/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-VariableLbe.epf -i ../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-fae578e [2019-12-18 23:19:15,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-18 23:19:15,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-18 23:19:15,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-18 23:19:15,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-18 23:19:15,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-18 23:19:15,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-18 23:19:15,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-18 23:19:15,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-18 23:19:15,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-18 23:19:15,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-18 23:19:15,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-18 23:19:15,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-18 23:19:15,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-18 23:19:15,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-18 23:19:15,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-18 23:19:15,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-18 23:19:15,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-18 23:19:15,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-18 23:19:15,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-18 23:19:15,781 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-18 23:19:15,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-18 23:19:15,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-18 23:19:15,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-18 23:19:15,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-18 23:19:15,792 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-18 23:19:15,792 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-18 23:19:15,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-18 23:19:15,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-18 23:19:15,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-18 23:19:15,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-18 23:19:15,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-18 23:19:15,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-18 23:19:15,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-18 23:19:15,807 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-18 23:19:15,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-18 23:19:15,808 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-18 23:19:15,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-18 23:19:15,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-18 23:19:15,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-18 23:19:15,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-18 23:19:15,813 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-VariableLbe.epf [2019-12-18 23:19:15,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-18 23:19:15,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-18 23:19:15,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-18 23:19:15,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-18 23:19:15,839 INFO L138 SettingsManager]: * Use SBE=true [2019-12-18 23:19:15,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-18 23:19:15,839 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-18 23:19:15,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-18 23:19:15,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-18 23:19:15,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-18 23:19:15,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-18 23:19:15,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-18 23:19:15,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-18 23:19:15,842 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-18 23:19:15,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-18 23:19:15,842 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-18 23:19:15,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-18 23:19:15,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-18 23:19:15,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-18 23:19:15,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-18 23:19:15,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-18 23:19:15,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-18 23:19:15,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-18 23:19:15,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-18 23:19:15,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-18 23:19:15,844 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-18 23:19:15,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-18 23:19:15,845 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2019-12-18 23:19:15,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-18 23:19:15,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-18 23:19:16,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-18 23:19:16,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-18 23:19:16,167 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-18 23:19:16,168 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-18 23:19:16,169 INFO L275 PluginConnector]: CDTParser initialized [2019-12-18 23:19:16,170 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2019-12-18 23:19:16,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49a361242/af0ba7d32e3d40d196cadde3223cc9a8/FLAG805781530 [2019-12-18 23:19:16,747 INFO L306 CDTParser]: Found 1 translation units. [2019-12-18 23:19:16,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2019-12-18 23:19:16,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49a361242/af0ba7d32e3d40d196cadde3223cc9a8/FLAG805781530 [2019-12-18 23:19:17,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49a361242/af0ba7d32e3d40d196cadde3223cc9a8 [2019-12-18 23:19:17,070 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-18 23:19:17,072 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-12-18 23:19:17,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-18 23:19:17,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-18 23:19:17,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-18 23:19:17,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:19:17" (1/1) ... [2019-12-18 23:19:17,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d5173bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:17, skipping insertion in model container [2019-12-18 23:19:17,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 11:19:17" (1/1) ... [2019-12-18 23:19:17,085 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-18 23:19:17,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-18 23:19:17,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:19:17,869 INFO L203 MainTranslator]: Completed pre-run [2019-12-18 23:19:17,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-18 23:19:18,217 INFO L208 MainTranslator]: Completed translation [2019-12-18 23:19:18,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18 WrapperNode [2019-12-18 23:19:18,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-18 23:19:18,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-18 23:19:18,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-18 23:19:18,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-18 23:19:18,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-18 23:19:18,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-18 23:19:18,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-18 23:19:18,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-18 23:19:18,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (1/1) ... [2019-12-18 23:19:18,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-18 23:19:18,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-18 23:19:18,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-18 23:19:18,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-18 23:19:18,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (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 [2019-12-18 23:19:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-18 23:19:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-18 23:19:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-18 23:19:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-18 23:19:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2019-12-18 23:19:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2019-12-18 23:19:18,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2019-12-18 23:19:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-12-18 23:19:18,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-18 23:19:18,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-18 23:19:18,477 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-12-18 23:19:18,894 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-18 23:19:18,894 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-12-18 23:19:18,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:19:18 BoogieIcfgContainer [2019-12-18 23:19:18,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-18 23:19:18,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-18 23:19:18,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-18 23:19:18,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-18 23:19:18,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 11:19:17" (1/3) ... [2019-12-18 23:19:18,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d079d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:19:18, skipping insertion in model container [2019-12-18 23:19:18,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 11:19:18" (2/3) ... [2019-12-18 23:19:18,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d079d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 11:19:18, skipping insertion in model container [2019-12-18 23:19:18,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 11:19:18" (3/3) ... [2019-12-18 23:19:18,903 INFO L109 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2019-12-18 23:19:18,911 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-12-18 23:19:18,912 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-18 23:19:18,917 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-18 23:19:18,918 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-12-18 23:19:18,940 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,941 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,941 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,941 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,941 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,942 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,942 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,942 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,942 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,943 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,943 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,943 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,943 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,944 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,944 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,944 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,944 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,944 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,945 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,945 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,945 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,945 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,946 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,949 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,949 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,950 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~j~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,950 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~post30| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,950 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,950 WARN L315 ript$VariableManager]: TermVariabe thread_function_mutexThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,951 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,951 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet31| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,951 WARN L315 ript$VariableManager]: TermVariabe |thread_function_mutexThread1of1ForFork0_#t~nondet32| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-12-18 23:19:18,979 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-12-18 23:19:19,003 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-18 23:19:19,003 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-18 23:19:19,003 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-18 23:19:19,004 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-18 23:19:19,004 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-18 23:19:19,004 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-18 23:19:19,005 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-18 23:19:19,005 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-18 23:19:19,024 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 81 transitions [2019-12-18 23:19:19,026 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions [2019-12-18 23:19:19,077 INFO L126 PetriNetUnfolder]: 7/80 cut-off events. [2019-12-18 23:19:19,077 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 23:19:19,083 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs. 6/78 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-18 23:19:19,086 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 78 places, 81 transitions [2019-12-18 23:19:19,109 INFO L126 PetriNetUnfolder]: 7/80 cut-off events. [2019-12-18 23:19:19,109 INFO L127 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-12-18 23:19:19,110 INFO L76 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 80 events. 7/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 79 event pairs. 6/78 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2019-12-18 23:19:19,112 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 646 [2019-12-18 23:19:19,114 INFO L182 etLargeBlockEncoding]: Variable Check. [2019-12-18 23:19:21,252 WARN L192 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2019-12-18 23:19:21,395 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2019-12-18 23:19:21,933 WARN L192 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 110 [2019-12-18 23:19:22,175 WARN L192 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2019-12-18 23:19:22,191 INFO L206 etLargeBlockEncoding]: Checked pairs total: 738 [2019-12-18 23:19:22,191 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2019-12-18 23:19:22,195 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions [2019-12-18 23:19:22,204 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-12-18 23:19:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-12-18 23:19:22,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-18 23:19:22,213 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:22,214 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:22,215 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:22,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:22,221 INFO L82 PathProgramCache]: Analyzing trace with hash 805989659, now seen corresponding path program 1 times [2019-12-18 23:19:22,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:22,231 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796419036] [2019-12-18 23:19:22,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:22,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:22,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796419036] [2019-12-18 23:19:22,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:19:22,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 23:19:22,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64496773] [2019-12-18 23:19:22,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 23:19:22,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 23:19:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,443 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-12-18 23:19:22,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:22,478 INFO L93 Difference]: Finished difference Result 52 states and 100 transitions. [2019-12-18 23:19:22,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 23:19:22,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-12-18 23:19:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:22,492 INFO L225 Difference]: With dead ends: 52 [2019-12-18 23:19:22,492 INFO L226 Difference]: Without dead ends: 52 [2019-12-18 23:19:22,494 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-12-18 23:19:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2019-12-18 23:19:22,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 23:19:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 76 transitions. [2019-12-18 