Accepts]: Start accepts. Automaton has 5278 states and 14793 transitions. Word has length 185 [2021-06-05 18:31:03,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:03,275 INFO L482 AbstractCegarLoop]: Abstraction has 5278 states and 14793 transitions. [2021-06-05 18:31:03,275 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) [2021-06-05 18:31:03,275 INFO L276 IsEmpty]: Start isEmpty. Operand 5278 states and 14793 transitions. [2021-06-05 18:31:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:03,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:03,279 INFO L554 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] [2021-06-05 18:31:03,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable485,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:03,479 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash -83191379, now seen corresponding path program 478 times [2021-06-05 18:31:03,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:03,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052682931] [2021-06-05 18:31:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:03,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:03,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052682931] [2021-06-05 18:31:03,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052682931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:03,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714303124] [2021-06-05 18:31:03,901 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 [2021-06-05 18:31:03,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:03,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:04,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:04,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714303124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:04,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:04,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105346845] [2021-06-05 18:31:04,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:04,234 INFO L87 Difference]: Start difference. First operand 5278 states and 14793 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:05,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:05,619 INFO L93 Difference]: Finished difference Result 7096 states and 18632 transitions. [2021-06-05 18:31:05,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 18:31:05,619 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 [2021-06-05 18:31:05,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:05,626 INFO L225 Difference]: With dead ends: 7096 [2021-06-05 18:31:05,626 INFO L226 Difference]: Without dead ends: 6826 [2021-06-05 18:31:05,627 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 1479.4ms TimeCoverageRelationStatistics Valid=1981, Invalid=6209, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:31:05,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6826 states. [2021-06-05 18:31:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6826 to 5353. [2021-06-05 18:31:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5353 states, 5352 states have (on average 2.8060538116591927) internal successors, (15018), 5352 states have internal predecessors, (15018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5353 states to 5353 states and 15018 transitions. [2021-06-05 18:31:05,695 INFO L78 Accepts]: Start accepts. Automaton has 5353 states and 15018 transitions. Word has length 185 [2021-06-05 18:31:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:05,695 INFO L482 AbstractCegarLoop]: Abstraction has 5353 states and 15018 transitions. [2021-06-05 18:31:05,695 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) [2021-06-05 18:31:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5353 states and 15018 transitions. [2021-06-05 18:31:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:05,700 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:05,700 INFO L554 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] [2021-06-05 18:31:05,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 18:31:05,900 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:05,901 INFO L82 PathProgramCache]: Analyzing trace with hash -858110405, now seen corresponding path program 479 times [2021-06-05 18:31:05,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:05,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188035715] [2021-06-05 18:31:05,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:06,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:06,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188035715] [2021-06-05 18:31:06,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188035715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:06,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413396285] [2021-06-05 18:31:06,268 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 [2021-06-05 18:31:06,343 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:06,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:06,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413396285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:06,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:06,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:06,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689774134] [2021-06-05 18:31:06,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:06,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:06,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:06,555 INFO L87 Difference]: Start difference. First operand 5353 states and 15018 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:07,798 INFO L93 Difference]: Finished difference Result 7121 states and 18757 transitions. [2021-06-05 18:31:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 18:31:07,798 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 [2021-06-05 18:31:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:07,804 INFO L225 Difference]: With dead ends: 7121 [2021-06-05 18:31:07,804 INFO L226 Difference]: Without dead ends: 6851 [2021-06-05 18:31:07,805 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 1278.4ms TimeCoverageRelationStatistics Valid=2081, Invalid=6109, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 18:31:07,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6851 states. [2021-06-05 18:31:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6851 to 5428. [2021-06-05 18:31:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5428 states, 5427 states have (on average 2.80873410724157) internal successors, (15243), 5427 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 15243 transitions. [2021-06-05 18:31:07,871 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 15243 transitions. Word has length 185 [2021-06-05 18:31:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:07,871 INFO L482 AbstractCegarLoop]: Abstraction has 5428 states and 15243 transitions. [2021-06-05 18:31:07,871 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) [2021-06-05 18:31:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 15243 transitions. [2021-06-05 18:31:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:07,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:07,875 INFO L554 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] [2021-06-05 18:31:08,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:08,076 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:08,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1312023765, now seen corresponding path program 480 times [2021-06-05 18:31:08,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:08,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616158541] [2021-06-05 18:31:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:08,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:08,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616158541] [2021-06-05 18:31:08,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616158541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:08,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685307705] [2021-06-05 18:31:08,451 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 [2021-06-05 18:31:08,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:08,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:08,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:08,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:08,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685307705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:08,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:08,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:08,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141471268] [2021-06-05 18:31:08,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:08,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1134, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:08,771 INFO L87 Difference]: Start difference. First operand 5428 states and 15243 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:10,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:10,212 INFO L93 Difference]: Finished difference Result 7146 states and 18882 transitions. [2021-06-05 18:31:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 18:31:10,212 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 [2021-06-05 18:31:10,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:10,220 INFO L225 Difference]: With dead ends: 7146 [2021-06-05 18:31:10,220 INFO L226 Difference]: Without dead ends: 6876 [2021-06-05 18:31:10,221 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 1464.7ms TimeCoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:31:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6876 states. [2021-06-05 18:31:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6876 to 5503. [2021-06-05 18:31:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5503 states, 5502 states have (on average 2.8113413304253) internal successors, (15468), 5502 states have internal predecessors, (15468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5503 states to 5503 states and 15468 transitions. [2021-06-05 18:31:10,295 INFO L78 Accepts]: Start accepts. Automaton has 5503 states and 15468 transitions. Word has length 185 [2021-06-05 18:31:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 5503 states and 15468 transitions. [2021-06-05 18:31:10,295 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) [2021-06-05 18:31:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5503 states and 15468 transitions. [2021-06-05 18:31:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:10,300 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:10,300 INFO L554 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] [2021-06-05 18:31:10,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2021-06-05 18:31:10,501 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash -434011847, now seen corresponding path program 481 times [2021-06-05 18:31:10,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:10,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764670861] [2021-06-05 