23:19:22,528 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 76 transitions. Word has length 8 [2019-12-18 23:19:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:22,528 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 76 transitions. [2019-12-18 23:19:22,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 23:19:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 76 transitions. [2019-12-18 23:19:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-18 23:19:22,529 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:22,530 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:22,530 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:22,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:22,530 INFO L82 PathProgramCache]: Analyzing trace with hash -627855235, now seen corresponding path program 1 times [2019-12-18 23:19:22,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:22,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374334258] [2019-12-18 23:19:22,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:22,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:22,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374334258] [2019-12-18 23:19:22,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:19:22,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 23:19:22,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929196650] [2019-12-18 23:19:22,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 23:19:22,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 23:19:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,602 INFO L87 Difference]: Start difference. First operand 40 states and 76 transitions. Second operand 3 states. [2019-12-18 23:19:22,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:22,624 INFO L93 Difference]: Finished difference Result 64 states and 124 transitions. [2019-12-18 23:19:22,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 23:19:22,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-12-18 23:19:22,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:22,626 INFO L225 Difference]: With dead ends: 64 [2019-12-18 23:19:22,626 INFO L226 Difference]: Without dead ends: 64 [2019-12-18 23:19:22,627 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-12-18 23:19:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2019-12-18 23:19:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-12-18 23:19:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 88 transitions. [2019-12-18 23:19:22,641 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 88 transitions. Word has length 11 [2019-12-18 23:19:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:22,643 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 88 transitions. [2019-12-18 23:19:22,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 23:19:22,643 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 88 transitions. [2019-12-18 23:19:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 23:19:22,645 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:22,645 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:22,646 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:22,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:22,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1126061903, now seen corresponding path program 1 times [2019-12-18 23:19:22,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:22,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330715163] [2019-12-18 23:19:22,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:22,735 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330715163] [2019-12-18 23:19:22,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-18 23:19:22,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-18 23:19:22,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322914116] [2019-12-18 23:19:22,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-18 23:19:22,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-18 23:19:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,738 INFO L87 Difference]: Start difference. First operand 46 states and 88 transitions. Second operand 3 states. [2019-12-18 23:19:22,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:22,755 INFO L93 Difference]: Finished difference Result 40 states and 66 transitions. [2019-12-18 23:19:22,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-18 23:19:22,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-12-18 23:19:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:22,756 INFO L225 Difference]: With dead ends: 40 [2019-12-18 23:19:22,756 INFO L226 Difference]: Without dead ends: 40 [2019-12-18 23:19:22,757 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-18 23:19:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-12-18 23:19:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-12-18 23:19:22,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-12-18 23:19:22,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 66 transitions. [2019-12-18 23:19:22,763 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 66 transitions. Word has length 15 [2019-12-18 23:19:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:22,763 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 66 transitions. [2019-12-18 23:19:22,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-18 23:19:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 66 transitions. [2019-12-18 23:19:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-18 23:19:22,764 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:22,764 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:22,765 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -688630981, now seen corresponding path program 2 times [2019-12-18 23:19:22,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:22,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583866181] [2019-12-18 23:19:22,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:22,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:22,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583866181] [2019-12-18 23:19:22,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822743409] [2019-12-18 23:19:22,849 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:22,929 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:22,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:22,932 INFO L264 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-18 23:19:22,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:22,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:22,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-12-18 23:19:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952543500] [2019-12-18 23:19:22,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-18 23:19:22,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-18 23:19:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:19:22,970 INFO L87 Difference]: Start difference. First operand 40 states and 66 transitions. Second operand 5 states. [2019-12-18 23:19:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:23,005 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2019-12-18 23:19:23,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-18 23:19:23,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-12-18 23:19:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:23,007 INFO L225 Difference]: With dead ends: 70 [2019-12-18 23:19:23,008 INFO L226 Difference]: Without dead ends: 70 [2019-12-18 23:19:23,008 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-12-18 23:19:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-12-18 23:19:23,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2019-12-18 23:19:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-12-18 23:19:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2019-12-18 23:19:23,016 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 15 [2019-12-18 23:19:23,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:23,016 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2019-12-18 23:19:23,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-18 23:19:23,016 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2019-12-18 23:19:23,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-12-18 23:19:23,017 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:23,018 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:23,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:23,231 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:23,232 INFO L82 PathProgramCache]: Analyzing trace with hash -181679987, now seen corresponding path program 3 times [2019-12-18 23:19:23,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:23,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861692081] [2019-12-18 23:19:23,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:23,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:23,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861692081] [2019-12-18 23:19:23,300 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363740329] [2019-12-18 23:19:23,300 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:23,375 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-18 23:19:23,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:23,377 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-18 23:19:23,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-12-18 23:19:23,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:23,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-12-18 23:19:23,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156055201] [2019-12-18 23:19:23,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 23:19:23,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 23:19:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:19:23,401 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 7 states. [2019-12-18 23:19:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:23,602 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2019-12-18 23:19:23,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:19:23,605 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-12-18 23:19:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:23,607 INFO L225 Difference]: With dead ends: 130 [2019-12-18 23:19:23,607 INFO L226 Difference]: Without dead ends: 130 [2019-12-18 23:19:23,607 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:19:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-12-18 23:19:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2019-12-18 23:19:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-12-18 23:19:23,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 159 transitions. [2019-12-18 23:19:23,632 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 159 transitions. Word has length 19 [2019-12-18 23:19:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:23,632 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 159 transitions. [2019-12-18 23:19:23,632 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 23:19:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 159 transitions. [2019-12-18 23:19:23,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-12-18 23:19:23,635 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:23,637 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:23,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:23,838 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:23,838 INFO L82 PathProgramCache]: Analyzing trace with hash 941314767, now seen corresponding path program 4 times [2019-12-18 23:19:23,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:23,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982316043] [2019-12-18 23:19:23,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 23:19:23,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982316043] [2019-12-18 23:19:23,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934081271] [2019-12-18 23:19:23,936 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:19:23,998 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:19:23,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:24,000 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-18 23:19:24,001 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:24,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 23:19:24,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:24,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-12-18 23:19:24,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187301039] [2019-12-18 23:19:24,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-18 23:19:24,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:24,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-18 23:19:24,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:19:24,023 INFO L87 Difference]: Start difference. First operand 103 states and 159 transitions. Second operand 7 states. [2019-12-18 23:19:24,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:24,067 INFO L93 Difference]: Finished difference Result 142 states and 215 transitions. [2019-12-18 23:19:24,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-18 23:19:24,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-12-18 23:19:24,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:24,069 INFO L225 Difference]: With dead ends: 142 [2019-12-18 23:19:24,071 INFO L226 Difference]: Without dead ends: 142 [2019-12-18 23:19:24,071 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-12-18 23:19:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-12-18 23:19:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2019-12-18 23:19:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-12-18 23:19:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 194 transitions. [2019-12-18 23:19:24,081 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 194 transitions. Word has length 26 [2019-12-18 23:19:24,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:24,081 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 194 transitions. [2019-12-18 23:19:24,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-18 23:19:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 194 transitions. [2019-12-18 23:19:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-12-18 23:19:24,083 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:24,083 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:24,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:24,294 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:24,294 INFO L82 PathProgramCache]: Analyzing trace with hash 760955681, now seen corresponding path program 5 times [2019-12-18 23:19:24,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:24,295 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368537556] [2019-12-18 23:19:24,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 23:19:24,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368537556] [2019-12-18 23:19:24,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275094200] [2019-12-18 23:19:24,430 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:24,497 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-12-18 23:19:24,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:24,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-18 23:19:24,501 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:24,519 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 23:19:24,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:24,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-12-18 23:19:24,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881245932] [2019-12-18 23:19:24,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-18 23:19:24,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:24,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-18 23:19:24,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:19:24,521 INFO L87 Difference]: Start difference. First operand 127 states and 194 transitions. Second operand 8 states. [2019-12-18 23:19:24,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:24,562 INFO L93 Difference]: Finished difference Result 166 states and 250 transitions. [2019-12-18 23:19:24,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-18 23:19:24,563 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-12-18 23:19:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:24,564 INFO L225 Difference]: With dead ends: 166 [2019-12-18 23:19:24,564 INFO L226 Difference]: Without dead ends: 166 [2019-12-18 23:19:24,565 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-12-18 23:19:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-12-18 23:19:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 151. [2019-12-18 23:19:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-12-18 23:19:24,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 229 transitions. [2019-12-18 23:19:24,575 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 229 transitions. Word has length 30 [2019-12-18 23:19:24,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:24,575 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 229 transitions. [2019-12-18 23:19:24,576 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-18 23:19:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 229 transitions. [2019-12-18 23:19:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-12-18 23:19:24,577 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:24,577 INFO L411 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:24,781 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:24,781 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:24,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:24,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1515799949, now seen corresponding path program 6 times [2019-12-18 23:19:24,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:24,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451797302] [2019-12-18 23:19:24,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-18 23:19:24,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451797302] [2019-12-18 23:19:24,911 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540386520] [2019-12-18 23:19:24,911 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:19:25,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-12-18 23:19:25,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:25,046 INFO L264 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-18 23:19:25,048 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-12-18 23:19:25,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:25,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-12-18 23:19:25,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136920746] [2019-12-18 23:19:25,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 23:19:25,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 23:19:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:19:25,109 INFO L87 Difference]: Start difference. First operand 151 states and 229 transitions. Second operand 11 states. [2019-12-18 23:19:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:25,543 INFO L93 Difference]: Finished difference Result 256 states and 368 transitions. [2019-12-18 23:19:25,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-12-18 23:19:25,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2019-12-18 23:19:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:25,545 INFO L225 Difference]: With dead ends: 256 [2019-12-18 23:19:25,545 INFO L226 Difference]: Without dead ends: 256 [2019-12-18 23:19:25,546 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2019-12-18 23:19:25,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2019-12-18 23:19:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 220. [2019-12-18 23:19:25,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2019-12-18 23:19:25,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 322 transitions. [2019-12-18 23:19:25,557 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 322 transitions. Word has length 34 [2019-12-18 23:19:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:25,557 INFO L462 AbstractCegarLoop]: Abstraction has 220 states and 322 transitions. [2019-12-18 23:19:25,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 23:19:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 322 transitions. [2019-12-18 23:19:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-12-18 23:19:25,559 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:25,559 INFO L411 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:25,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:25,763 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:25,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:25,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1789615391, now seen corresponding path program 7 times [2019-12-18 23:19:25,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:25,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296785432] [2019-12-18 23:19:25,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:25,860 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 23:19:25,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296785432] [2019-12-18 23:19:25,860 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115791511] [2019-12-18 23:19:25,861 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:19:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:25,935 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 23:19:25,937 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 23:19:25,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:25,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-12-18 23:19:25,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060782800] [2019-12-18 23:19:25,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-18 23:19:25,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-18 23:19:25,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:19:25,954 INFO L87 Difference]: Start difference. First operand 220 states and 322 transitions. Second operand 10 states. [2019-12-18 23:19:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:26,004 INFO L93 Difference]: Finished difference Result 268 states and 388 transitions. [2019-12-18 23:19:26,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-18 23:19:26,005 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2019-12-18 23:19:26,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:26,007 INFO L225 Difference]: With dead ends: 268 [2019-12-18 23:19:26,010 INFO L226 Difference]: Without dead ends: 268 [2019-12-18 23:19:26,011 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-12-18 23:19:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-12-18 23:19:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 250. [2019-12-18 23:19:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-12-18 23:19:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 364 transitions. [2019-12-18 23:19:26,029 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 364 transitions. Word has length 41 [2019-12-18 23:19:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:26,029 INFO L462 AbstractCegarLoop]: Abstraction has 250 states and 364 transitions. [2019-12-18 23:19:26,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-18 23:19:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 364 transitions. [2019-12-18 23:19:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-12-18 23:19:26,033 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:26,034 INFO L411 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:26,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:26,238 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:26,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1883668109, now seen corresponding path program 8 times [2019-12-18 23:19:26,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:26,238 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010832968] [2019-12-18 23:19:26,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 23:19:26,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010832968] [2019-12-18 23:19:26,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436630353] [2019-12-18 23:19:26,378 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:26,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:26,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:26,461 INFO L264 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:19:26,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 23:19:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:26,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 23:19:26,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570934955] [2019-12-18 23:19:26,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 23:19:26,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 23:19:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:19:26,485 INFO L87 Difference]: Start difference. First operand 250 states and 364 transitions. Second operand 11 states. [2019-12-18 23:19:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:26,541 INFO L93 Difference]: Finished difference Result 298 states and 430 transitions. [2019-12-18 23:19:26,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:19:26,541 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2019-12-18 23:19:26,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:26,544 INFO L225 Difference]: With dead ends: 298 [2019-12-18 23:19:26,544 INFO L226 Difference]: Without dead ends: 298 [2019-12-18 23:19:26,544 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:19:26,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-12-18 23:19:26,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 280. [2019-12-18 23:19:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-12-18 23:19:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 406 transitions. [2019-12-18 23:19:26,552 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 406 transitions. Word has length 45 [2019-12-18 23:19:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:26,554 INFO L462 AbstractCegarLoop]: Abstraction has 280 states and 406 transitions. [2019-12-18 23:19:26,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 23:19:26,555 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 406 transitions. [2019-12-18 23:19:26,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-12-18 23:19:26,557 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:26,557 INFO L411 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:26,760 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:26,761 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:26,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:26,761 INFO L82 PathProgramCache]: Analyzing trace with hash 125253883, now seen corresponding path program 9 times [2019-12-18 23:19:26,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:26,762 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167278694] [2019-12-18 23:19:26,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-12-18 23:19:26,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167278694] [2019-12-18 23:19:26,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176245526] [2019-12-18 23:19:26,868 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:26,942 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-12-18 23:19:26,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:26,943 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-18 23:19:26,946 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-12-18 23:19:26,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:26,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-12-18 23:19:26,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657819772] [2019-12-18 23:19:26,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:19:26,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:19:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:19:26,995 INFO L87 Difference]: Start difference. First operand 280 states and 406 transitions. Second operand 15 states. [2019-12-18 23:19:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:27,795 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2019-12-18 23:19:27,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-12-18 23:19:27,797 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2019-12-18 23:19:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:27,799 INFO L225 Difference]: With dead ends: 418 [2019-12-18 23:19:27,800 INFO L226 Difference]: Without dead ends: 418 [2019-12-18 23:19:27,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=825, Invalid=1725, Unknown=0, NotChecked=0, Total=2550 [2019-12-18 23:19:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-12-18 23:19:27,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 373. [2019-12-18 23:19:27,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2019-12-18 23:19:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 527 transitions. [2019-12-18 23:19:27,811 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 527 transitions. Word has length 49 [2019-12-18 23:19:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:27,812 INFO L462 AbstractCegarLoop]: Abstraction has 373 states and 527 transitions. [2019-12-18 23:19:27,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:19:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 527 transitions. [2019-12-18 23:19:27,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-12-18 23:19:27,813 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:27,813 INFO L411 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:28,017 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:28,018 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:28,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1053149445, now seen corresponding path program 10 times [2019-12-18 23:19:28,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:28,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883410576] [2019-12-18 23:19:28,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:28,137 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 10 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 23:19:28,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883410576] [2019-12-18 23:19:28,138 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623688323] [2019-12-18 23:19:28,138 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:19:28,247 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:19:28,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:28,249 INFO L264 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:19:28,252 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 10 proven. 153 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 23:19:28,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:28,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 23:19:28,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729219801] [2019-12-18 23:19:28,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 23:19:28,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:28,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 23:19:28,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:19:28,275 INFO L87 Difference]: Start difference. First operand 373 states and 527 transitions. Second operand 13 states. [2019-12-18 23:19:28,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:28,331 INFO L93 Difference]: Finished difference Result 430 states and 603 transitions. [2019-12-18 23:19:28,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:19:28,332 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2019-12-18 23:19:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:28,334 INFO L225 Difference]: With dead ends: 430 [2019-12-18 23:19:28,334 INFO L226 Difference]: Without dead ends: 430 [2019-12-18 23:19:28,335 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:19:28,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-12-18 23:19:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 409. [2019-12-18 23:19:28,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2019-12-18 23:19:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 576 transitions. [2019-12-18 23:19:28,345 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 576 transitions. Word has length 56 [2019-12-18 23:19:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:28,345 INFO L462 AbstractCegarLoop]: Abstraction has 409 states and 576 transitions. [2019-12-18 23:19:28,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 23:19:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 576 transitions. [2019-12-18 23:19:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-12-18 23:19:28,347 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:28,347 INFO L411 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:28,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:28,551 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:28,552 INFO L82 PathProgramCache]: Analyzing trace with hash 746998733, now seen corresponding path program 11 times [2019-12-18 23:19:28,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:28,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076681476] [2019-12-18 23:19:28,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 23:19:28,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076681476] [2019-12-18 23:19:28,728 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338242973] [2019-12-18 23:19:28,729 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:28,831 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-12-18 23:19:28,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:28,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:19:28,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 10 proven. 