18:31:10,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:10,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:10,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764670861] [2021-06-05 18:31:10,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764670861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:10,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551304942] [2021-06-05 18:31:10,894 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 [2021-06-05 18:31:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:10,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:11,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551304942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:11,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:11,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:11,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244776683] [2021-06-05 18:31:11,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:11,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:11,174 INFO L87 Difference]: Start difference. First operand 5503 states and 15468 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:12,428 INFO L93 Difference]: Finished difference Result 7171 states and 19007 transitions. [2021-06-05 18:31:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 18:31:12,428 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 [2021-06-05 18:31:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:12,436 INFO L225 Difference]: With dead ends: 7171 [2021-06-05 18:31:12,436 INFO L226 Difference]: Without dead ends: 6901 [2021-06-05 18:31:12,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 1307.4ms TimeCoverageRelationStatistics Valid=2233, Invalid=6323, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 18:31:12,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6901 states. [2021-06-05 18:31:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6901 to 5578. [2021-06-05 18:31:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5578 states, 5577 states have (on average 2.8138784292630445) internal successors, (15693), 5577 states have internal predecessors, (15693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5578 states to 5578 states and 15693 transitions. [2021-06-05 18:31:12,507 INFO L78 Accepts]: Start accepts. Automaton has 5578 states and 15693 transitions. Word has length 185 [2021-06-05 18:31:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:12,507 INFO L482 AbstractCegarLoop]: Abstraction has 5578 states and 15693 transitions. [2021-06-05 18:31:12,507 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) [2021-06-05 18:31:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 5578 states and 15693 transitions. [2021-06-05 18:31:12,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:12,511 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:12,511 INFO L554 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] [2021-06-05 18:31:12,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable489,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:12,712 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1334066647, now seen corresponding path program 482 times [2021-06-05 18:31:12,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:12,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529527512] [2021-06-05 18:31:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:13,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:13,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529527512] [2021-06-05 18:31:13,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529527512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:13,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731228677] [2021-06-05 18:31:13,082 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 [2021-06-05 18:31:13,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:13,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:13,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:13,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731228677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:13,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:13,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511650568] [2021-06-05 18:31:13,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:13,379 INFO L87 Difference]: Start difference. First operand 5578 states and 15693 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:14,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:14,891 INFO L93 Difference]: Finished difference Result 7196 states and 19132 transitions. [2021-06-05 18:31:14,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 18:31:14,892 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 [2021-06-05 18:31:14,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:14,900 INFO L225 Difference]: With dead ends: 7196 [2021-06-05 18:31:14,900 INFO L226 Difference]: Without dead ends: 6926 [2021-06-05 18:31:14,901 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 1527.0ms TimeCoverageRelationStatistics Valid=2273, Invalid=6657, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:31:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6926 states. [2021-06-05 18:31:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6926 to 5653. [2021-06-05 18:31:14,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5653 states, 5652 states have (on average 2.816348195329087) internal successors, (15918), 5652 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5653 states to 5653 states and 15918 transitions. [2021-06-05 18:31:14,976 INFO L78 Accepts]: Start accepts. Automaton has 5653 states and 15918 transitions. Word has length 185 [2021-06-05 18:31:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:14,976 INFO L482 AbstractCegarLoop]: Abstraction has 5653 states and 15918 transitions. [2021-06-05 18:31:14,976 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) [2021-06-05 18:31:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5653 states and 15918 transitions. [2021-06-05 18:31:14,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:14,981 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:14,981 INFO L554 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] [2021-06-05 18:31:15,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable490 [2021-06-05 18:31:15,182 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:15,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:15,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1763130953, now seen corresponding path program 483 times [2021-06-05 18:31:15,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:15,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082745115] [2021-06-05 18:31:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:15,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:15,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082745115] [2021-06-05 18:31:15,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082745115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:15,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860313463] [2021-06-05 18:31:15,540 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 [2021-06-05 18:31:15,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:15,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:15,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860313463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:15,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:15,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:15,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559940144] [2021-06-05 18:31:15,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:15,839 INFO L87 Difference]: Start difference. First operand 5653 states and 15918 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:17,157 INFO L93 Difference]: Finished difference Result 7221 states and 19257 transitions. [2021-06-05 18:31:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 18:31:17,158 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 [2021-06-05 18:31:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:17,165 INFO L225 Difference]: With dead ends: 7221 [2021-06-05 18:31:17,165 INFO L226 Difference]: Without dead ends: 6951 [2021-06-05 18:31:17,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1330.2ms TimeCoverageRelationStatistics Valid=2401, Invalid=6529, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 18:31:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6951 states. [2021-06-05 18:31:17,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6951 to 5728. [2021-06-05 18:31:17,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5728 states, 5727 states have (on average 2.818753273965427) internal successors, (16143), 5727 states have internal predecessors, (16143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:17,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5728 states to 5728 states and 16143 transitions. [2021-06-05 18:31:17,240 INFO L78 Accepts]: Start accepts. Automaton has 5728 states and 16143 transitions. Word has length 185 [2021-06-05 18:31:17,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:17,240 INFO L482 AbstractCegarLoop]: Abstraction has 5728 states and 16143 transitions. [2021-06-05 18:31:17,240 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) [2021-06-05 18:31:17,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5728 states and 16143 transitions. [2021-06-05 18:31:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:17,245 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:17,245 INFO L554 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] [2021-06-05 18:31:17,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:17,445 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1845653159, now seen corresponding path program 484 times [2021-06-05 18:31:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:17,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007136176] [2021-06-05 18:31:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:17,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007136176] [2021-06-05 18:31:17,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007136176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:17,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122256453] [2021-06-05 18:31:17,823 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 [2021-06-05 18:31:17,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:17,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:17,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:18,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:18,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122256453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:18,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:18,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:18,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981219669] [2021-06-05 18:31:18,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:18,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:18,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:18,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:18,124 