190 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 23:19:28,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:28,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 23:19:28,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886202465] [2019-12-18 23:19:28,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:19:28,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:28,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:19:28,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:19:28,871 INFO L87 Difference]: Start difference. First operand 409 states and 576 transitions. Second operand 14 states. [2019-12-18 23:19:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:28,933 INFO L93 Difference]: Finished difference Result 466 states and 652 transitions. [2019-12-18 23:19:28,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:19:28,934 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2019-12-18 23:19:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:28,937 INFO L225 Difference]: With dead ends: 466 [2019-12-18 23:19:28,937 INFO L226 Difference]: Without dead ends: 466 [2019-12-18 23:19:28,937 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:19:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2019-12-18 23:19:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 445. [2019-12-18 23:19:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-12-18 23:19:28,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 625 transitions. [2019-12-18 23:19:28,947 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 625 transitions. Word has length 60 [2019-12-18 23:19:28,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:28,948 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 625 transitions. [2019-12-18 23:19:28,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:19:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 625 transitions. [2019-12-18 23:19:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-12-18 23:19:28,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:28,949 INFO L411 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:29,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:29,154 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:29,154 INFO L82 PathProgramCache]: Analyzing trace with hash 926394271, now seen corresponding path program 12 times [2019-12-18 23:19:29,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:29,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409499684] [2019-12-18 23:19:29,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 10 proven. 231 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-12-18 23:19:29,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409499684] [2019-12-18 23:19:29,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2851] [2019-12-18 23:19:29,307 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:19:29,410 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-12-18 23:19:29,411 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:29,412 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-18 23:19:29,414 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-12-18 23:19:29,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:29,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-12-18 23:19:29,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068625658] [2019-12-18 23:19:29,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:19:29,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:19:29,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:19:29,486 INFO L87 Difference]: Start difference. First operand 445 states and 625 transitions. Second operand 19 states. [2019-12-18 23:19:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:30,928 INFO L93 Difference]: Finished difference Result 616 states and 838 transitions. [2019-12-18 23:19:30,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-12-18 23:19:30,929 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2019-12-18 23:19:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:30,932 INFO L225 Difference]: With dead ends: 616 [2019-12-18 23:19:30,932 INFO L226 Difference]: Without dead ends: 616 [2019-12-18 23:19:30,935 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1911, Invalid=4251, Unknown=0, NotChecked=0, Total=6162 [2019-12-18 23:19:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-12-18 23:19:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 562. [2019-12-18 23:19:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-12-18 23:19:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 774 transitions. [2019-12-18 23:19:30,947 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 774 transitions. Word has length 64 [2019-12-18 23:19:30,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:30,947 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 774 transitions. [2019-12-18 23:19:30,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:19:30,947 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 774 transitions. [2019-12-18 23:19:30,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-12-18 23:19:30,949 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:30,949 INFO L411 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:31,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:31,153 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:31,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:31,153 INFO L82 PathProgramCache]: Analyzing trace with hash 2037603315, now seen corresponding path program 13 times [2019-12-18 23:19:31,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:31,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065344371] [2019-12-18 23:19:31,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 276 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 23:19:31,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065344371] [2019-12-18 23:19:31,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548481271] [2019-12-18 23:19:31,327 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:19:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:31,458 INFO L264 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:19:31,460 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 13 proven. 276 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 23:19:31,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:31,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 23:19:31,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853998227] [2019-12-18 23:19:31,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:19:31,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:19:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:19:31,490 INFO L87 Difference]: Start difference. First operand 562 states and 774 transitions. Second operand 16 states. [2019-12-18 23:19:31,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:31,551 INFO L93 Difference]: Finished difference Result 628 states and 860 transitions. [2019-12-18 23:19:31,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:19:31,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2019-12-18 23:19:31,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:31,554 INFO L225 Difference]: With dead ends: 628 [2019-12-18 23:19:31,554 INFO L226 Difference]: Without dead ends: 628 [2019-12-18 23:19:31,555 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:19:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-12-18 23:19:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 604. [2019-12-18 23:19:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-12-18 23:19:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 830 transitions. [2019-12-18 23:19:31,566 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 830 transitions. Word has length 71 [2019-12-18 23:19:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:31,566 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 830 transitions. [2019-12-18 23:19:31,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:19:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 830 transitions. [2019-12-18 23:19:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-12-18 23:19:31,568 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:31,568 INFO L411 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:31,772 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:31,772 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -73086751, now seen corresponding path program 14 times [2019-12-18 23:19:31,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:31,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769016568] [2019-12-18 23:19:31,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 13 proven. 325 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 23:19:31,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769016568] [2019-12-18 23:19:31,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600801775] [2019-12-18 23:19:31,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:32,040 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:32,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:32,042 INFO L264 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:19:32,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 13 proven. 325 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 23:19:32,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:32,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 23:19:32,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987322664] [2019-12-18 23:19:32,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 23:19:32,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 23:19:32,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:19:32,064 INFO L87 Difference]: Start difference. First operand 604 states and 830 transitions. Second operand 17 states. [2019-12-18 23:19:32,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:32,147 INFO L93 Difference]: Finished difference Result 670 states and 916 transitions. [2019-12-18 23:19:32,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:19:32,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2019-12-18 23:19:32,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:32,151 INFO L225 Difference]: With dead ends: 670 [2019-12-18 23:19:32,151 INFO L226 Difference]: Without dead ends: 670 [2019-12-18 23:19:32,151 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:19:32,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2019-12-18 23:19:32,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 646. [2019-12-18 23:19:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646 states. [2019-12-18 23:19:32,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 886 transitions. [2019-12-18 23:19:32,163 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 886 transitions. Word has length 75 [2019-12-18 23:19:32,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:32,164 INFO L462 AbstractCegarLoop]: Abstraction has 646 states and 886 transitions. [2019-12-18 23:19:32,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 23:19:32,164 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 886 transitions. [2019-12-18 23:19:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-12-18 23:19:32,165 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:32,166 INFO L411 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:32,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:32,369 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:32,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash -61206833, now seen corresponding path program 15 times [2019-12-18 23:19:32,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:32,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193739872] [2019-12-18 23:19:32,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:32,551 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 13 proven. 378 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-12-18 23:19:32,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193739872] [2019-12-18 23:19:32,551 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659931615] [2019-12-18 23:19:32,552 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:32,651 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-12-18 23:19:32,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:32,653 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-18 23:19:32,655 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2019-12-18 23:19:32,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:32,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2019-12-18 23:19:32,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397694436] [2019-12-18 23:19:32,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:19:32,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:32,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:19:32,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:19:32,760 INFO L87 Difference]: Start difference. First operand 646 states and 886 transitions. Second operand 23 states. [2019-12-18 23:19:35,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:35,764 INFO L93 Difference]: Finished difference Result 850 states and 1136 transitions. [2019-12-18 23:19:35,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2019-12-18 23:19:35,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 79 [2019-12-18 23:19:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:35,772 INFO L225 Difference]: With dead ends: 850 [2019-12-18 23:19:35,773 INFO L226 Difference]: Without dead ends: 850 [2019-12-18 23:19:35,781 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4089 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3808, Invalid=8848, Unknown=0, NotChecked=0, Total=12656 [2019-12-18 23:19:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2019-12-18 23:19:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 787. [2019-12-18 23:19:35,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 787 states. [2019-12-18 23:19:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1063 transitions. [2019-12-18 23:19:35,801 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1063 transitions. Word has length 79 [2019-12-18 23:19:35,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:35,802 INFO L462 AbstractCegarLoop]: Abstraction has 787 states and 1063 transitions. [2019-12-18 23:19:35,802 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:19:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1063 transitions. [2019-12-18 23:19:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-12-18 23:19:35,805 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:35,806 INFO L411 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:36,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:36,012 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:36,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:36,012 INFO L82 PathProgramCache]: Analyzing trace with hash 943400231, now seen corresponding path program 16 times [2019-12-18 23:19:36,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:36,016 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962028028] [2019-12-18 23:19:36,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 16 proven. 435 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 23:19:36,366 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962028028] [2019-12-18 23:19:36,367 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259757028] [2019-12-18 23:19:36,388 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:19:36,745 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:19:36,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:36,747 INFO L264 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 23:19:36,749 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:36,772 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 16 proven. 