INFO L87 Difference]: Start difference. First operand 5728 states and 16143 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:19,748 INFO L93 Difference]: Finished difference Result 7246 states and 19382 transitions. [2021-06-05 18:31:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 18:31:19,748 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 [2021-06-05 18:31:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:19,755 INFO L225 Difference]: With dead ends: 7246 [2021-06-05 18:31:19,755 INFO L226 Difference]: Without dead ends: 6976 [2021-06-05 18:31:19,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 1611.6ms TimeCoverageRelationStatistics Valid=2443, Invalid=6869, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:31:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6976 states. [2021-06-05 18:31:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6976 to 5803. [2021-06-05 18:31:19,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5803 states, 5802 states have (on average 2.8210961737331957) internal successors, (16368), 5802 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5803 states to 5803 states and 16368 transitions. [2021-06-05 18:31:19,829 INFO L78 Accepts]: Start accepts. Automaton has 5803 states and 16368 transitions. Word has length 185 [2021-06-05 18:31:19,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:19,829 INFO L482 AbstractCegarLoop]: Abstraction has 5803 states and 16368 transitions. [2021-06-05 18:31:19,829 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) [2021-06-05 18:31:19,829 INFO L276 IsEmpty]: Start isEmpty. Operand 5803 states and 16368 transitions. [2021-06-05 18:31:19,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:19,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:19,834 INFO L554 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] [2021-06-05 18:31:20,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:20,035 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:20,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:20,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1760618421, now seen corresponding path program 485 times [2021-06-05 18:31:20,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:20,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581148646] [2021-06-05 18:31:20,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:20,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:20,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581148646] [2021-06-05 18:31:20,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581148646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:20,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635686731] [2021-06-05 18:31:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:31:20,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-05 18:31:20,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:20,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635686731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:20,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:20,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:20,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770628259] [2021-06-05 18:31:20,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:20,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:20,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:20,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:20,683 INFO L87 Difference]: Start difference. First operand 5803 states and 16368 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:22,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:22,057 INFO L93 Difference]: Finished difference Result 7271 states and 19507 transitions. [2021-06-05 18:31:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 18:31:22,057 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 [2021-06-05 18:31:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:22,065 INFO L225 Difference]: With dead ends: 7271 [2021-06-05 18:31:22,065 INFO L226 Difference]: Without dead ends: 7001 [2021-06-05 18:31:22,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1354.3ms TimeCoverageRelationStatistics Valid=2585, Invalid=6727, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 18:31:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7001 states. [2021-06-05 18:31:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7001 to 5878. [2021-06-05 18:31:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 2.8233792751403777) internal successors, (16593), 5877 states have internal predecessors, (16593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:22,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 16593 transitions. [2021-06-05 18:31:22,142 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 16593 transitions. Word has length 185 [2021-06-05 18:31:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:22,142 INFO L482 AbstractCegarLoop]: Abstraction has 5878 states and 16593 transitions. [2021-06-05 18:31:22,142 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) [2021-06-05 18:31:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 16593 transitions. [2021-06-05 18:31:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:22,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:22,147 INFO L554 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] [2021-06-05 18:31:22,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:22,348 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:22,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:22,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1692467365, now seen corresponding path program 486 times [2021-06-05 18:31:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:22,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36753262] [2021-06-05 18:31:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:22,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:22,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36753262] [2021-06-05 18:31:22,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36753262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:22,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146236930] [2021-06-05 18:31:22,747 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 [2021-06-05 18:31:22,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-05 18:31:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:22,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:23,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146236930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:23,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:23,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:23,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011647480] [2021-06-05 18:31:23,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:23,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:23,059 INFO L87 Difference]: Start difference. First operand 5878 states and 16593 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:24,696 INFO L93 Difference]: Finished difference Result 7296 states and 19632 transitions. [2021-06-05 18:31:24,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 18:31:24,696 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 [2021-06-05 18:31:24,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:24,704 INFO L225 Difference]: With dead ends: 7296 [2021-06-05 18:31:24,705 INFO L226 Difference]: Without dead ends: 7026 [2021-06-05 18:31:24,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2689 ImplicationChecksByTransitivity, 1631.5ms TimeCoverageRelationStatistics Valid=2629, Invalid=7073, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:31:24,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7026 states. [2021-06-05 18:31:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7026 to 5953. [2021-06-05 18:31:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5953 states, 5952 states have (on average 2.8256048387096775) internal successors, (16818), 5952 states have internal predecessors, (16818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 16818 transitions. [2021-06-05 18:31:24,788 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 16818 transitions. Word has length 185 [2021-06-05 18:31:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:24,788 INFO L482 AbstractCegarLoop]: Abstraction has 5953 states and 16818 transitions. [2021-06-05 18:31:24,789 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) [2021-06-05 18:31:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 16818 transitions. [2021-06-05 18:31:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:24,794 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:24,794 INFO L554 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] [2021-06-05 18:31:24,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2021-06-05 18:31:24,994 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:24,995 INFO L82 PathProgramCache]: Analyzing trace with hash 395498291, now seen corresponding path program 487 times [2021-06-05 18:31:24,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:24,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105279280] [2021-06-05 18:31:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:25,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105279280] [2021-06-05 18:31:25,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105279280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:25,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483220476] [2021-06-05 18:31:25,396 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 [2021-06-05 18:31:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:25,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483220476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:25,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:25,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:25,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250145949] [2021-06-05 18:31:25,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:25,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:25,678 INFO L87 Difference]: Start difference. First operand 5953 states and 16818 transitions. Second operand has 36 states, 36 states have (on average 5.138888888888889) internal successors, (185), 36 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:27,073 INFO L93 Difference]: Finished difference Result 7366 states and 19877 transitions. [2021-06-05 18:31:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 18:31:27,073 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 [2021-06-05 18:31:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:27,082 INFO L225 Difference]: With dead ends: 7366 [2021-06-05 18:31:27,082 INFO L226 Difference]: Without dead ends: 7096 [2021-06-05 18:31:27,083 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 1433.1ms TimeCoverageRelationStatistics Valid=2785, Invalid=6917, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 18:31:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-05 18:31:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6028. [2021-06-05 18:31:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.83026381284221) internal successors, (17058), 6027 states have internal predecessors, (17058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:27,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 17058 transitions. [2021-06-05 18:31:27,165 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 17058 transitions. Word has length 185 [2021-06-05 18:31:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:27,165 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 17058 transitions. [2021-06-05 18:31:27,165 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) [2021-06-05 18:31:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 17058 transitions. [2021-06-05 18:31:27,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:27,171 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:27,171 INFO L554 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] [2021-06-05 18:31:27,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:27,371 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:27,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:27,372 INFO L82 PathProgramCache]: Analyzing trace with hash 825251875, now seen corresponding path program 488 times [2021-06-05 18:31:27,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:27,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116146416] [2021-06-05 18:31:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:27,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:27,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116146416] [2021-06-05 18:31:27,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116146416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:27,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880966136] [2021-06-05 18:31:27,745 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 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 [2021-06-05 18:31:27,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:27,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:27,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:27,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880966136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:28,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:28,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:28,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360065729] [2021-06-05 18:31:28,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:28,042 INFO L87 Difference]: Start difference. First operand 6028 states and 17058 transitions. Second operand has 37 states, 37 states have (on average 5.054054054054054) internal successors, (187), 37 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:29,818 INFO L93 Difference]: Finished difference Result 7944 states and 21503 transitions. [2021-06-05 18:31:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 18:31:29,818 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 [2021-06-05 18:31:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:29,827 INFO L225 Difference]: With dead ends: 7944 [2021-06-05 18:31:29,827 INFO L226 Difference]: Without dead ends: 7321 [2021-06-05 18:31:29,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2978 ImplicationChecksByTransitivity, 1737.3ms TimeCoverageRelationStatistics Valid=2852, Invalid=7654, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:31:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7321 states. [2021-06-05 18:31:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7321 to 6103. [2021-06-05 18:31:29,888 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) [2021-06-05 18:31:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6103 states to 6103 states and 17288 transitions. [2021-06-05 18:31:29,897 INFO L78 Accepts]: Start accepts. Automaton has 6103 states and 17288 transitions. Word has length 185 [2021-06-05 18:31:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:29,897 INFO L482 AbstractCegarLoop]: Abstraction has 6103 states and 17288 transitions. [2021-06-05 18:31:29,897 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) [2021-06-05 18:31:29,898 INFO L276 IsEmpty]: Start isEmpty. Operand 6103 states and 17288 transitions. [2021-06-05 18:31:29,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:29,903 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:29,903 INFO L554 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] [2021-06-05 18:31:30,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 18:31:30,103 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 767517745, now seen corresponding path program 489 times [2021-06-05 18:31:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:30,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680156137] [2021-06-05 18:31:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:30,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:30,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680156137] [2021-06-05 18:31:30,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680156137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:30,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091390570] [2021-06-05 18:31:30,473 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 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 [2021-06-05 18:31:30,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-05 18:31:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:30,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:30,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:30,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091390570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:30,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:30,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-06-05 18:31:30,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63986927] [2021-06-05 18:31:30,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 18:31:30,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:30,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 18:31:30,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:31:30,767 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) [2021-06-05 18:31:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:32,218 INFO L93 Difference]: Finished difference Result 8148 states and 22171 transitions. [2021-06-05 18:31:32,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:31:32,219 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 [2021-06-05 18:31:32,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:32,227 INFO L225 Difference]: With dead ends: 8148 [2021-06-05 18:31:32,227 INFO L226 Difference]: Without dead ends: 7878 [2021-06-05 18:31:32,228 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2954 ImplicationChecksByTransitivity, 1452.6ms TimeCoverageRelationStatistics Valid=3002, Invalid=7098, Unknown=0, NotChecked=0, Total=10100 [2021-06-05 18:31:32,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-05 18:31:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 6283. [2021-06-05 18:31:32,292 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) [2021-06-05 18:31:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 17847 transitions. [2021-06-05 18:31:32,302 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 17847 transitions. Word has length 185 [2021-06-05 18:31:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:32,302 INFO L482 AbstractCegarLoop]: Abstraction has 6283 states and 17847 transitions. [2021-06-05 18:31:32,302 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) [2021-06-05 18:31:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 17847 transitions. [2021-06-05 18:31:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-06-05 18:31:32,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:32,306 INFO L554 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] [2021-06-05 18:31:32,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 18:31:32,507 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:32,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash 789860995, now seen corresponding path program 490 times [2021-06-05 18:31:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903236127] [2021-06-05 18:31:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:32,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903236127] [2021-06-05 18:31:32,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903236127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:32,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357488204] [2021-06-05 18:31:32,900 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 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 [2021-06-05 18:31:32,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:32,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 18:31:32,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:33,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 0 proven. 1038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:33,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357488204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:33,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:33,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-06-05 18:31:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154125031] [2021-06-05 18:31:33,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 18:31:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:33,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 18:31:33,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:31:33,198 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) [2021-06-05 18:31:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:34,964 INFO L93 Difference]: Finished difference Result 7610 states and 20821 transitions. [2021-06-05 18:31:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 18:31:34,964 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 [2021-06-05 18:31:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:34,972 INFO L225 Difference]: With dead ends: 7610 [2021-06-05 18:31:34,972 INFO L226 Difference]: Without dead ends: 7121 [2021-06-05 18:31:34,973 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3017 ImplicationChecksByTransitivity, 1747.3ms TimeCoverageRelationStatistics Valid=3052, Invalid=7454, Unknown=0, NotChecked=0, Total=10506 [2021-06-05 18:31:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7121 states. [2021-06-05 18:31:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7121 to 6228. [2021-06-05 18:31:35,032 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) [2021-06-05 18:31:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6228 states to 6228 states and 17683 transitions. [2021-06-05 18:31:35,041 INFO L78 Accepts]: Start accepts. Automaton has 6228 states and 17683 transitions. Word has length 185 [2021-06-05 18:31:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:35,041 INFO L482 AbstractCegarLoop]: Abstraction has 6228 states and 17683 transitions. [2021-06-05 18:31:35,041 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) [2021-06-05 18:31:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 