435 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 23:19:36,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:36,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 23:19:36,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146218554] [2019-12-18 23:19:36,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:19:36,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:19:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:19:36,774 INFO L87 Difference]: Start difference. First operand 787 states and 1063 transitions. Second operand 19 states. [2019-12-18 23:19:36,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:36,854 INFO L93 Difference]: Finished difference Result 862 states and 1159 transitions. [2019-12-18 23:19:36,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:19:36,855 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2019-12-18 23:19:36,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:36,859 INFO L225 Difference]: With dead ends: 862 [2019-12-18 23:19:36,859 INFO L226 Difference]: Without dead ends: 862 [2019-12-18 23:19:36,859 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:19:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2019-12-18 23:19:36,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 835. [2019-12-18 23:19:36,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 835 states. [2019-12-18 23:19:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1126 transitions. [2019-12-18 23:19:36,879 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1126 transitions. Word has length 86 [2019-12-18 23:19:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:36,879 INFO L462 AbstractCegarLoop]: Abstraction has 835 states and 1126 transitions. [2019-12-18 23:19:36,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:19:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1126 transitions. [2019-12-18 23:19:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-12-18 23:19:36,882 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:36,882 INFO L411 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:37,087 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:37,088 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:37,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:37,088 INFO L82 PathProgramCache]: Analyzing trace with hash 757104249, now seen corresponding path program 17 times [2019-12-18 23:19:37,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:37,088 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855804517] [2019-12-18 23:19:37,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 16 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 23:19:37,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855804517] [2019-12-18 23:19:37,318 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562259024] [2019-12-18 23:19:37,318 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:37,443 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-12-18 23:19:37,443 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:37,445 INFO L264 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:19:37,446 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 16 proven. 496 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 23:19:37,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:37,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 23:19:37,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464312556] [2019-12-18 23:19:37,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:19:37,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:37,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:19:37,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:19:37,496 INFO L87 Difference]: Start difference. First operand 835 states and 1126 transitions. Second operand 20 states. [2019-12-18 23:19:37,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:37,595 INFO L93 Difference]: Finished difference Result 910 states and 1222 transitions. [2019-12-18 23:19:37,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:19:37,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 90 [2019-12-18 23:19:37,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:37,600 INFO L225 Difference]: With dead ends: 910 [2019-12-18 23:19:37,600 INFO L226 Difference]: Without dead ends: 910 [2019-12-18 23:19:37,601 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:19:37,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2019-12-18 23:19:37,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 883. [2019-12-18 23:19:37,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2019-12-18 23:19:37,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1189 transitions. [2019-12-18 23:19:37,617 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1189 transitions. Word has length 90 [2019-12-18 23:19:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:37,618 INFO L462 AbstractCegarLoop]: Abstraction has 883 states and 1189 transitions. [2019-12-18 23:19:37,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:19:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1189 transitions. [2019-12-18 23:19:37,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-12-18 23:19:37,622 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:37,622 INFO L411 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:37,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:37,828 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 305454795, now seen corresponding path program 18 times [2019-12-18 23:19:37,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:37,829 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189391574] [2019-12-18 23:19:37,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 16 proven. 561 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-12-18 23:19:38,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189391574] [2019-12-18 23:19:38,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616200489] [2019-12-18 23:19:38,105 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:19:38,287 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-12-18 23:19:38,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:38,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-18 23:19:38,291 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-12-18 23:19:38,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:38,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 27 [2019-12-18 23:19:38,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599779907] [2019-12-18 23:19:38,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-12-18 23:19:38,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:38,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-12-18 23:19:38,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2019-12-18 23:19:38,454 INFO L87 Difference]: Start difference. First operand 883 states and 1189 transitions. Second operand 27 states. [2019-12-18 23:19:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:42,756 INFO L93 Difference]: Finished difference Result 1120 states and 1476 transitions. [2019-12-18 23:19:42,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2019-12-18 23:19:42,761 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 94 [2019-12-18 23:19:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:42,766 INFO L225 Difference]: With dead ends: 1120 [2019-12-18 23:19:42,766 INFO L226 Difference]: Without dead ends: 1120 [2019-12-18 23:19:42,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7994 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6840, Invalid=16416, Unknown=0, NotChecked=0, Total=23256 [2019-12-18 23:19:42,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-12-18 23:19:42,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1048. [2019-12-18 23:19:42,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1048 states. [2019-12-18 23:19:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1394 transitions. [2019-12-18 23:19:42,796 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1394 transitions. Word has length 94 [2019-12-18 23:19:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:42,796 INFO L462 AbstractCegarLoop]: Abstraction has 1048 states and 1394 transitions. [2019-12-18 23:19:42,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-12-18 23:19:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1394 transitions. [2019-12-18 23:19:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-12-18 23:19:42,801 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:42,801 INFO L411 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:43,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:43,006 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash 804368583, now seen corresponding path program 19 times [2019-12-18 23:19:43,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:43,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607580188] [2019-12-18 23:19:43,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 19 proven. 630 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 23:19:43,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607580188] [2019-12-18 23:19:43,285 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948175117] [2019-12-18 23:19:43,285 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:19:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:43,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 23:19:43,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 19 proven. 630 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 23:19:43,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:43,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 23:19:43,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670547920] [2019-12-18 23:19:43,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:19:43,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:19:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:19:43,420 INFO L87 Difference]: Start difference. First operand 1048 states and 1394 transitions. Second operand 22 states. [2019-12-18 23:19:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:43,495 INFO L93 Difference]: Finished difference Result 1132 states and 1500 transitions. [2019-12-18 23:19:43,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:19:43,496 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2019-12-18 23:19:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:43,502 INFO L225 Difference]: With dead ends: 1132 [2019-12-18 23:19:43,502 INFO L226 Difference]: Without dead ends: 1132 [2019-12-18 23:19:43,503 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:19:43,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2019-12-18 23:19:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1102. [2019-12-18 23:19:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2019-12-18 23:19:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1464 transitions. [2019-12-18 23:19:43,523 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1464 transitions. Word has length 101 [2019-12-18 23:19:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:43,523 INFO L462 AbstractCegarLoop]: Abstraction has 1102 states and 1464 transitions. [2019-12-18 23:19:43,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:19:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1464 transitions. [2019-12-18 23:19:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-12-18 23:19:43,527 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:43,527 INFO L411 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:43,730 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:43,731 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:43,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:43,731 INFO L82 PathProgramCache]: Analyzing trace with hash 726157621, now seen corresponding path program 20 times [2019-12-18 23:19:43,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:43,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272188024] [2019-12-18 23:19:43,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:44,149 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 703 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 23:19:44,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272188024] [2019-12-18 23:19:44,149 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438331497] [2019-12-18 23:19:44,150 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:44,268 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:44,268 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:44,270 INFO L264 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 23:19:44,272 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 773 backedges. 19 proven. 703 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-12-18 23:19:44,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:44,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 23:19:44,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904063515] [2019-12-18 23:19:44,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:19:44,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:44,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:19:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:19:44,305 INFO L87 Difference]: Start difference. First operand 1102 states and 1464 transitions. Second operand 23 states. [2019-12-18 23:19:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:44,415 INFO L93 Difference]: Finished difference Result 1156 states and 1534 transitions. [2019-12-18 23:19:44,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 23:19:44,416 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-12-18 23:19:44,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:44,420 INFO L225 Difference]: With dead ends: 1156 [2019-12-18 23:19:44,420 INFO L226 Difference]: Without dead ends: 1156 [2019-12-18 23:19:44,421 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:19:44,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2019-12-18 23:19:44,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 1156. [2019-12-18 23:19:44,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1156 states. [2019-12-18 23:19:44,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1534 transitions. [2019-12-18 23:19:44,441 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1534 transitions. Word has length 105 [2019-12-18 23:19:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:44,441 INFO L462 AbstractCegarLoop]: Abstraction has 1156 states and 1534 transitions. [2019-12-18 23:19:44,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:19:44,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1534 transitions. [2019-12-18 23:19:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-12-18 23:19:44,444 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:44,444 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:44,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:44,649 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -274662749, now seen corresponding path program 21 times [2019-12-18 23:19:44,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:44,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411264360] [2019-12-18 23:19:44,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:44,782 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411264360] [2019-12-18 23:19:44,783 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177570780] [2019-12-18 23:19:44,783 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:44,906 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-12-18 23:19:44,906 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:44,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-18 23:19:44,908 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:44,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:44,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-12-18 23:19:44,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992295180] [2019-12-18 23:19:44,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-12-18 23:19:44,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:44,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-18 23:19:44,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:19:44,929 INFO L87 Difference]: Start difference. First operand 1156 states and 1534 transitions. Second operand 11 states. [2019-12-18 23:19:44,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:44,986 INFO L93 Difference]: Finished difference Result 1331 states and 1740 transitions. [2019-12-18 23:19:44,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-18 23:19:44,986 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 109 [2019-12-18 23:19:44,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:44,990 INFO L225 Difference]: With dead ends: 1331 [2019-12-18 23:19:44,990 INFO L226 Difference]: Without dead ends: 1331 [2019-12-18 23:19:44,990 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-12-18 23:19:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-12-18 23:19:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1285. [2019-12-18 23:19:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1285 states. [2019-12-18 23:19:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 1690 transitions. [2019-12-18 23:19:45,009 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 1690 transitions. Word has length 109 [2019-12-18 23:19:45,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:45,010 INFO L462 AbstractCegarLoop]: Abstraction has 1285 states and 1690 transitions. [2019-12-18 23:19:45,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-12-18 23:19:45,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 1690 transitions. [2019-12-18 23:19:45,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-12-18 23:19:45,014 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:45,014 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:45,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:45,217 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:45,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1538398591, now seen corresponding path program 22 times [2019-12-18 23:19:45,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:45,218 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133738926] [2019-12-18 23:19:45,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:45,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133738926] [2019-12-18 