6228 states and 17683 transitions. [2021-06-05 18:31:35,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:35,046 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:35,046 INFO L554 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] [2021-06-05 18:31:35,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 18:31:35,247 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:35,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:35,247 INFO L82 PathProgramCache]: Analyzing trace with hash -719599095, now seen corresponding path program 491 times [2021-06-05 18:31:35,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:35,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256753182] [2021-06-05 18:31:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:35,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256753182] [2021-06-05 18:31:35,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256753182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:35,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001225403] [2021-06-05 18:31:35,784 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 [2021-06-05 18:31:35,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:31:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:35,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 18:31:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001225403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:36,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:36,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 41 [2021-06-05 18:31:36,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97211040] [2021-06-05 18:31:36,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 18:31:36,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:36,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 18:31:36,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1267, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:31:36,189 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) [2021-06-05 18:31:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:37,144 INFO L93 Difference]: Finished difference Result 7668 states and 20883 transitions. [2021-06-05 18:31:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:31:37,145 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 [2021-06-05 18:31:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:37,153 INFO L225 Difference]: With dead ends: 7668 [2021-06-05 18:31:37,154 INFO L226 Difference]: Without dead ends: 7334 [2021-06-05 18:31:37,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 1211.0ms TimeCoverageRelationStatistics Valid=1716, Invalid=4446, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:31:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7334 states. [2021-06-05 18:31:37,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7334 to 6313. [2021-06-05 18:31:37,244 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) [2021-06-05 18:31:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 17853 transitions. [2021-06-05 18:31:37,254 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 17853 transitions. Word has length 190 [2021-06-05 18:31:37,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:37,254 INFO L482 AbstractCegarLoop]: Abstraction has 6313 states and 17853 transitions. [2021-06-05 18:31:37,254 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) [2021-06-05 18:31:37,254 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 17853 transitions. [2021-06-05 18:31:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:37,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:37,260 INFO L554 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] [2021-06-05 18:31:37,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 18:31:37,460 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1353516717, now seen corresponding path program 492 times [2021-06-05 18:31:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:37,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800262866] [2021-06-05 18:31:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:37,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:37,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800262866] [2021-06-05 18:31:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800262866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:37,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714685945] [2021-06-05 18:31:37,931 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 [2021-06-05 18:31:38,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:31:38,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:38,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714685945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:38,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:38,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:38,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785537629] [2021-06-05 18:31:38,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:38,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:38,279 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) [2021-06-05 18:31:39,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:39,066 INFO L93 Difference]: Finished difference Result 9061 states and 23477 transitions. [2021-06-05 18:31:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:31:39,066 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 [2021-06-05 18:31:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:39,076 INFO L225 Difference]: With dead ends: 9061 [2021-06-05 18:31:39,076 INFO L226 Difference]: Without dead ends: 8791 [2021-06-05 18:31:39,077 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1030.0ms TimeCoverageRelationStatistics Valid=1502, Invalid=3754, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 18:31:39,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8791 states. [2021-06-05 18:31:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8791 to 6328. [2021-06-05 18:31:39,145 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) [2021-06-05 18:31:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:39,155 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:39,155 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:39,155 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) [2021-06-05 18:31:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:39,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:39,160 INFO L554 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] [2021-06-05 18:31:39,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:39,361 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:39,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:39,361 INFO L82 PathProgramCache]: Analyzing trace with hash 507224989, now seen corresponding path program 493 times [2021-06-05 18:31:39,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:39,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820468915] [2021-06-05 18:31:39,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:39,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820468915] [2021-06-05 18:31:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820468915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:39,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235204426] [2021-06-05 18:31:39,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:31:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:39,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:39,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:40,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235204426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:40,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:40,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:31:40,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875302292] [2021-06-05 18:31:40,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:31:40,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:40,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:31:40,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1164, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:31:40,244 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) [2021-06-05 18:31:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:41,116 INFO L93 Difference]: Finished difference Result 8946 states and 23247 transitions. [2021-06-05 18:31:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:31:41,116 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 [2021-06-05 18:31:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:41,125 INFO L225 Difference]: With dead ends: 8946 [2021-06-05 18:31:41,125 INFO L226 Difference]: Without dead ends: 8676 [2021-06-05 18:31:41,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1140.6ms TimeCoverageRelationStatistics Valid=1595, Invalid=4257, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:31:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-06-05 18:31:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6328. [2021-06-05 18:31:41,195 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) [2021-06-05 18:31:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:41,205 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:41,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:41,205 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:41,205 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) [2021-06-05 18:31:41,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:41,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:41,210 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:41,210 INFO L554 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] [2021-06-05 18:31:41,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-05 18:31:41,410 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1027331413, now seen corresponding path program 494 times [2021-06-05 18:31:41,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:41,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217181534] [2021-06-05 18:31:41,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:41,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:41,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:41,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217181534] [2021-06-05 18:31:41,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217181534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:41,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526739226] [2021-06-05 18:31:41,871 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 [2021-06-05 18:31:41,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:41,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:42,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526739226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:42,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:42,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:42,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031389386] [2021-06-05 18:31:42,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:42,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:42,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:42,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:42,203 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) [2021-06-05 18:31:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:43,081 INFO L93 Difference]: Finished difference Result 8921 states and 23197 transitions. [2021-06-05 18:31:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:31:43,081 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 [2021-06-05 18:31:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:43,089 INFO L225 Difference]: With dead ends: 8921 [2021-06-05 18:31:43,089 INFO L226 Difference]: Without dead ends: 8651 [2021-06-05 18:31:43,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1082.5ms TimeCoverageRelationStatistics Valid=1494, Invalid=4056, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 18:31:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8651 states. [2021-06-05 18:31:43,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8651 to 6328. [2021-06-05 18:31:43,151 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) [2021-06-05 18:31:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:43,160 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:43,161 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:43,161 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) [2021-06-05 18:31:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:43,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:43,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:43,166 INFO L554 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] [2021-06-05 18:31:43,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable502,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:43,366 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:43,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:43,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1704276891, now seen corresponding path program 495 times [2021-06-05 18:31:43,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:43,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078929736] [2021-06-05 18:31:43,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:43,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078929736] [2021-06-05 18:31:43,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078929736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:43,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48105958] [2021-06-05 18:31:43,841 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 [2021-06-05 18:31:43,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:31:43,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:43,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:43,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48105958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:44,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:44,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:31:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777626160] [2021-06-05 18:31:44,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:31:44,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:31:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:31:44,205 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) [2021-06-05 18:31:45,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:45,156 INFO L93 Difference]: Finished difference Result 8871 states and 23097 transitions. [2021-06-05 18:31:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:31:45,156 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 [2021-06-05 18:31:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:45,165 INFO L225 Difference]: With dead ends: 8871 [2021-06-05 18:31:45,166 INFO L226 Difference]: Without dead ends: 8601 [2021-06-05 18:31:45,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1176.4ms TimeCoverageRelationStatistics Valid=1595, Invalid=4567, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:31:45,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8601 states. [2021-06-05 18:31:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8601 to 6328. [2021-06-05 18:31:45,236 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) [2021-06-05 18:31:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:45,245 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:45,245 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:45,246 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) [2021-06-05 18:31:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:45,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:45,251 INFO L554 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] [2021-06-05 18:31:45,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 18:31:45,451 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:45,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:45,451 INFO L82 PathProgramCache]: Analyzing trace with hash -897936343, now seen corresponding path program 496 times [2021-06-05 18:31:45,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:45,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151167731] [2021-06-05 18:31:45,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:45,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151167731] [2021-06-05 18:31:45,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151167731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:45,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578828048] [2021-06-05 18:31:45,928 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 [2021-06-05 18:31:46,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:46,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:46,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:46,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578828048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:46,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:46,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:46,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603947675] [2021-06-05 18:31:46,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:46,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:46,255 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) [2021-06-05 18:31:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:47,130 INFO L93 Difference]: Finished difference Result 8821 states and 22997 transitions. [2021-06-05 18:31:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:31:47,130 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 [2021-06-05 18:31:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:47,139 INFO L225 Difference]: With dead ends: 8821 [2021-06-05 18:31:47,140 INFO L226 Difference]: Without dead ends: 8551 [2021-06-05 18:31:47,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1111.2ms TimeCoverageRelationStatistics Valid=1502, Invalid=4350, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 18:31:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8551 states. [2021-06-05 18:31:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8551 to 6328. [2021-06-05 18:31:47,215 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) [2021-06-05 18:31:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:47,228 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:47,228 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:47,228 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) [2021-06-05 18:31:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:47,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:47,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:47,234 INFO L554 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] [2021-06-05 18:31:47,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2021-06-05 18:31:47,434 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:47,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1838872295, now seen corresponding path program 497 times [2021-06-05 18:31:47,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:47,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027173866] [2021-06-05 18:31:47,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:47,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:47,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027173866] [2021-06-05 18:31:47,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027173866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:47,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885781716] [2021-06-05 18:31:47,898 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 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 [2021-06-05 18:31:47,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:31:47,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:48,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885781716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:48,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:48,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:31:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959742393] [2021-06-05 18:31:48,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:31:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:31:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:31:48,250 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) [2021-06-05 18:31:49,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:49,285 INFO L93 Difference]: Finished difference Result 8771 states and 22897 transitions. [2021-06-05 18:31:49,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:31:49,285 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 [2021-06-05 18:31:49,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:49,295 INFO L225 Difference]: With dead ends: 8771 [2021-06-05 18:31:49,295 INFO L226 Difference]: Without dead ends: 8501 [2021-06-05 18:31:49,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1269 ImplicationChecksByTransitivity, 1217.7ms TimeCoverageRelationStatistics Valid=1611, Invalid=4869, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:31:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2021-06-05 18:31:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6328. [2021-06-05 18:31:49,365 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) [2021-06-05 18:31:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:49,375 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:49,375 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:49,375 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) [2021-06-05 18:31:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:49,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:49,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:49,380 INFO L554 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] [2021-06-05 18:31:49,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:49,581 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:49,581 INFO L82 PathProgramCache]: Analyzing trace with hash -207543513, now seen corresponding path program 498 times [2021-06-05 18:31:49,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:49,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503241218] [2021-06-05 