23:19:45,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935323971] [2019-12-18 23:19:45,362 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:19:45,859 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:19:45,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:45,862 INFO L264 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-18 23:19:45,863 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:45,909 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:45,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:45,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-12-18 23:19:45,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487705097] [2019-12-18 23:19:45,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-12-18 23:19:45,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-18 23:19:45,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:19:45,910 INFO L87 Difference]: Start difference. First operand 1285 states and 1690 transitions. Second operand 12 states. [2019-12-18 23:19:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:45,973 INFO L93 Difference]: Finished difference Result 1460 states and 1896 transitions. [2019-12-18 23:19:45,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-18 23:19:45,973 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 112 [2019-12-18 23:19:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:45,977 INFO L225 Difference]: With dead ends: 1460 [2019-12-18 23:19:45,977 INFO L226 Difference]: Without dead ends: 1460 [2019-12-18 23:19:45,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-12-18 23:19:45,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2019-12-18 23:19:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1414. [2019-12-18 23:19:45,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1414 states. [2019-12-18 23:19:45,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1846 transitions. [2019-12-18 23:19:45,998 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1846 transitions. Word has length 112 [2019-12-18 23:19:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:45,998 INFO L462 AbstractCegarLoop]: Abstraction has 1414 states and 1846 transitions. [2019-12-18 23:19:45,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-12-18 23:19:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1846 transitions. [2019-12-18 23:19:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-12-18 23:19:46,002 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:46,002 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:46,206 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:46,207 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 190449123, now seen corresponding path program 23 times [2019-12-18 23:19:46,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:46,207 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691852216] [2019-12-18 23:19:46,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:46,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:46,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691852216] [2019-12-18 23:19:46,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275825535] [2019-12-18 23:19:46,360 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:46,666 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 23:19:46,667 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:46,669 INFO L264 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-18 23:19:46,672 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:46,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:46,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-12-18 23:19:46,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338488660] [2019-12-18 23:19:46,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-18 23:19:46,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-18 23:19:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:19:46,701 INFO L87 Difference]: Start difference. First operand 1414 states and 1846 transitions. Second operand 13 states. [2019-12-18 23:19:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:46,758 INFO L93 Difference]: Finished difference Result 1589 states and 2052 transitions. [2019-12-18 23:19:46,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-18 23:19:46,759 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 115 [2019-12-18 23:19:46,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:46,765 INFO L225 Difference]: With dead ends: 1589 [2019-12-18 23:19:46,765 INFO L226 Difference]: Without dead ends: 1589 [2019-12-18 23:19:46,765 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-12-18 23:19:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2019-12-18 23:19:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1543. [2019-12-18 23:19:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1543 states. [2019-12-18 23:19:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2002 transitions. [2019-12-18 23:19:46,791 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2002 transitions. Word has length 115 [2019-12-18 23:19:46,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:46,792 INFO L462 AbstractCegarLoop]: Abstraction has 1543 states and 2002 transitions. [2019-12-18 23:19:46,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-18 23:19:46,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2002 transitions. [2019-12-18 23:19:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-12-18 23:19:46,797 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:46,797 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:47,002 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:47,002 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:47,003 INFO L82 PathProgramCache]: Analyzing trace with hash -955116735, now seen corresponding path program 24 times [2019-12-18 23:19:47,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:47,003 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203625210] [2019-12-18 23:19:47,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:47,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203625210] [2019-12-18 23:19:47,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549464165] [2019-12-18 23:19:47,181 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:19:47,642 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-12-18 23:19:47,643 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:47,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-18 23:19:47,646 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:47,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:47,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-12-18 23:19:47,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479670989] [2019-12-18 23:19:47,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-12-18 23:19:47,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-12-18 23:19:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:19:47,665 INFO L87 Difference]: Start difference. First operand 1543 states and 2002 transitions. Second operand 14 states. [2019-12-18 23:19:47,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:47,740 INFO L93 Difference]: Finished difference Result 1718 states and 2208 transitions. [2019-12-18 23:19:47,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-12-18 23:19:47,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 118 [2019-12-18 23:19:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:47,745 INFO L225 Difference]: With dead ends: 1718 [2019-12-18 23:19:47,745 INFO L226 Difference]: Without dead ends: 1718 [2019-12-18 23:19:47,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-12-18 23:19:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2019-12-18 23:19:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1672. [2019-12-18 23:19:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-12-18 23:19:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2158 transitions. [2019-12-18 23:19:47,769 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2158 transitions. Word has length 118 [2019-12-18 23:19:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:47,770 INFO L462 AbstractCegarLoop]: Abstraction has 1672 states and 2158 transitions. [2019-12-18 23:19:47,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-12-18 23:19:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2158 transitions. [2019-12-18 23:19:47,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-12-18 23:19:47,774 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:47,774 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:47,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:47,979 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:47,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:47,979 INFO L82 PathProgramCache]: Analyzing trace with hash -697458397, now seen corresponding path program 25 times [2019-12-18 23:19:47,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:47,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812751043] [2019-12-18 23:19:47,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:48,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812751043] [2019-12-18 23:19:48,176 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010615734] [2019-12-18 23:19:48,176 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:19:48,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:48,342 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 13 conjunts are in the unsatisfiable core [2019-12-18 23:19:48,344 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:48,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:48,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-12-18 23:19:48,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694761180] [2019-12-18 23:19:48,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-12-18 23:19:48,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:48,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-12-18 23:19:48,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:19:48,374 INFO L87 Difference]: Start difference. First operand 1672 states and 2158 transitions. Second operand 15 states. [2019-12-18 23:19:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:48,460 INFO L93 Difference]: Finished difference Result 1847 states and 2364 transitions. [2019-12-18 23:19:48,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-12-18 23:19:48,460 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 121 [2019-12-18 23:19:48,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:48,467 INFO L225 Difference]: With dead ends: 1847 [2019-12-18 23:19:48,467 INFO L226 Difference]: Without dead ends: 1847 [2019-12-18 23:19:48,468 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-12-18 23:19:48,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2019-12-18 23:19:48,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1801. [2019-12-18 23:19:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1801 states. [2019-12-18 23:19:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1801 states to 1801 states and 2314 transitions. [2019-12-18 23:19:48,495 INFO L78 Accepts]: Start accepts. Automaton has 1801 states and 2314 transitions. Word has length 121 [2019-12-18 23:19:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:48,495 INFO L462 AbstractCegarLoop]: Abstraction has 1801 states and 2314 transitions. [2019-12-18 23:19:48,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-12-18 23:19:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1801 states and 2314 transitions. [2019-12-18 23:19:48,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-12-18 23:19:48,500 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:48,501 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:48,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:48,705 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:48,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:48,705 INFO L82 PathProgramCache]: Analyzing trace with hash 95531009, now seen corresponding path program 26 times [2019-12-18 23:19:48,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:48,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032223803] [2019-12-18 23:19:48,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:48,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:48,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032223803] [2019-12-18 23:19:48,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004131361] [2019-12-18 23:19:48,882 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:48,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:48,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:48,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 14 conjunts are in the unsatisfiable core [2019-12-18 23:19:49,002 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:49,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:49,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-12-18 23:19:49,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426416002] [2019-12-18 23:19:49,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-12-18 23:19:49,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-12-18 23:19:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:19:49,033 INFO L87 Difference]: Start difference. First operand 1801 states and 2314 transitions. Second operand 16 states. [2019-12-18 23:19:49,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:49,071 INFO L93 Difference]: Finished difference Result 1976 states and 2520 transitions. [2019-12-18 23:19:49,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-12-18 23:19:49,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 124 [2019-12-18 23:19:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:49,077 INFO L225 Difference]: With dead ends: 1976 [2019-12-18 23:19:49,077 INFO L226 Difference]: Without dead ends: 1976 [2019-12-18 23:19:49,078 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-12-18 23:19:49,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2019-12-18 23:19:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1930. [2019-12-18 23:19:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1930 states. [2019-12-18 23:19:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2470 transitions. [2019-12-18 23:19:49,100 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2470 transitions. Word has length 124 [2019-12-18 23:19:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:49,100 INFO L462 AbstractCegarLoop]: Abstraction has 1930 states and 2470 transitions. [2019-12-18 23:19:49,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-12-18 23:19:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2470 transitions. [2019-12-18 23:19:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-12-18 23:19:49,105 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:49,105 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:49,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:49,309 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1722797155, now seen corresponding path program 27 times [2019-12-18 23:19:49,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:49,309 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578957342] [2019-12-18 23:19:49,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:49,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578957342] [2019-12-18 23:19:49,575 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032123821] [2019-12-18 23:19:49,575 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:50,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-12-18 23:19:50,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:50,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 15 conjunts are in the unsatisfiable core [2019-12-18 23:19:50,023 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:50,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:50,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-12-18 23:19:50,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185088546] [2019-12-18 23:19:50,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-12-18 23:19:50,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:50,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-12-18 23:19:50,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:19:50,062 INFO L87 Difference]: Start difference. First operand 1930 states and 2470 transitions. Second operand 17 states. [2019-12-18 23:19:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:50,144 INFO L93 Difference]: Finished difference Result 2105 states and 2676 transitions. [2019-12-18 23:19:50,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-12-18 23:19:50,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 127 [2019-12-18 23:19:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:50,153 INFO L225 Difference]: With dead ends: 2105 [2019-12-18 23:19:50,154 INFO L226 Difference]: Without dead ends: 2105 [2019-12-18 23:19:50,155 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-12-18 23:19:50,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2019-12-18 23:19:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 2059. [2019-12-18 23:19:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2059 states. [2019-12-18 23:19:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 2626 transitions. [2019-12-18 23:19:50,186 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 2626 transitions. Word has length 127 [2019-12-18 23:19:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:50,186 INFO L462 AbstractCegarLoop]: Abstraction has 2059 states and 2626 transitions. [2019-12-18 23:19:50,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-12-18 23:19:50,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 2626 transitions. [2019-12-18 23:19:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-12-18 23:19:50,192 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:50,192 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:50,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:50,397 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:50,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:50,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1982284607, now seen corresponding path program 28 times [2019-12-18 23:19:50,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:50,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844070806] [2019-12-18 23:19:50,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:50,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:50,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844070806] [2019-12-18 23:19:50,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049685242] [2019-12-18 23:19:50,641 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:19:51,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:19:51,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:51,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-18 23:19:51,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1067 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:51,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:51,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-12-18 23:19:51,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098718525] [2019-12-18 23:19:51,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-12-18 23:19:51,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-12-18 23:19:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:19:51,699 INFO L87 Difference]: Start difference. First operand 2059 states and 2626 transitions. Second operand 18 states. [2019-12-18 23:19:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:51,771 INFO L93 Difference]: Finished difference Result 2234 states and 2832 transitions. [2019-12-18 23:19:51,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-12-18 23:19:51,771 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 130 [2019-12-18 23:19:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:51,780 INFO L225 Difference]: With dead ends: 2234 [2019-12-18 23:19:51,780 INFO L226 Difference]: Without dead ends: 2234 [2019-12-18 23:19:51,783 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-12-18 23:19:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2234 states. [2019-12-18 23:19:51,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2234 to 2188. [2019-12-18 23:19:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2188 states. [2019-12-18 23:19:51,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 2782 transitions. [2019-12-18 23:19:51,814 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 2782 transitions. Word has length 130 [2019-12-18 23:19:51,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:51,815 INFO L462 AbstractCegarLoop]: Abstraction has 2188 states and 2782 transitions. [2019-12-18 23:19:51,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-12-18 23:19:51,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 2782 transitions. [2019-12-18 23:19:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-12-18 23:19:51,821 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:51,821 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:52,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:52,029 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:52,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:52,030 INFO L82 PathProgramCache]: Analyzing trace with hash 586450851, now seen corresponding path program 29 times [2019-12-18 23:19:52,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:52,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295683580] [2019-12-18 23:19:52,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:52,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295683580] [2019-12-18 23:19:52,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918712734] [2019-12-18 23:19:52,381 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:52,802 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 23:19:52,802 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:52,805 INFO L264 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 17 conjunts are in the unsatisfiable core [2019-12-18 23:19:52,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:52,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:52,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-12-18 23:19:52,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351232718] [2019-12-18 23:19:52,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-12-18 23:19:52,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:52,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-12-18 23:19:52,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:19:52,851 INFO L87 Difference]: Start difference. First operand 2188 states and 2782 transitions. Second operand 19 states. [2019-12-18 23:19:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:52,955 INFO L93 Difference]: Finished difference Result 2363 states and 2988 transitions. [2019-12-18 23:19:52,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-12-18 23:19:52,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 133 [2019-12-18 23:19:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:52,973 INFO L225 Difference]: With dead ends: 2363 [2019-12-18 23:19:52,973 INFO L226 Difference]: Without dead ends: 2363 [2019-12-18 23:19:52,979 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-12-18 23:19:52,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-12-18 23:19:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2317. [2019-12-18 23:19:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2019-12-18 23:19:53,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 2938 transitions. [2019-12-18 23:19:53,009 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 2938 transitions. Word has length 133 [2019-12-18 23:19:53,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:53,010 INFO L462 AbstractCegarLoop]: Abstraction has 2317 states and 2938 transitions. [2019-12-18 23:19:53,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-12-18 23:19:53,010 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 2938 transitions. [2019-12-18 23:19:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-12-18 23:19:53,016 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:53,016 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:53,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:53,221 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1942799999, now seen corresponding path program 30 times [2019-12-18 23:19:53,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:53,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903220833] [2019-12-18 23:19:53,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:53,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903220833] [2019-12-18 23:19:53,550 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578888795] [2019-12-18 23:19:53,550 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:19:54,174 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-18 23:19:54,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:54,177 INFO L264 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-18 23:19:54,181 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:54,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:54,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:54,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-12-18 23:19:54,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266731429] [2019-12-18 23:19:54,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-12-18 23:19:54,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:54,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-12-18 23:19:54,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:19:54,215 INFO L87 Difference]: Start difference. First operand 2317 states and 2938 transitions. Second operand 20 states. [2019-12-18 23:19:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:54,286 INFO L93 Difference]: Finished difference Result 2492 states and 3144 transitions. [2019-12-18 23:19:54,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-12-18 23:19:54,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2019-12-18 23:19:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:54,291 INFO L225 Difference]: With dead ends: 2492 [2019-12-18 23:19:54,291 INFO L226 Difference]: Without dead ends: 2492 [2019-12-18 23:19:54,292 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-12-18 23:19:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2019-12-18 23:19:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2446. [2019-12-18 23:19:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2019-12-18 23:19:54,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3094 transitions. [2019-12-18 23:19:54,323 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3094 transitions. Word has length 136 [2019-12-18 23:19:54,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:54,324 INFO L462 AbstractCegarLoop]: Abstraction has 2446 states and 3094 transitions. [2019-12-18 23:19:54,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-12-18 23:19:54,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3094 transitions. [2019-12-18 23:19:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-12-18 23:19:54,329 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:54,329 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:54,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:54,534 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash 51368675, now seen corresponding path program 31 times [2019-12-18 23:19:54,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:54,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811692940] [2019-12-18 23:19:54,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:54,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811692940] [2019-12-18 23:19:54,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109923786] [2019-12-18 23:19:54,797 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-12-18 23:19:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:54,919 INFO L264 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-18 23:19:54,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1205 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:54,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:54,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-12-18 23:19:54,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761825625] [2019-12-18 23:19:54,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-12-18 23:19:54,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:54,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-12-18 23:19:54,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:19:54,951 INFO L87 Difference]: Start difference. First operand 2446 states and 3094 transitions. Second operand 21 states. [2019-12-18 23:19:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:55,048 INFO L93 Difference]: Finished difference Result 2621 states and 3300 transitions. [2019-12-18 23:19:55,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-12-18 23:19:55,048 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2019-12-18 23:19:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:55,052 INFO L225 Difference]: With dead ends: 2621 [2019-12-18 23:19:55,052 INFO L226 Difference]: Without dead ends: 2621 [2019-12-18 23:19:55,053 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-12-18 23:19:55,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2019-12-18 23:19:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2575. [2019-12-18 23:19:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2575 states. [2019-12-18 23:19:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3250 transitions. [2019-12-18 23:19:55,083 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3250 transitions. Word has length 139 [2019-12-18 23:19:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:55,083 INFO L462 AbstractCegarLoop]: Abstraction has 2575 states and 3250 transitions. [2019-12-18 23:19:55,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-12-18 23:19:55,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3250 transitions. [2019-12-18 23:19:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-12-18 23:19:55,089 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:55,089 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:55,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:55,293 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash 342697537, now seen corresponding path program 32 times [2019-12-18 23:19:55,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:55,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504187807] [2019-12-18 23:19:55,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:55,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504187807] [2019-12-18 23:19:55,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416019920] [2019-12-18 23:19:55,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-12-18 23:19:55,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-18 23:19:55,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:55,797 INFO L264 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 20 conjunts are in the unsatisfiable core [2019-12-18 23:19:55,800 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:55,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:55,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-12-18 23:19:55,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992272349] [2019-12-18 23:19:55,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-12-18 23:19:55,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-12-18 23:19:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:19:55,831 INFO L87 Difference]: Start difference. First operand 2575 states and 3250 transitions. Second operand 22 states. [2019-12-18 23:19:55,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:55,924 INFO L93 Difference]: Finished difference Result 2750 states and 3456 transitions. [2019-12-18 23:19:55,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-12-18 23:19:55,924 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 142 [2019-12-18 23:19:55,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:55,929 INFO L225 Difference]: With dead ends: 2750 [2019-12-18 23:19:55,929 INFO L226 Difference]: Without dead ends: 2750 [2019-12-18 23:19:55,929 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-12-18 23:19:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2019-12-18 23:19:55,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 2704. [2019-12-18 23:19:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2704 states. [2019-12-18 23:19:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3406 transitions. [2019-12-18 23:19:55,960 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3406 transitions. Word has length 142 [2019-12-18 23:19:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:55,960 INFO L462 AbstractCegarLoop]: Abstraction has 2704 states and 3406 transitions. [2019-12-18 23:19:55,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-12-18 23:19:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3406 transitions. [2019-12-18 23:19:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-12-18 23:19:55,965 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:55,966 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:56,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:56,169 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:56,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:56,170 INFO L82 PathProgramCache]: Analyzing trace with hash -808079837, now seen corresponding path program 33 times [2019-12-18 23:19:56,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:56,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791832732] [2019-12-18 