18:31:49,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:50,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503241218] [2021-06-05 18:31:50,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503241218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:50,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358355631] [2021-06-05 18:31:50,016 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 [2021-06-05 18:31:50,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-05 18:31:50,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:50,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:50,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:50,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:50,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358355631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:50,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:50,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:50,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295949793] [2021-06-05 18:31:50,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:50,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:50,361 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) [2021-06-05 18:31:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:51,326 INFO L93 Difference]: Finished difference Result 8721 states and 22797 transitions. [2021-06-05 18:31:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:31:51,326 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 [2021-06-05 18:31:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:51,333 INFO L225 Difference]: With dead ends: 8721 [2021-06-05 18:31:51,333 INFO L226 Difference]: Without dead ends: 8451 [2021-06-05 18:31:51,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=1526, Invalid=4636, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 18:31:51,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8451 states. [2021-06-05 18:31:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8451 to 6328. [2021-06-05 18:31:51,394 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) [2021-06-05 18:31:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:51,403 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:51,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:51,404 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:51,404 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) [2021-06-05 18:31:51,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:51,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:51,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:51,409 INFO L554 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] [2021-06-05 18:31:51,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 18:31:51,609 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:51,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1053031401, now seen corresponding path program 499 times [2021-06-05 18:31:51,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:51,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732376708] [2021-06-05 18:31:51,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:52,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:52,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732376708] [2021-06-05 18:31:52,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732376708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:52,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031233183] [2021-06-05 18:31:52,056 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 [2021-06-05 18:31:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:52,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031233183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:52,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:52,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:31:52,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308006363] [2021-06-05 18:31:52,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:31:52,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:52,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:31:52,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:31:52,400 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) [2021-06-05 18:31:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:53,479 INFO L93 Difference]: Finished difference Result 8671 states and 22697 transitions. [2021-06-05 18:31:53,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:31:53,480 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 [2021-06-05 18:31:53,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:53,489 INFO L225 Difference]: With dead ends: 8671 [2021-06-05 18:31:53,489 INFO L226 Difference]: Without dead ends: 8401 [2021-06-05 18:31:53,490 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 1258.4ms TimeCoverageRelationStatistics Valid=1643, Invalid=5163, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:31:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8401 states. [2021-06-05 18:31:53,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8401 to 6328. [2021-06-05 18:31:53,556 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) [2021-06-05 18:31:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:53,566 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:53,566 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:53,566 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) [2021-06-05 18:31:53,566 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:53,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:53,571 INFO L554 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] [2021-06-05 18:31:53,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 18:31:53,772 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:53,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:53,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1335932837, now seen corresponding path program 500 times [2021-06-05 18:31:53,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:53,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347089872] [2021-06-05 18:31:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:54,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347089872] [2021-06-05 18:31:54,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347089872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:54,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424003745] [2021-06-05 18:31:54,227 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 [2021-06-05 18:31:54,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:31:54,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:54,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:54,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424003745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:54,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:54,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:54,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847002763] [2021-06-05 18:31:54,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:54,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:54,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:54,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:54,551 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) [2021-06-05 18:31:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:55,536 INFO L93 Difference]: Finished difference Result 8621 states and 22597 transitions. [2021-06-05 18:31:55,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:31:55,536 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 [2021-06-05 18:31:55,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:55,546 INFO L225 Difference]: With dead ends: 8621 [2021-06-05 18:31:55,546 INFO L226 Difference]: Without dead ends: 8351 [2021-06-05 18:31:55,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1177.6ms TimeCoverageRelationStatistics Valid=1566, Invalid=4914, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 18:31:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8351 states. [2021-06-05 18:31:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8351 to 6328. [2021-06-05 18:31:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6328 states, 6327 states have (on average 2.8264580369843526) internal successors, (17883), 6327 states have internal predecessors, (17883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:31:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:55,624 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:55,624 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:55,624 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) [2021-06-05 18:31:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:55,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:55,629 INFO L554 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] [2021-06-05 18:31:55,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:55,830 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:55,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:55,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2075982699, now seen corresponding path program 501 times [2021-06-05 18:31:55,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:55,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594509852] [2021-06-05 18:31:55,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:56,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:56,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594509852] [2021-06-05 18:31:56,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594509852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:56,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529901127] [2021-06-05 18:31:56,268 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 [2021-06-05 18:31:56,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-05 18:31:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:56,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:56,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529901127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:56,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:56,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:31:56,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623216617] [2021-06-05 18:31:56,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:31:56,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:56,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:31:56,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:31:56,628 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) [2021-06-05 18:31:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:57,791 INFO L93 Difference]: Finished difference Result 8571 states and 22497 transitions. [2021-06-05 18:31:57,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 18:31:57,791 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 [2021-06-05 18:31:57,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:57,801 INFO L225 Difference]: With dead ends: 8571 [2021-06-05 18:31:57,801 INFO L226 Difference]: Without dead ends: 8301 [2021-06-05 18:31:57,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1311.5ms TimeCoverageRelationStatistics Valid=1691, Invalid=5449, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 18:31:57,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-05 18:31:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6328. [2021-06-05 18:31:57,869 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) [2021-06-05 18:31:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:57,879 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:57,879 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:57,879 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) [2021-06-05 18:31:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:31:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:31:57,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:31:57,884 INFO L554 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] [2021-06-05 18:31:58,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:31:58,085 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:31:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:31:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash 326775203, now seen corresponding path program 502 times [2021-06-05 18:31:58,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:31:58,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663566034] [2021-06-05 18:31:58,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:31:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:31:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:58,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:31:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663566034] [2021-06-05 18:31:58,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663566034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822816463] [2021-06-05 18:31:58,500 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 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 [2021-06-05 18:31:58,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:31:58,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:31:58,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:31:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:31:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:31:58,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822816463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:31:58,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:31:58,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-06-05 18:31:58,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008782187] [2021-06-05 18:31:58,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 18:31:58,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:31:58,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 18:31:58,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:31:58,825 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) [2021-06-05 18:31:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:31:59,915 INFO L93 Difference]: Finished difference Result 8521 states and 22397 transitions. [2021-06-05 18:31:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 18:31:59,916 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 [2021-06-05 18:31:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:31:59,923 INFO L225 Difference]: With dead ends: 8521 [2021-06-05 18:31:59,923 INFO L226 Difference]: Without dead ends: 8251 [2021-06-05 18:31:59,924 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1202.4ms TimeCoverageRelationStatistics Valid=1622, Invalid=5184, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 18:31:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-06-05 18:31:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 6328. [2021-06-05 18:31:59,986 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) [2021-06-05 18:31:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6328 states to 6328 states and 17883 transitions. [2021-06-05 18:31:59,996 INFO L78 Accepts]: Start accepts. Automaton has 6328 states and 17883 transitions. Word has length 190 [2021-06-05 18:31:59,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:31:59,996 INFO L482 AbstractCegarLoop]: Abstraction has 6328 states and 17883 transitions. [2021-06-05 18:31:59,997 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) [2021-06-05 18:31:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 6328 states and 17883 transitions. [2021-06-05 18:32:00,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-06-05 18:32:00,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:32:00,002 INFO L554 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] [2021-06-05 18:32:00,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-05 18:32:00,202 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:32:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:32:00,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2126845293, now seen corresponding path program 503 times [2021-06-05 18:32:00,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:32:00,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505960128] [2021-06-05 18:32:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:32:00,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:32:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:00,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:32:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505960128] [2021-06-05 18:32:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505960128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:00,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631296121] [2021-06-05 18:32:00,631 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 [2021-06-05 18:32:00,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-05 18:32:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:32:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 18:32:00,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:32:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:32:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631296121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:32:00,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:32:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 39 [2021-06-05 18:32:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249328826] [2021-06-05 18:32:00,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 18:32:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:32:00,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 18:32:00,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:32:00,984 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) Received shutdown request... [2021-06-05 18:32:01,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:32:01,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2021-06-05 18:32:02,000 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:32:02,001 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:32:02,003 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:32:02,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:32:02 BasicIcfg [2021-06-05 18:32:02,003 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:32:02,004 INFO L168 Benchmark]: Toolchain (without parser) took 784085.14 ms. Allocated memory was 350.2 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 312.2 MB in the beginning and 769.9 MB in the end (delta: -457.7 MB). Peak memory consumption was 571.7 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 350.2 MB. Free memory was 330.5 MB in the beginning and 330.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 461.79 ms. Allocated memory is still 350.2 MB. Free memory was 312.0 MB in the beginning and 314.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.03 ms. Allocated memory is still 350.2 MB. Free memory was 314.2 MB in the beginning and 312.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: Boogie Preprocessor took 18.64 ms. Allocated memory is still 350.2 MB. Free memory was 312.1 MB in the beginning and 311.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: RCFGBuilder took 373.61 ms. Allocated memory is still 350.2 MB. Free memory was 311.1 MB in the beginning and 286.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,004 INFO L168 Benchmark]: TraceAbstraction took 783169.58 ms. Allocated memory was 350.2 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 286.9 MB in the beginning and 769.9 MB in the end (delta: -483.0 MB). Peak memory consumption was 549.9 MB. Max. memory is 16.0 GB. [2021-06-05 18:32:02,006 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 350.2 MB. Free memory was 330.5 MB in the beginning and 330.4 MB in the end (delta: 70.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 461.79 ms. Allocated memory is still 350.2 MB. Free memory was 312.0 MB in the beginning and 314.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 54.03 ms. Allocated memory is still 350.2 MB. Free memory was 314.2 MB in the beginning and 312.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.64 ms. Allocated memory is still 350.2 MB. Free memory was 312.1 MB in the beginning and 311.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 373.61 ms. Allocated memory is still 350.2 MB. Free memory was 311.1 MB in the beginning and 286.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 783169.58 ms. Allocated memory was 350.2 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 286.9 MB in the beginning and 769.9 MB in the end (delta: -483.0 MB). Peak memory consumption was 549.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (6328states) and FLOYD_HOARE automaton (currently 36 states, 39 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 70 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 783069.1ms, OverallIterations: 512, TraceHistogramMax: 16, EmptinessCheckTime: 1666.0ms, AutomataDifference: 394687.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 88.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49695 SDtfs, 593898 SDslu, 541604 SDs, 0 SdLazy, 99565 SolverSat, 100947 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64481.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100357 GetRequests, 69321 SyntacticMatches, 0 SemanticMatches, 31035 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514611 ImplicationChecksByTransitivity, 403383.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=6328occurred in iteration=501, InterpolantAutomatonStates: 21729, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24416.9ms AutomataMinimizationTime, 511 MinimizatonAttempts, 618033 StatesRemovedByMinimization, 511 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6368.5ms SsaConstructionTime, 17634.4ms SatisfiabilityAnalysisTime, 218012.1ms InterpolantComputationTime, 138718 NumberOfCodeBlocks, 138718 NumberOfCodeBlocksAsserted, 3828 NumberOfCheckSat, 137700 ConstructedInterpolants, 0 QuantifiedInterpolants, 607650 SizeOfPredicates, 11334 NumberOfNonLiveVariables, 135080 ConjunctsInSsa, 13865 ConjunctsInUnsatCore, 1018 InterpolantComputations, 6 PerfectInterpolantSequences, 1/534804 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