23:19:56,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:56,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791832732] [2019-12-18 23:19:56,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410536735] [2019-12-18 23:19:56,474 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-12-18 23:19:56,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-12-18 23:19:56,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:19:56,872 INFO L264 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-18 23:19:56,874 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:19:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1312 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2019-12-18 23:19:56,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:19:56,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-12-18 23:19:56,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088035091] [2019-12-18 23:19:56,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-12-18 23:19:56,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:19:56,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-12-18 23:19:56,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:19:56,923 INFO L87 Difference]: Start difference. First operand 2704 states and 3406 transitions. Second operand 23 states. [2019-12-18 23:19:57,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:19:57,059 INFO L93 Difference]: Finished difference Result 2833 states and 3562 transitions. [2019-12-18 23:19:57,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-12-18 23:19:57,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 145 [2019-12-18 23:19:57,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:19:57,064 INFO L225 Difference]: With dead ends: 2833 [2019-12-18 23:19:57,064 INFO L226 Difference]: Without dead ends: 2833 [2019-12-18 23:19:57,065 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-12-18 23:19:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-12-18 23:19:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2833. [2019-12-18 23:19:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2833 states. [2019-12-18 23:19:57,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2833 states to 2833 states and 3562 transitions. [2019-12-18 23:19:57,096 INFO L78 Accepts]: Start accepts. Automaton has 2833 states and 3562 transitions. Word has length 145 [2019-12-18 23:19:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:19:57,097 INFO L462 AbstractCegarLoop]: Abstraction has 2833 states and 3562 transitions. [2019-12-18 23:19:57,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-12-18 23:19:57,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2833 states and 3562 transitions. [2019-12-18 23:19:57,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 23:19:57,102 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:19:57,102 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:19:57,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:19:57,307 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:19:57,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:19:57,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1187871999, now seen corresponding path program 34 times [2019-12-18 23:19:57,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:19:57,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476754804] [2019-12-18 23:19:57,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:19:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:19:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:19:59,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476754804] [2019-12-18 23:19:59,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224179636] [2019-12-18 23:19:59,629 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-12-18 23:20:01,615 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-12-18 23:20:01,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:20:01,622 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 23:20:01,627 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:20:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:20:01,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:20:01,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 23:20:01,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365146440] [2019-12-18 23:20:01,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 23:20:01,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:20:01,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 23:20:01,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 23:20:01,718 INFO L87 Difference]: Start difference. First operand 2833 states and 3562 transitions. Second operand 63 states. [2019-12-18 23:21:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:21:13,657 INFO L93 Difference]: Finished difference Result 32926 states and 45933 transitions. [2019-12-18 23:21:13,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 633 states. [2019-12-18 23:21:13,657 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2019-12-18 23:21:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:21:13,739 INFO L225 Difference]: With dead ends: 32926 [2019-12-18 23:21:13,739 INFO L226 Difference]: Without dead ends: 32924 [2019-12-18 23:21:13,759 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 632 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162735 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=2407, Invalid=398915, Unknown=0, NotChecked=0, Total=401322 [2019-12-18 23:21:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32924 states. [2019-12-18 23:21:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32924 to 2967. [2019-12-18 23:21:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2967 states. [2019-12-18 23:21:13,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 3794 transitions. [2019-12-18 23:21:13,921 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 3794 transitions. Word has length 148 [2019-12-18 23:21:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:21:13,921 INFO L462 AbstractCegarLoop]: Abstraction has 2967 states and 3794 transitions. [2019-12-18 23:21:13,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-18 23:21:13,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 3794 transitions. [2019-12-18 23:21:13,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 23:21:13,926 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:21:13,927 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:21:14,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:21:14,133 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:21:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:21:14,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1530624017, now seen corresponding path program 35 times [2019-12-18 23:21:14,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:21:14,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735504434] [2019-12-18 23:21:14,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:21:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:21:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:21:16,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735504434] [2019-12-18 23:21:16,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697441651] [2019-12-18 23:21:16,445 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-12-18 23:21:16,731 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-12-18 23:21:16,731 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:21:16,735 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 23:21:16,739 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:21:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:21:16,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:21:16,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 23:21:16,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290804282] [2019-12-18 23:21:16,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 23:21:16,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:21:16,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 23:21:16,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 23:21:16,801 INFO L87 Difference]: Start difference. First operand 2967 states and 3794 transitions. Second operand 63 states. [2019-12-18 23:21:54,234 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2019-12-18 23:22:26,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-18 23:22:26,481 INFO L93 Difference]: Finished difference Result 30945 states and 43173 transitions. [2019-12-18 23:22:26,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2019-12-18 23:22:26,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 148 [2019-12-18 23:22:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-18 23:22:26,507 INFO L225 Difference]: With dead ends: 30945 [2019-12-18 23:22:26,507 INFO L226 Difference]: Without dead ends: 30943 [2019-12-18 23:22:26,514 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151525 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=2327, Invalid=374055, Unknown=0, NotChecked=0, Total=376382 [2019-12-18 23:22:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30943 states. [2019-12-18 23:22:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30943 to 2973. [2019-12-18 23:22:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2973 states. [2019-12-18 23:22:26,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3801 transitions. [2019-12-18 23:22:26,678 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3801 transitions. Word has length 148 [2019-12-18 23:22:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-18 23:22:26,679 INFO L462 AbstractCegarLoop]: Abstraction has 2973 states and 3801 transitions. [2019-12-18 23:22:26,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-12-18 23:22:26,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3801 transitions. [2019-12-18 23:22:26,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-12-18 23:22:26,685 INFO L403 BasicCegarLoop]: Found error trace [2019-12-18 23:22:26,685 INFO L411 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-18 23:22:26,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:22:26,891 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-18 23:22:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-18 23:22:26,891 INFO L82 PathProgramCache]: Analyzing trace with hash -298559039, now seen corresponding path program 36 times [2019-12-18 23:22:26,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-18 23:22:26,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292198135] [2019-12-18 23:22:26,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-18 23:22:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-18 23:22:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:22:28,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292198135] [2019-12-18 23:22:28,974 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876501854] [2019-12-18 23:22:28,974 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-12-18 23:22:29,472 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2019-12-18 23:22:29,472 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-18 23:22:29,477 INFO L264 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 163 conjunts are in the unsatisfiable core [2019-12-18 23:22:29,479 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-18 23:22:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-18 23:22:29,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-18 23:22:29,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2019-12-18 23:22:29,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162239962] [2019-12-18 23:22:29,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-12-18 23:22:29,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-18 23:22:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-12-18 23:22:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-12-18 23:22:29,527 INFO L87 Difference]: Start difference. First operand 2973 states and 3801 transitions. Second operand 63 states. Received shutdown request... [2019-12-18 23:23:21,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 460 states. [2019-12-18 23:23:21,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-18 23:23:21,307 WARN L527 AbstractCegarLoop]: Verification canceled [2019-12-18 23:23:21,312 WARN L227 ceAbstractionStarter]: Timeout [2019-12-18 23:23:21,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 11:23:21 BasicIcfg [2019-12-18 23:23:21,313 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-18 23:23:21,314 INFO L168 Benchmark]: Toolchain (without parser) took 244243.03 ms. Allocated memory was 143.1 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 97.0 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 222.9 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,314 INFO L168 Benchmark]: CDTParser took 0.44 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,315 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1145.63 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 96.6 MB in the beginning and 104.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,315 INFO L168 Benchmark]: Boogie Procedure Inliner took 103.59 ms. Allocated memory is still 200.8 MB. Free memory was 104.9 MB in the beginning and 102.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,316 INFO L168 Benchmark]: Boogie Preprocessor took 67.02 ms. Allocated memory is still 200.8 MB. Free memory was 102.1 MB in the beginning and 100.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,316 INFO L168 Benchmark]: RCFGBuilder took 504.95 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 100.0 MB in the beginning and 192.4 MB in the end (delta: -92.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,317 INFO L168 Benchmark]: TraceAbstraction took 242416.68 ms. Allocated memory was 230.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 192.4 MB in the beginning and 1.2 GB in the end (delta: -989.8 MB). Peak memory consumption was 231.2 MB. Max. memory is 7.1 GB. [2019-12-18 23:23:21,318 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.44 ms. Allocated memory is still 143.1 MB. Free memory was 118.2 MB in the beginning and 118.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1145.63 ms. Allocated memory was 143.1 MB in the beginning and 200.8 MB in the end (delta: 57.7 MB). Free memory was 96.6 MB in the beginning and 104.9 MB in the end (delta: -8.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 103.59 ms. Allocated memory is still 200.8 MB. Free memory was 104.9 MB in the beginning and 102.1 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 67.02 ms. Allocated memory is still 200.8 MB. Free memory was 102.1 MB in the beginning and 100.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 504.95 ms. Allocated memory was 200.8 MB in the beginning and 230.2 MB in the end (delta: 29.4 MB). Free memory was 100.0 MB in the beginning and 192.4 MB in the end (delta: -92.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 242416.68 ms. Allocated memory was 230.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 192.4 MB in the beginning and 1.2 GB in the end (delta: -989.8 MB). Peak memory consumption was 231.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 3.1s, 78 ProgramPointsBefore, 18 ProgramPointsAfterwards, 81 TransitionsBefore, 17 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 6 FixpointIterations, 37 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 6 ConcurrentYvCompositions, 5 ChoiceCompositions, 317 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 738 CheckedPairsTotal, 68 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was constructing difference of abstraction (2973states) and FLOYD_HOARE automaton (currently 460 states, 63 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 487 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 75 locations, 1 error locations. Result: TIMEOUT, OverallTime: 242.3s, OverallIterations: 38, TraceHistogramMax: 20, AutomataDifference: 205.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 6809 SDtfs, 12503 SDslu, 363780 SDs, 0 SdLazy, 209450 SolverSat, 2485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 113.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6066 GetRequests, 3550 SyntacticMatches, 3 SemanticMatches, 2512 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419245 ImplicationChecksByTransitivity, 75.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2973occurred in iteration=37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 37 MinimizatonAttempts, 59058 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.6s SatisfiabilityAnalysisTime, 13.2s InterpolantComputationTime, 6504 NumberOfCodeBlocks, 6197 NumberOfCodeBlocksAsserted, 324 NumberOfCheckSat, 6431 ConstructedInterpolants, 0 QuantifiedInterpolants, 2520029 SizeOfPredicates, 152 NumberOfNonLiveVariables, 11897 ConjunctsInSsa, 876 ConjunctsInUnsatCore, 73 InterpolantComputations, 3 PerfectInterpolantSequences, 22532/46005 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown